RL CHEM 1 Flashcards by Pappu Roy

●The element having strongest intermolecular forces of attraction—

Iodine

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●When substance moves from a solid to a liquid stateall of the following changes occur except:—

Kinetic energy of molecules decrease

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●When the atoms of third layer are arranged in such away that they directly lie above the atoms of firstlayer, then this arrangement is called:—

ABAB(hexagonal)

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●Most of thermodynamic parameters are:—

State functions

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●The correct set of four quantum numbers for thevalence electron of rubidium atoms (Z = 37) is:—

5, 0, 0, +1/2

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●The atomic radius of the elements ____ as one movesdown the first group of the periodic table.—

Increases

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●Beryllium Sulphate is less soluble in water due to: —

High inflammable energy

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●What is the name of that system, which usesradioactivity to decide the period of materials of-pre-historic period?—

Carbon Dating

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●The anode in a dry cell consists of:—

Zinc

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●Cement is made hard with: —

Hydration anddissociation of water

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●What happens when a chemical bond is formed? —

Energy is always absorbed

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●Cane sugar is a—

Carbohydrate

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●In which state maximum iron ore is found?—

Fe2O3

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“●”“All the four quantum numbers of two electrons in anatom are not the same.”” It is the law of: —”

Exclusion Principle of Pauli

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●Commercial nitric acid is coloured because itcontains dissolved?—

Nitrous Oxide

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●Fertiliser having high nitrogen content is:—

Ammonium Nitrate

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●Where does the oxygen that keeps us alive comefrom: —

Water

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●The gas used for artificial fruit ripening of green fruitis: —

Ethylene

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●The three elements most needed in commonfertilizers are:—

Nitrogen, Potassium andPhosphorus

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●Which metal pollutes the air of a city having largenumber of automobiles?—

Lead

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●Which gas is present under pressure in soft drinks?—

Carbon dioxide

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●The substance which does not expand on going fromliquid slate to solid state is:—

Type Metal

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●The radio-active element used in heart pacemakersis:—

Uranium

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●The element which is commonly used in nuclear forproducing electricity by nuclear fission is:—

Uranium

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●What is used as a lubricant in heavy machines?—

Graphite

●What is used to iodize common salt?—

PotassiumIodate

lMilk is a colloidal system in which:—

Fat is dispersedin water

●The enzyme that converts glucose to ethyl alcohol is:—

Zymase

●Silk fibre chemically is:—

Protein

●Who developed Hydrogen Bomb?—

Edward Teller

●When there are two electrons in the same orbital,they have: —

Opposite spin

●Galvanization is the:—

deposition of zinc on iron

●Fermentation of milk to curd is due to:—

Lactobacillus

●By which organic compound all the oils are known?—

Hydrocarbon

●The atomic number of carbon is 6 and its atomicmass is 12. How many are there protons in thenucleus of carbon?—

●Who developed atom bomb?—

J. RobertOpenheimer

●The major harmful gas emitted by automobile vehiclewhich causes air pollution is:—

Carbon dioxide

The acid used in lead storage cells is:—

Sulphuric Acid

●Milk tastes sour when kept in the open for sometimedue to the formation of:—

Lactic Acid

●What is the most commonly used substance influorescent tubes?—

Mercury vapour and argon

"●What is ""milk of magnesia"" chemically?—"

Magnesium Hydroxide

●Soap is prepared by boiling caustic soda with:—

Fats

●Bronze is an alloy of:—

Copper and Tin

●The natural source of hydrocarbon is:—

Crude Oil

●What is chiefly present in LPG (Liquefied PetroleumGas)? —

Butane

●Humburger effect is otherwise known as:—

ChlorideShift

●Bauxite is an alloy of which of the following metals?—

Aluminium

●Nucleus of an atom consists of:—

Proton and Neutron

●Galvanized iron is made by coating iron with:—

Zinc

●Isobars are lines joining places having equal:—

Pressure

●Global warming is mainly due to the accumulationof:—

Carbon dioxide

●The most suitable vessel for storing concentratedsulphuric acid is:—

Glass Vessel

●What is the element that is in the highest percentagein the composition of the earth?—

Oxygen

●The advantage of detergents over soaps is: —

Detergents give lather even with hard water

●The fundamental particles present in the nucleus ofan atom are:—

Proton, Neutron

●Bleaching action of moist sulphur dioxide is becauseof its: —

Oxidizing property

●The long range potential of nuclear energy in Indiadepends on its reserves of:—

Uranium

●The ratio of pure gold in 18 carat gold is:—

75%

●Diamond is harder than graphite because of:—

Difference in layers of atoms

●Gobar gas contains mainly:—

Methane

●The gas used for artificial fruit ripening of green fruitis: —

Ethylene

●What is the element required for solar energyconversion? —

Silicon

●Liquid crystal was discovered by:—

Fredrick Reinter

●If electricity is passed through CuSO4 solution byusing Pt electrode then which of the followingpossible change occurs? —

Colour of the solutionbecomes fade

●Two fundamental ways to transfer energy are:—

Heat and Work

●Stronger the oxidizing agent greater is the: —

Reduction potential

●What happens when common salt is dissolved inwater?—

Boiling point of water increases

●Which one is a conductor but is not malleable?—

Graphite

●Every sample of matter with uniform properties andfixed composition is called:—

Phase

●Which has maximum oxidation number?—

●Homogeneous mixture of two or more than twocompounds is called:—

Solution

●The component of solution which is in smalleramount is called:—

Solute

●The density of water may be:—

Greater than that ofice

●Forces of attraction which may be present between allkinds of atoms and molecules are:—

Van der Waal

●The quantity of heat required to convert one mole ofliquid into its vapours at its boiling point is calledmolar heat of: —

Vaporization

●Solution with maximum concentration of solute atgiven temperature is called:—

Saturated solution

●The molal boiling point constant is the ration of theelevation of boiling point to:—

Molality

●In an electrolytic cell current flows?—

From anode tocathode outside the cell

●Steam causes more sever burn than the boiling waterbecause it possesses because of the:—

Latent heatof vaporization

●Water has maximum density at:—

40 C

●In a galvanic cell: —

Chemical energy is convertedinto electricity

●Number of moles in 1 kg of solvent is called:—

Molality

●In partially miscible liquids the two layers are: —

saturated solutions of each liquid

●If the volume of solution is equal to sum of volumes ofits all components then the solution: —

will be anideal solution

●The degree of dissociation of week electrolyteincreases as: —

Dilution increases

●Molten NaCl conducts electricity due to the presenceof: —

Free ions

●The conversion of vapours back into their liquid stateis called: —

condensation

●When water freezes at 00 C its density decreases dueto: —

the presence of Empty space in thestructure of ice

●Electricity in voltaic cell is produced due to: —

Bothoxidation and reduction

●In electrolytic solution conductance of electricity isdue to: —

Ions

●In electrolytic cell electricity carries: —

Non-spontaneous reaction

●Which one of the following is a correct statement? —

Acetic acid is a weak electrolyte

●Reaction at anode is called:—

Oxidation

●In an electrolytic cell cathode provides electrons to:—

Positive ion

●In Galvanic cell electrons flow from anode to cathodethrough: —

External electric circuit

●Decrease in oxidation number is called:—

reduction

●For the measurement of standard electrode potentialZn is dipped in:—

1 M ZnSO4 solution

●A gas absorbs a photon of 355 nm and emits at twowavelengths. If one of the emissions is at 680 nm,the other is at: —

743

●The solution which distils over with change incomposition is: —

Zeotropic solution

●Salt bridge transfers:—

Ions

●Isotopes differs in:—

chemical properties

●The attractive forces between the partial positive endof one molecule and partial negative end of othermolecule are called:—

Dipole-dipole forces

●Vapour pressure is not affected by:—

Surface area

●Voltaic cell can be recharged by:—

by replacingexternal circuit with external source of electricity

●Temperature for the measurement of standardelectrode potential is:—

298K

●Electrode potential of Zn: —

depends on the natureof the coupled electrode

●List of elements based on hydrogen scale is called: —

electrochemical series

●The mass of one mole of electron is:—

0.55

●Mixtures which distill over without change incomposition is called:—

azeotropic mixture

●The conductivity of strong electrolyte: —

Increase ondilution slightly

●The number of atoms in a molecule determines:—

atomicity

●Rising of a wetting liquid in a capillary tube is due to:—

Adhesive forces

●Which element has same isotopes like palladium?—

Calcium

●Water absorber used in combustion analysis is:—

Mg(CIO4)2

●A limiting reactant is one which: —

gives theminimum amount of the product underconsideration

●Table salt crystallizes with a: —

body centered cubiclattice

●Concentration of solute molecule when they are inequilibrium with solid substance at particulartemperature is called: —

solubility

●During which process empty spaces between particlesbecome minimum?—

Condensation

●When a solution of an electrolyte is heated theconductance of the solution:—

Increases becausethe electrolyte is dissociated more

●In the electrolytic cell, flow of electrons is from: —

Anode to cathode through internal supply

●The element that act as anode always have _______position in electrochemical cell.—

Higher

●Beckmanns apparatus is used to measure:—

depression in freezing point

●The determination of correct molecular weight fromRaoult's law is applicable to:—

non volatile solutein a dilute solution

In galvanic cell Zn acts as an anode so its value ofstandard reduction potential in comparison tocoupled electrode would be:—

Greater

●Liquid gets the shape of the container when it ispoured into it. Which one of the following reasonsjustifies it? —

Liquid molecules can slide overeach other

●Greater value of standard reduction potential greaterwill be tendency:—

to get reduced

●Greater value of standard reduction potential greaterwill be tendency:—

to accept electrons

●Boiling point elevations can be measured by: —

Landsbergers method

●Greater value of standard reduction potential smallerwill be tendency:—

to form positive ions

●Lead accumulators are:—

voltaic cell

●In alkaline battery the anode is made up of:—

●The strength of solution of an element whoseelectrode potential is to be measured is:—

●Apparent charge on atom in molecule is:—

OxidationNumber

●Percentage of sulphuric acid in lead accumulator is:—

30%

●The half cells are interconnected through:—

SaltBridge

●The compounds in which water molecules are addedare called:—

Hydrates

●What is the chemical name for 'Baking Soda'? —

Sodium bicarbonate

●Saccharin is made up of:—

Toluene

●PVC is obtained by the polymerization of:—

VinylChloride

●The metallic constituents of hard water are:—

Calcium, magnesium and iron

●The pH of human blood is between:—

7.5-8

●Aspirin is:—

Acetyl Salicilic Acid

●Cloud is a colloidal dispersion of:—

Water drops in adispersion medium of air

●Which variety of coal contains recognizable traces ofthe original plant material?—

Peat

●Which is the purest form of iron?—

Wrought Iron

●Which metals forms an amalgam with other metals?—

Mercury

●Detergents used for cleaning clothes and utensilscontain:—

Sulphonates

●Radioactive disintegration of uranium ultimatelyresults in formation of:—

Lead

●What is used in making smoke bombs?—

Phosphorus

●German silver is an alloy of:—

Zinc, Copper andNickel

●A metal is exposed to the atmosphere for some time.It becomes coated with green carbonate. Themetal must be: —

Copper

●A super-cooled liquid is—

Glass

●If we provide very high amount of heat to a liquid itsboiling point will:—

remain constant

●Crystallites are present in:—

amorphous solids

●A solid may be made up of:—

Atoms, ions ormolecules

●One Faraday of electricity when passed through asolution of copper sulphate deposits:—

1 gmequivalent of Cu

●The amount of ion discharged during electrolysis isnot directly proportional to:—

Resistance

●When the sample of copper with zinc impurity is tobe purified by electrolysis, the appropriateelectrodes are Cathode Anode for:—

Pure copperImpure sample

●A malleable solid is one which can be: —

Convertedinto thin sheets

●The type of filtering media used for filtrationdepending upon: —

Nature of precipitate

●A safe and more reliable method for drying thecrystal is: —

Vacuum desiccators

●Amorphous substances posses: —

No sharp meltingpoints

●Crystalline solids can be identified easily from their:—

sharp melting points

●Boiling points of hydrocarbons increase with theincrease in number of carbon atoms. It is mainlydue to: —

More strength of London forces

●The viscosity of solids is:—

infinite

●A method of separation of components from itssolution using Distribution law is:—

Solventextraction

●During the electrolysis of fused NaCl3 which reactionoccurs at anode?—

Chloride ions are oxidized

●The number of moles of solute per kg of a solvent iscalled its:—

Molality

●Equal masses of methane and oxygen are mixed inempty container at 250?(c)The fraction of totalpressure exerted by oxygen is:—

one / three

●Hydration is a process in which:—

Both ions andmolecules are surrounded by water molecules

●Plasma is used in:—

Fluorescent bulb

●The molecules of CO2 in dry ice form:—

Molecularcrystal

●Electrolysis of aqueous HCl solution produces: —

H2gas at the cathode

●The phenomenon in which a compound exists in twoor more crystalline forms is called:—

Polymorphism

●Bucky balls is an allotropic from of:—

Carbon

●ppm means: —

parts of solute in one million parts ofsolution

●1 molar solution of glucose in water contains weightof glucose:—

180g/dm3

●Dilution, temperature and nature of electrolyte affectthe:—

conductivity of solution

●Increasing the temperature of an aqueous solutionwill cause: —

Decrease in molarity

●Amount of electricity that can deposit 108 gm ofsilver from AgNO3 solution is:—

1 faraday

●What will be the molarity of a solution containing 5gof sodium hydroxide in 250ml solution?—

0.5

●Bohr's model is contradicted by: —

Heisenbergsuncertainty principle

●Only London dispersion forces are present amongthe: —

Molecules of solid iodine

●Water of crystallization can be removed by:—

heating

●Atomic radius can be determined by:—

X - raydiffraction

●A solution of sodium sulphate in water is electrolysedusing inert electrodes. The products at the cathodeand anode are respectively:—

H2 ,O2

●The rate constant of a reaction is equal to rate ofreaction: —

When concentrations of all reactantsare unity

●The number amino acid units for each turn of helixon average are:—

●An electric current is passed through an aqueoussolution of the following. Which one shalldecompose?—

AgNO3

●Stronger is the oxidizing agent greater is the: —

standard reduction potential

●The relative lowering of vapour pressure is directlyproportional to molality if the solution is:—

dilute

●If a physical and chemical change takes place at aconstant pressure then the heat change during theprocess is called:—

Enthalpy change

●On the electrolysis of aqueous solution of sodiumsulphate, on cathode we get:—

●Nitrates of which pair gives different products onthermal decomposition?—

Li Na

●Which is carnalite?—

KCI

●Isomorphic substances have: —

Different physicaland chemical properties

●The pressure during the molar heat of fusion is kept:—

1 atmosphere

●Conductivity of a solution is directly proportional to:—

Number of ions

●Under a given set of experimental conditions, withincrease in the concentration of the reactants therate of a chemical reaction:—

increases

●During the electrolysis of an electrolyte, the numberof ions produced, is directly proportional to the:—

Quantity of electricity passed

●Electrolytic conduction differs from metallicconduction in that in the case of electrolyticconduction. Which of the following statementsis/are correct? —

The resistance decreases withincreasing temperature

●The rate at which a substance reacts depends on its:—

Active Mass

●The addition of a polar solvent to a solid electrolyteresults in: —

Ionization

●Electrolysis involves oxidation and reductionrespectively at:—

Anode and Cathode

●On electrolyzing a solution of dilute H2SO4 betweenplatinum electrodes, the gas evolved at the anodeis:—

●36 g water and 828 g ethyl alcohol form an idealsolution. The mole fraction of water in it, is:—

0.1

●A molal solution is one that contains one mole of asolute in:—

1000 gm of the solvent

●The most reactive allotropic form of phosphorus is:—

White

●Chemical composition of cinnabar is:—

HgS

●Which molecule has the highest bond energy amongthe halogens?—

Chlorine

●When chlorine is passed through hot solution ofcaustic soda the reaction is said as:—

Disproportionation reaction

●The most paramagnetic element is:—

Iron

●Diameter of an atom is in the order of:—

0.2 nm

●Mass spectrometer is used to determine Mass numberof isotopes and:—

Relative abundance

●Molecular ions are formed by passing: —

Highenergy electron beam and X-Rays

●Empirical formula of chloroform is:—

CHC13

●Which one of the following looks odd?—

H2S

●A great variety of the organic compounds is due to itsproperty of carbon:—

Exhibit catenation

●The amount of heat absorbed when one mole of aliquid is changed into gas at its boiling point is: —

Molar heat of vaporization

●Pure water does not conduct electricity because it: —

Is almost totally unionized

●In aqueous solution, strong electrolytes: —

Ionizealmost completely

●Vinyl acetylene combines with hydrochloric acidproduces: —

Chloroprene

●Molecular mass of water (18g) means: —

1-molemolecules of water

●0.36 moles of each aluminium and oxygen react witheach other to produce aluminium oxide. Theamount of product formed is:—

0.18 mole

●When 1 coulomb of charge is passed throughelectrolyte solution, then the mass deposited isequal to:—

Electrochemical equivalent

●In electrolysis of a fused salt, the weight of the depositon an electrode will not depend on:—

Temperature of the bath

●Electrolysis of molten anhydrous calcium chlorideproduces: —

Calcium

●Strong electrolytes are those which: —

Completelydissociate into ions at all dilutions

●Which of the following is not a non electrolyte?—

Acetic Acid

●One mole of CO2 contains:—

6.022 × 1023 atoms ofcarbon

●The number of isotopes of elements with even massnumber and even atomic number are:—

154

●Size of molecule depends upon: —

Shape of moleculeand atomicity

●The number of moles of CO2 which contains 16 g ofoxygen is: —

0.5

●How many isotopes have odd atomic number?—

●Percentage of calcium in calcium carbonate is:—

40%

●When benzene is heated in air with V2O5 at 4500Cyields: —

Maleic anhydride

●Combustion analysis is performed to determine:—

Empirical formula

●When toluene reacts with chlorine in sunlight thefirst major product is:—

Benzyl chloride

●When CO2 is made to react with ethyl magnesiumiodide in dry ether followed by acid hydrolysisyields: —

Propanoic acid

●The process of fermentation involves all the enzymesexcept: —

Sucrase

●Ethyl chloride on reduction in the presence ofZn/HCI produces:—

Ethane

●Which one does not exhibit aldol condensation?—

Benzaldehyde

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

Malonic acid

●Industrial materials thermal power stations arecoated with:—

Epoxy paints

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

Carbon dioxide

●What is the relative rate of effusion of CO and CO2?—

CO is 1.25 times faster than CO2

●The weakest (in strength) of the followingintermolecular forces is:—

Vander Waals force

●Ideal gasses have all the following characteristicsexcept:—

The molecules occupy no space

●Isotopes of the same elements have:—

differentnumber of neutrons

●The nucleus of an atom of every element will alwayscontain: —

Protons

The properties of an element mostly corresponds tothat isotope which has greater:—

relativeabundance

●Isotopes differ in: —

properties which depend uponmass

●Under what conditions the gases deviate from theideal behavior?—

Low temperature and Highpressure

●The introduction of Kelvin scale in thermometry isaccording to:—

Charles law

●0.5 mole of nitrogen gas and 0.5 mole of carbonmonoxide gas at STP have same:—

Mass andAtoms

●At constant temperature the pressure of an ideal gasis doubled its density becomes:—

Double

●The diffusion of gases at absolute zero will be:—

Zero

●Critical temperature for different gases is differentand depends upon: —

Size of molecule, Shape ofmolecule and Intermolecular attractions

●What is the simplest form of matter?—

Gas

●What is the abundant form of matter on earth?—

Solid

●Which state of matter has the lowest density?—

Gas

●What do we call to sudden expansion of plasma? —

Joule Thompson effect

●One mole of an ideal gas at 546.5 K under 2 atmpressure has a volume of:—

22.414 dm3

●The solid particles only possess:—

Vibrational motion

●If 1/V is plotted on X-axis and pressure on Y-axis atconstant temperature what should appear:—

Straight line

●The partial pressure exerted by the water vapours iscalled: —

Aqueous tension

●The spreading of fragrance or scent in air is due to:—

Diffusion

●The kinetic molecular theory of gases was putforward in 1738 by:—

Bernoulli

●The highest temperature at which a substance canexist as a liquid is called its:—

Criticaltemperature

●What will be the pressure of 1 mole of an ideal gasmaintained at 300 K and 250cm3 volume?—

98.5atm

●The processes of effusion and diffusion are bestunderstand by:—

Graham's law

●Who made volume and pressure correction to explaindeviation of gases from ideal behaviour?—

Vander Waal

●The non-ideal behaviour results chiefly from:—

Intermolecular attractions and finite volume

●The gases become non-ideal at: —

Low temperatureand high pressure

●Lind's method is employed for:—

Liquefaction ofgases

●The relative attraction of the nucleus for the electronsin a chemical bond is called:—

Electro negativity

●Which type of bond is formed by overlap of porbitals? —

Pi and Sigma

●The octet rule does not always hold for which of thefollowing elements?—

●Shielding effect across the period:—

Constant

●In O2 each oxygen atom is hybridized:—

sp2

●Molecular orbitals are filled according to: —

Auf bauprinciple, Hunds rule and Paulis Exclusionprinciple

●Measurement of the degree of polarity is:—

Dipolemoment

●A specie with maximum number of unpairedelectrons: —

NH-2

●Force responsible to hold atoms together in acompound is called:—

Bond

●Energy of atom in compound is: —

Lesser thanindividual

●An atom loses or gains electrons to:—

Gain stability,Form a bond and complete its outermost shell

●Energy required to remove electron from an atom: —

Ionization potential

●Ionization energy in a period generally:—

Increases

●Greater shielding effect corresponds to ionizationenergy value:—

Lesser

●Elements having high I.P values are:—

Non metals

●Energy released or absorbed when electrons areadded in atom is:—

Electron affinity

●In a period electronegativity from left to right:—

increases

●Ionic bond is produced after complete transfer of: —

Electrons

●Bond will be ionic when E.N difference of bondedatom is:—

Greater than 1.7

●Mostly ionic compound are produced in betweenelements of: —

IA, IIA and

●The Lewis acids are:—

Electron deficient

●Sharing of 1 electron pair by one specie forms: —

Coordinate covalent bond

●Angle in water molecule is:—

104.50

●The geometry of ammonia is:—

Trigonal Pyramidal

●Orbitals of same energy produced after mixing oforbitals of different energy are called:—

Degenerate orbitals

●The relationship between energy of a photon of lightand its frequency is given by:—

Planck'sQuantum Theory

●Splitting of spectral lines when atom is subjected tomagnetic field is called:—

Zeemans Effect

●The number of fundamental particles in an atom ofthe lightest isotope carbon are:—

●Increase in atomic number is observed during: —

Beta emission

●Free neutron changes into proton with the emissionof:—

Neutrino and Electron

RL CHEM 1 Flashcards

(305 cards)