RL CHEM 2 Flashcards by Pappu Roy

●Rutherford bombarded _____ particles in discoveryof nucleus.—

Alpha Rays

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●Atomic orbits having same energy are called: —

Degenerate orbitals

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●When electrons collide with heavy metals than ____are produced.—

X-Rays

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●Atom with higher atomic number produces X-raysof: —

shorter wavelength

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●The atomic number of an element having maximumnumber of unpaired electrons in p-subshell is:—

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●When an atom absorbs energy the lines in thespectrum will appear which are:—

Darker

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●Colour of fluorescene produced by cathode raysdepends upon:—

composition of glass

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●Positive rays are produced: —

By the bombardmentof cathode rays on gas molecules

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●Geometry of simple molecule having sp3 hybridorbital is: —

Tetrahedral

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●Space around nucleus where finding probability ofelectrons is maximum is called:—

orbital

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●Geometry of molecule will be pyramidal if the outerpost shell of the central atom has: —

3 bond pairone lone pair

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●According to VESPR Model the geometry of moleculehaving 5 bond pair in outer most shell will be:—

Trigonal bi-pyramidal

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●Molecular orbital which have higher energy thanatomic orbitals is called:—

Anti-bondingmolecular orbital

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●Unpaired electron in a molecule gives _____character. —

Paramagnetic

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●Unit of dipole moment is:—

Debye

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●Which of the following can expel proteons fromparaffins? —

Neutron

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●Centrifugal forces are balanced in atom by:—

attractive forces

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●Spectrum is produced due to:—

different wavelength

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●Splitting of spectral lines when atoms are subjected tostrong electric filed is called:—

Stark effect

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●The rate of reaction:—

Decreases as the reactionproceeds

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●The addition of a catalyst to the reaction system: —

Increases the rate of forward as well as backwardreaction equally

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●The specific rate constant of a first order reactiondepends on the:—

Temperature

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●On increasing the temperature the rate of reactionincreases mainly because:—

Collision frequencyincreases

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●The value of activation energy is primarilydetermined by: —

Effective collision

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●Sum of exponents of molar concentration is called: —

Order of reaction

●Unit of rate of reaction is:—

Moles dm-3 sec-1

●Rate of reaction when concentration of reactants aretaken as unity is called:—

Specific rate constant

●Radiations are absorbed in: —

Spectrophotometermethod

●Energy of reactant higher than energy of productfavours: —

Exothermic

●Neutralization reactions and Ionic reactions havevery high rate of reaction because of: —

Doubledecomposition reaction

●The substances that reduces the effectiveness of acatalyst are called:—

Poisoning catalysts

●An enzyme has its specificity due to:—

structure

●A substance which increases the reactivity of enzymeis called: —

promoters

●When the reaction completes in more than one stepsrate of reaction will be determined by:—

sloweststep

●Energy of activation for backward reaction is lessthan forward reaction for ________ reaction.—

Endothermic

●When NaCl is dissolved in water the sodium ionbecomes: —

hydrated

●The oxidation number of nitrogen in NO3- is:—

●To prevent rancidification of food material, what isadded? —

Anti-oxidant

●Which of these substances is a good reducing agent?—

KBr

●When H2S reacts with halogens, the halogens are:—

reduced

●What is used as an oxidant, a reductant and an acid?—

H2O2

●Strongest reducing agent is:—

●Several blocks of magnesium are fixed to the bottomof a ship to:—

Prevent action of water and salt

●Prevention of corrosion of iron by zinc coating iscalled: —

Galvanization

●The oxidation number of C in CO2 is:—

●In the course of a chemical reaction an oxidant: —

gains electrons

●What happens when a sulphur atom becomes asulphide ion? —

It gains 2 electrons

●The atomic number of an element which shows theoxidation state of + 3 is:—

●An example for a strong electrolyte is:—

Sodiumacetate

●Theory of ionization was given by:—

Arrhenius

●An example of a Lewis acid is:—

AlCl3

●Ammonium hydroxide is a:—

Weak electrolyte

●Ionization depends upon:—

dilution

●The colour of an electrolyte solution depends on: —

The nature of both the ions

●The suitable indicator for strong acid and weak baseis: —

Methyl Orange

●The best conductor of electricity is a 1.0 M solutionof: —

Sulphuric acid

●In weak electrolytic solution, degree of ionization: —

Will be proportional to the square root of dilution

●A solution of FeCl3 in water acts as acidic due to: —

Hydrolysis of Fe3+

●According to which law, the degree of ionization isdirectly proportional to the dilution?—

Ostwald'sdilution law

●Enthalpy of combustion for food fuel and othercompounds can be measured accurately by:—

Bom calorimeter

●The strength of an acid depends on its tendency to: —

Donate protons

●Which of the following is non-electrolyte? —

C12H22O11

●NaOH is a strong base because:—

It gives OH- ion

●The pH indicators are: —

Either weak acids or weakbases

●An ionizing solvent has: —

High value of dielectricconstant

●The colour of an electrolyte solution depends on: —

The nature of both the ions

●If internal energy of the system is increased: —

Change in state of the system is increased

●____ is the study about energy of a chemical system.—

Thermochemistry

●The environment in which a system is studied is:—

surrounding

●Anything which depends upon initial and final stateof a system is:—

state function

●At infinite dilution, the percentage ionization for bothstrong and weak electrolytes is:—

100%

●Reaction in which heat evolves is called:—

Exothermic

●When enthalpy of reactants is higher than productthen reaction will be:—

Exothermic

●Octane number can be improved by:—

isomerization

●Alkanes containing a methyl group on main chain at2nd carbon are called:—

iso-alkane

When one hydrogen atom of alkane is removed then itis called: —

alkyl

●The rectified spirit contains:—

95% alcohol

●The basis on the mode of their formation, thepolymers can be classified:—

Both as addition andcondensation polymers

●The irritation caused by red ants bite is due to:—

Formic acid

●Which alcohol will undergo elimination reaction togive alkene in the presence of acidic potassiumdichromate? —

Tertiary alcohol

●Alkanes are also known as:—

Paraffins

●When - COOH is attached directly to the benzenering the acid is called:—

aromatic

●The common name of propane 1 3-dioic is:—

Malonicacid

●Sabatier Senderns reaction involve _________ inpresence of Ni.—

Aalkene & H2

●Which C-X bond has the highest bond energy permole? —

C-F

●Which compound is also known by the name ofcarbolic acid? —

C6H5OH

●Hydrogenolysis results in the formation of:—

alkane

●Which alkyl halide has the highest reactivity for aparticular alkyl group?—

R-I

●Ethyl chloride with nascent hydrogen produces:—

Ethane

●Heating phenol with Zn will yield:—

Benzene

●Which acid is used in the manufacture of syntheticrubber? —

Acetic acid

●The acid which is used as ink remover is:—

Oxalicacid

●Clemmensens reduction infolves the reduction of:—

Ketone

●The common thing in phthalic acid and oxalic acid isthat both are:—

Dicarboxylic

●The number of molecules taking part in the ratedetermining step is called:—

Order of reaction

●Glyptals are chiefly employed in:—

Surface coating

●Acidic amino acids have: —

2 carboxylic groups and1 amino group

●Removal of CO2 is called:—

decarboxylation

●Ethanol can be converted into ethanoic acid by:—

Oxidation

●The term internal salt refers to: —

Dipolar characterof amino acids

●Which alkyl halide out of the following may followboth SN1 and SN2 mechanism?—

(CH3)2 CH - X

●Natural rubber is which type of polymer?—

Additionpolymer

●Soda lime is a mixture of:—

CaO and NaOH

●Methyl alcohol is not used:—

As a substitute forpetrol

●When two moles of ethyl chloride react with twomoles of sodium in the presence of ether what willbe formed?—

1 mole of butane

●The ether used in Wurtz synthesis is:—

dry

●Dehalogenation of ethyl tetrahalide will give:—

Ethyne

●The organic acid that does not has COOH group is:—

Carbolic acid

●When CO2 is made to react with ethyl magnesiumiodide followed by acid hydrolysis the productformed is:—

propanoic acid

●R-Mg-Br is called:—

Grignard reagent

●Upto ___ C atoms alkanes are gases.—

●Grignard reagent is reactive due to:—

the polarity ofC-Mg bond

●Teflon is a polymer of the monomer or Teflon isobtained by the polymerisation of:—

Tetrafluoroethene

●Methanol can be obtained from:—

water gas

●The test which is used for the identification of amino-acids is:—

Ninhydrin test

●The starting material for the preparation of styreneis: —

Ethyne

●Nylon is not a:—

Homopolymer

●Polythene is:—

Thermoplastic

●Nylon threads are made of:—

Polyamide polymer

●An alcohol which can be prepared by fermentation is:—

CH3 - CH2 - OH

●Incomplete oxidation of methane in the limitedsupply of air forms leads to:—

CH3OH

●The molecular weight of cellulose varies between: —

20000 to 500000

●Orlon is a polymer of:—

Acrylonitrile

●Absolute alcohol is obtained when rectified spirit istreated with:—

CaO

●Carboxylic acid reacts with ammonia to formammonium salts which on heating produces:—

Acidamide

●Celluloid is:—

A thermoplastic material obtainedfrom cellulose nitrate and camphor

●Introduction of nitro group in a molecule is called:—

Nitration

●Polymerization of glycol with dicarboxylic acids is: —

Condensation polymerization

●Nylon-66 is a:—

Condensation polymer

●The complete reduction of carboxylic acid results inthe formation of:—

alkane

●Which polymer is formed by chloroethene?—

PVC

●Triethyl aluminium titanium chloride used in plasticindustry is a:—

Ziegler-Natta catalyst

●Bakelites are:—

Resins

●When alcohol reacts with phosphorous halides itgives: —

Alkyl Halides

●Order of ease of halogenation in alkane is:—

F2>Cl2>Br2>I2

●Among the following a natural polymer is:—

Cellulose

●Polymer used in bullet proof glass is:—

PMMA

●Nylon polymers are:—

Amphoteric

●Phenol was isolated by Runge from:—

Coal tar

●The organic acid that can be made from ethanol is:—

Acetic acid

●The gas used in manufacturing of urea fertilizer is: —

CH4

●The Zieglar-Natta catalysts are:—

Stereospecific

●Melamine is a:—

White crystalline solid

●Terylene is used for making: —

Silk, Seat belts andfabrics

●Formalin is _______ % solution of formaldehyde inwater. —

52%

●The formula of palmitic acid is:—

C15H31COOH

●Glyptal is a:—

Alkyd resin

●Ethers show functional group isomerism with:—

alcohol

●Removal of halogen and hydrogen atom is: —

dehydrohalogenation

●Formalin is _______ % solution of formaldehyde inwater. —

40%

●The aliphatic monocarboxylic acids are obtained bythe hydrolysis of:—

fats and oils

●Which one of the following is a linear polymer?—

Amylose

●Polymer formation from monomers starts by: —

Coordinate reaction between monomers

●Monomers are converted to polymer by: —

Condensation reaction between monomers

●The catalyst used in the manufacture of polyetheneby Ziegler method is:—

Titanium tetrachlorideand trimethyl aluminium

●Alkenes are produced from dehalogenation of: —

vicinal dihalo alkane

●Caprolactam is the monomer of:—

Nyon-6

●The process of fermentation of starch involve manyenzymes the sequence of enzymes used are:—

Diastase-maltase-zymase

●The basic hydrolysis of ethyl acetate produces: —

Ethanol and sodium acetate

●'Starch' consists of two fractions; one is á-amyloseand the other is:—

Amylopectin

●In the natural rubber 'Caoutchouc' the isopreneunits are joined by:—

Head-to-tail

●What catalyst is employed when benzene is preparedfrom acetylene at 700 C?—

Organo-nickel

●Carboxylic acid on reduction with HI / phosphorousyields: —

alkane

●In benzene sulphonic acid the sulphonic group isattached with benzene ring through:—

Sulphur

●The residue obtained after the crystallization of sugarfrom concentrated sugar cane juice is called:—

molasses

●How many moles of H2 are added up when benzene isheated with hydrogen in the presence ofplatinum?—

●The reaction of carboxylic acids with alcohols inpresence of concentrated H2SO4 is called:—

esterification

●The amino acid present in cheese is:—

Tyrosine

●By which method the molecular mass of benzene wasdetermined as 78.108?—

Vapour density method

●Water gas heated at 4500 C and 200 atm pressure inthe presence of ZnO+Cr2O3 will produce:—

methanol

●Preparation of vegetable ghee involves:—

hydrogenation

●Michael Faraday discovered benzene in the gas whichwas produced by destructive distillation ofvegetable oil that is done in:—

The absence ofOxygen

●Hydro carbons which burn with smoky flame arecalled: —

aromatic

●Octane number 2 2 4-trimethyl pentane is:—

100

●Geometric isomerism is usually found in:—

alkenes

●Pentane and 2-methyl butane have the same: —

Percentage composition

●Organic compounds that are essentially non-polarand exhibit weak intermolecular forces have:—

Low melting points

●The first organic compound was synthesized inlaboratory by:—

Wohler

●First organic compound synthesized in laboratorywas: —

Urea

●The property of carbon chain formation is called:—

Catenation

●Chemical properties of first member of homologousseries with respect to other members are:—

same

●The organic compounds having very high molecularweight are called:—

Polymers

●Compounds having same molecular formula butdifferent in structural formula are called:—

Isomer

●Organic compounds are soluble in:—

Non-polarsolvent

●Methane is used in power generation in chemicalindustries being a:—

cheaper

●Crude oil is blackish coloured liquid produced afterthe decay of organic matter present between:—

Sedimentary Rocks

●Which one of the following compounds shows intenseknocking?—

n-Heptane

●What can be used as anti-knocking agent?—

(C2H5)4Pb

●Ether functional group can be represented as:—

R-O-R

●Isomerism which is present only in alkene is: —

cis-trans isomerism

●A single atom or group of atoms which givescharacteristic properties to a compound is called:—

Functional Group

●Which is a Compound containing benzene ring in itsstructure?—

Aromatic compound

●Which type of isomerism is shown by 2-propanol and1-propanol?—

position isomerism

●In sp3 hybridization the expected geometry ofmolecules will be:—

Tetrahedral

●Only sigma bonds are present in:—

ethoxy ethane

●In cyano group the carbon atom shows which kind ofhybridization?—

●The structure of ethyne is:—

linear

●The fractional distillation of petroleum producesgasoline up to:—

20%

●The general formula of cycloalkene is:—

CnH2n-2

●Which is not heterocyclic compound?—

Aniline

●What is the number of isomers in C5H12?—

Three

●Elements in the same vertical group of the periodictable have same:—

Number of valence electrons

●Plaster of Paris hardens by:—

Uniting with water

●The most electropositive amongst the alkaline earthmetals is: —

Barium

●Hydrogen does not combine with:—

Helium

●Paramagnetism is exhibited by molecules: —

Carrying unpaired electrons

●Transitional elements exhibit variable valenciesbecause they release electrons from which of thefollowing orbits? —

(n - 1) d and ns orbits

●Stainless steel is an alloy of: —

Nickel and chromium

●The property of the alkaline earth metals thatincreases with their atomic number is:—

Solubility of their hydroxides

●In electrolysis of aluminium oxide which of thefollowing is added to accelerate the process?—

Cryolite

●As compared to lithium, sodium reacts quickly withwater because:—

it is

●In the first transition series, the highest boiling pointand melting point is of:—

●The H - O - H angle in water molecule is about:—

105°

●Lanthanoids are: —

14 elements in the sixth period(atomic no. = 58 to 71) that are filling 4f sublevel

●Temporary hardness of water is due to the presenceof: —

Magnesium bicarbonate

●The composition of tritium is: —

1 electron, 1 proton,2 neutrons

●An element having low value of ionization energy andlow value of electron affinity is likely to belong to:—

Group IA

●Sodium thiosulphate is used in photography:—

Toconvert metallic silver into silver salt

●One of the important use of ferrous sulphate is in the:—

Manufacture of blue black ink

●Among halogens the highest boiling point is of:—

Iodine

●Hydrogen acts as a reducing agent and thusresembles:—

alkali metals

●Of the metals Be, Mg, Ca and Sr of group II A. In theperiodic table the least ionic chloride would beformed by:—

●Tritium undergoes radioactive decay giving:—

â-particles

●Hydrogen cannot reduce:—

Hot Al2O3

●The purification of alumina is called :—

Baeyer'sprocess

●The reagent commonly used to determine hardness ofwater titrimetrically is:—

Disodium salt of EDTA

●The elements of group IA provide a colour to theflame of Bunsen burner due to:—

Low ionizationpotential

●When washing soda is heated: —

Water vapour isreleased

●The most dangerous method of preparing hydrogenwould be by the action of HCl and:—

●Valency electrons in alkali metals are:—

●Transition metals are often paramagnetic owing to:—

The presence of one or more unpaired electronsin the system

●Zinc and mercury do not show variable valency liked-block elements because:—

Their d- shells arecomplete

●In first transition series, the melting point of Mn islow because:—

of weak metallic bonds

●The tendency towards complex formation ismaximum in: —

d - block elements

●Elements which generally exhibit multiple oxidationstates and whose ions are usually coloured are: —

Transition elements

●Periodic table provides a basic framework to studyelements with respect to their: —

Physicalproperties, chemical properties and properties oftheir compounds

●Concept of Triads was introduced by:—

Dobereiner

●In modern periodic table all the elements arearranged in ascending order of:—

atomic number

●The longest period in the modern periodic table is: —

6th period

●Variable valency is shown by:—

Transition elements

●Seventh period contains _____ normal elements.—

●Modern periodic table has been divided in how manyblocks? —

4 blocks

●Non-metals usually form:—

acidic oxides

●Amphoteric oxides are those which possess ___properties.—

acidic and basic

●Hydrogen resembles with carbon because of havingremarkable:—

reducing properties

●Heavy water is used in atomic reactor as:—

Bothmoderator and coolant

●The atomic radii decreases by increasing atomicnumber in: —

Elements from Li to Ne

●Which discovery caused a revision in the periodic lawas stated by Mendeleev?—

Atomic number byMoseley

●An element has electronic configuration 1s2 2s2 2p2.It belongs to:—

Group IV-A

●The property which increases up to group IV-A thendecreases onwards:—

Melting & boiling points

●The transitional metal which form green compoundin +3 oxidation state and yellow orange compoundin +6 oxidation state is:—

●The atoms of same element having same atomicnumber but different mass number are called:—

Isotopes

●Deuterium reacts with oxygen to form:—

Heavywater

●Ionization energy depends upon:—

I.E depends uponall of the above and nature of orbital

●Shielding effect across the period:—

Remainsconstant

●The ionic compound BaSO4 is insoluble in water dueto: —

High lattice energy

●Beryllium differs from rest of the members of itsfamily (Group-IIA) in many ways. The reason forthis is its: —

Small size and higherelectronegativity

●Based on lattice energy and other considerationswhich one of the following alkali metal chlorides isexpected to have the highest melting point?—

NaCl

●The hardest substance amongst the following is:—

B4C

●Which of the following gives propyne on hydrolysis?—

Magnesium carbide (Mg2C3)

●When two ice cubes are pressed over each other, theyunite to form one cube. Which force is responsibleto hold them together?—

Hydrogen bondformation

●In a reaction the ferrous Fe++ iron is oxidised toferric Fe+++ ion. The equivalent weight of the ionin the above reaction is equal to:—

the atomicweight

●Mercury is the only metal which is liquid at 0° C Thisis due to its:—

Very high ionisation energy andweak metallic bond

●Addition of 2nd electron to a un-negative ion isalways:—

Endothermic

●Higher value of electron affinity means: —

Atom willgain electron easily

●Metallic characters of alkali metals: —

Increasedown the group

●Pure hydrogen is obtained by carrying electrolysis of:—

Ba(OH)2 solution

●Mercury is transported in metal containers made of:—

Iron

●The liquid field metal expanding on solidification is:—

●When electric current is passed through an ionichydride in the molten state?—

Hydrogen isliberated at the anode

●Melting points of VII-A group elements down thegroup: —

Increase

●Oxidation state of an atom represents: —

Apparentcharge in compound

●Halides in which halogen atoms act as a bridgebetween two atoms of the other element arecalled: —

Polymeric halides

●Pure water can be obtained from sea water by: —

Reverse osmosis

●Ordinary hydrogen at room temperature is a mixtureof: —

75% of o-Hydrogen + 25% of p-Hydrogen

●The halogen having highest electron affinity is:—

Chlorine

●Less electronegative elements such as Be Ga A etcform: —

Polymeric halide

●Iodine is solid due to:—

High polarizability

●The metal ion which does not form colouredcompound is: —

Zinc

●The permanent hardness of water can be removed, byadding: —

Washing soda

●Stainless steel does not rust because: —

Chromiumforms an oxide layer and protects iron fromrusting

●Heavy water freezes at:—

3.8°C

●Triatomic hydrogen is called:—

Hyzone

●Hydrogen combines with other elements by: —

Losing, gaining or sharing electron

●True increasing order of acidity of the oxides of Mnis: —

MnO < MnO2 < Mn2O7

●Among the halogens the rare element is:—

Astatine

●Electrolysis of fused sodium hydride liberatehydrogen at the: —

Anode

●Bromine can be liberated from KBr solution by theaction of: —

Chlorine

●The colour of chlorine gas is:—

greenish yellow

●The most powerful oxidizing agent among thehalogens is: —

●Hydrogen burns in air with a:—

Light bluish flame

●Heavy water D2O is: —

Water obtained by repeateddistillation and condensation

●Bleaching powder is an example of:—

Mixed salt

●Triple point of water is:—

273 K

●Deuterium differs from hydrogen in:—

Physicalproperties

The velocity of neutrons in nuclear reactor is sloweddown by: —

Heavy water D2O

●Hydrogen can be fused to form helium at: —

Hightemperature and high pressure

●The halogen which reacts spontaneously with gold(Au) to form Au+3 is:—

Cl2

●The halogen which reacts very slowly with halogen is:—

Iodine

●Substance which is found in dried up lakes of Tibetand California is:—

Tincal

●Bleaching powder is not used for bleaching:—

costlyfabrics

●Borax is a white crystalline solid and it is: —

moresoluble in hot water

●Which pair does not show hydrogen isotopes? —

Ortho hydrogen and para hydrogen

●Photographic plates are coated with a thin film of:—

AgBr

●Special features of borate glass is that it is: —

heatresistant

●Cassiterite is concentrated by:—

Electromagneticseparation

●A substance which reacts with gangue to form fusiblematerial is called:—

Flux

●In blast furnace iron oxide is reduced by:—

●Main ore of aluminium is:—

Bauxite

●The metal which is used in thermite process becauseof its activity is:—

aluminium

●Purpose of smelting of an ore is:—

To reduce it

●Compounds of nitrogen and phosphorus are mostly:—

covalent

●The most electronegative element among thefollowing is: —

●SO3 is not absorbed in water directly because: —

Reaction is exothermic

●Phosphine gas will be produced if phosphorous acid issubjected to:—

Reduction and Decomposition

●Metallurgy is the process of: —

Extracting the metalfrom the ore

●Froth floatation process for the concentration of oresis an illustration of the practical application of:—

Adsorption

●Azo-dyes are prepared from:—

Aniline

●C3H9N1 represents:—

Amine

●Aluminium oxide is:—

Amphoteric oxide

●Which electronic configuration corresponds to anelement of group IIIA?—

1s2 2s2 2p6 3s2 3p1

●Tincal is a mineral of:—

●Phosphorus is a Greek word and it means:—

Lightbearing

●Aniline is usually purified by:—

Steam distillation

●Allotropic form of phosphorus that is poisonous is:—

White

●In network of silica (SiO2) each silicon atom issurrounded by _____ atoms of oxygen.—

●The process of aluminium extraction is called:—

Hallprocess

●KCN reacts readily to give a cyanide with:—

Ethylbromide

●The Hinsberg's method is used for: —

Separation ofamine mixtures

●When aniline is treated with sodium nitrite andhydrochloric acid at 0 degree C, it gives:—

Diazonium salt

●Acetic anhydride can be obtained by treating ethylalcohol with:—

P2O5 and H2SO4

●Phosphorous acid upon thermal decomposition yieldsphosphoric acid and:—

Phosphine

●The element of group VIA which is a non-metal is:—

●Phosphoric acid is a weak acid and its basicity is:—

●All the elements in group VIA are ____ in nature.—

Polymeric

●Which allotropic form of phosphorous is the moststable?—

Black

●Boron is non metal while other elements of IIIAgroup are metals. This is because: —

it formsmolecular addition compounds; and it has smallsize

●The chemical composition of cinnabar is:—

HgS

●Oxygen and sulphur resemble in all except:—

Showsame oxidation state

●Oxygen does not react with all except:—

Metals

●CO2 is gas while SiO2 is solid at room temperature.Why? —

CO2 is an independent molecule whileSiO2 has network covalent structure

●Arsenic oxides are removed by passing through: —

Ferric hydroxide

●In which compound nitrogen has maximum oxidationstate? —

HNO3

●When sulphuric acid is treated with ethanol sulphuricacid behaves like:—

a dehydrating agent

●The coloured glassy mass in borax bead test is due tothe formation of:—

metal meta borate

●Boron is non-metal whereas A1 is metal. It is due to:—

small size and high nuclear charge

●Boron in soil has been considered micronutrient for:—

proper growth of plants

●Boric acid cannot be used:—

in soda bottles

●In photography sodium thiosulphate is used as: —

complexing agent

●Lanthanides and actinides resemble in:—

oxidationstate

●Requirement of macronutrient per acre of the land is:—

5 to 200 kg

●Three elements needed for the healthy growth ofplants are: —

NPK

●Hypochlorous acid is used for disinfecting the waterit reacts with the dissolved ammonia producing:—

NH2Cl, NHCl2, NCl2

●The yellow colour in photochemical smog is due topresence of:—

Nitrogen dioxide

●Incineration of municipal waste is carried out in thetemperature range of:—

9000-10000 C

●Which gas is the main cause of acid rain?—

NO2

●In the purification of portable water the coagulantused is:—

Alum

●Newspaper can be recycled again and again howmany times?—

5 times

●The main pollutant of leather tanneries in the wastewater is:—

Chromium IV

●A single chlorine free radical can destroy how manyozone molecules?—

100000

●Which substance can be used for disinfecting water?—

KMnO4

●Chlorination of water may be harmful if the watercontains:—

Ammonia

●The percentage of suspended solid waste in raw wateris removed by coagulation is:—

●Ozone hole is substantial depletion of ozone in everyyear during:—

September-November

●The main product of bacterial action is:—

●Pollutants have adverse effect over:—

Ecosystem

●The nucleus of an atom consists of:—

Protons andNeutrons

●The most electronegative element among thefollowing is:—

Fluorine

●The metal used to recover copper from a solution ofcopper sulphate is:—

●The number of d-electrons in Fe2+ (Z = 26) is notequal to that of:—

p-electrons in CI (Z = 17)

●The metallurgical process in which a metal isobtained in a fused state is called:—

Smelting

●The law which states that the amount of gas dissolvedin a liquid is proportional to its partial pressure is:—

Henry's Law

●The main buffer system of the human blood is:—

H2CO3 - HCO3

●The gas present in the stratosphere which filters outsome of the sun's ultraviolet light and provides aneffective shield against radiation damage to livingthings is:—

Ozone

●The most commonly used bleaching agent is:—

Chlorine

●The nucleus of a hydrogen atom consists of:—

1proton only

●The heat required to raise the temperature of body by1 K is called:—

Thermal capacity

●The nuclear particles which are assumed to hold thenucleons together are:—

Mesons

●The mass of P4O10 that will be obtained from thereaction of 1.33 gram of P4 and 5.07 of oxygen is:—

3.05 gram

●The octane number of zero is assigned to:—

n-Heptane

●The metal that is used as a catalyst in thehydrogenation of oils is:—

●The most abundant rare gas in the atmosphere is:—

●The Latin word 'formica' means ant. The nameformic acid is derived from this Latin wordbecause: —

this acid was first obtained by thedistillation of ants

●The ore which is found in abundance in India is:—

Monazite

●The heat energy produced when the human bodymetabolizes 1 gram of fat is:—

39 KJ

●What are the number of moles of CO2 which contains16 g of oxygen?—

0.5 mole

●The main use of salt in the diet is to: —

produce insmall amounts the hydrochloric acid required forthe digestion of food

●The luster of a metal is due to: —

presence of freeelectrons

●The number of water molecules present in a drop ofwater (volume 0.0018 ml) at room temperature is:—

6.023 × 1019

●The most malleable metal is:—

Gold

●The oil used in the froth floatation process is:—

PineOil

●The mass of one Avogadro number of helium atom is:—

4.00 gram

●The items amenable to detection by soft x-rays are:—

genuine coins from counterfeit coins

●The material which can be deformed permanently byheat and pressure is called a:—

Thermoset

●The mass number of a nucleus is:—

the sum of thenumber of protons and neutrons present in thenucleus

●The inexpensive and commonly used variety of glassis called soda glass. It is called so because: —

ismade using soda (sodium carbonate)

●The gas used in the manufacture of Vanaspati fromvegetable oil is:—

Hydrogen

RL CHEM 2 Flashcards

(397 cards)