chemistry

Question 1

chromium

Answer 1

52

Question 1

zinc

Answer 1

63

Question 2

iron

Answer 2

56

Question 3

bromine

Answer 3

80

Question 4

position of atoms in molecular crystals determined by

Answer 4

xray analysis

Question 5

Bohrs model

Answer 5

electron at a specifc distance
and a specific velocity from nucleus

Question 6

Heinsberg uncertainty principal

Answer 6

impossible to determine electron momentum and position

Question 7

hardest solid

Answer 7

covalent

Question 8

nacl and diamond

Answer 8

cubic

Question 9

arheinus equation is an equation of

Answer 9

straight line

Question 10

platinum foil in SHE acts as?

Answer 10

catalyst

Question 11

Cu+2e

Answer 11

+0.34

Question 12

more ionising potential

Answer 12

less ability to form cations

Question 13

interstitial compounds formed when

Answer 13

transition elements react w C, H, N, O, B

Question 14

Coinage metals; Group IB

Answer 14

gold silver copper

Question 15

water waves

Answer 15

longitudinal and transverse

Question 16

in f modulation

Answer 16

amplitude doesnt change

Question 17

perrie currie and marrie curie

Answer 17

isolated radium

Question 18

process of effusioin best explained by

Answer 18

grahams law

Question 19

C in steel

Answer 19

0.2-0.7%

Question 20

extent of unsaturation expressed by its

Answer 20

iodine no

Question 21

diamond

Answer 21

sharp mp

Question 22

Hb made up of

Answer 22

10k atoms

Question 23

in isotopic analysis pressure of vapours is around

Answer 23

10-7 torr

Question 24

benzoic acid

Answer 24

can be purified by sublimation

Question 25

in process of respiration

Answer 25

application of daltons law

Question 26

acronitryl

Answer 26

CH2=CH-CN

Question 27

Manufacture of plastics

Answer 27

carbonic acid

Question 28

micronutrients required

Answer 28

6-200g per acre

Question 29

incarnation can reduce the vol of h20 by

Answer 29

2/3rd

Question 30

chromyl test

Answer 30

confirms presence of chlorine

Question 31

L-asparaginase

Answer 31

treatment of blood cancer

Question 32

separation and purification of carbonyl and non carbonyl compounds

Answer 32

NaHSO3

Question 33

radon

Answer 33

alpha gas emitter

Question 34

Catalyst for Catalytic cracking

Answer 34

SiO2 & Al2O3

Question 35

non stick lining of pans

Answer 35

tetrafluoroethane

Question 36

mass of 1g of e-

Answer 36

9.8x10"28

Question 37

gas produced from landfills of waste

Answer 37

methane

Question 38

human blood ph

Answer 38

7.35-7.40

Question 39

ionic radii of flouride

Answer 39

136pm

Question 40

anhydride of sulfuric acid

Answer 40

sulfur (III) oxide

Question 41

picric acid

Answer 41

1,3,6 trinitrophenol

Question 42

Grahams Law

Answer 42

the rate of effusion a gas is inversely proportional to the square root of its molar mass

Question 43

ratio of sigma to pi bonds in benzene

Answer 43

4:1

Question 44

freon

Answer 44

refrigerant

Question 45

neopentyl chlorides belong to

Answer 45

primary alkyl hallides

Question 46

phenol and formaldehyde forms

Answer 46

adduct

Question 47

effusion vs diffusion

Answer 47

Effusion, in simple terms, is the ability of gas to travel through a small opening. Diffusion is the ability of gases to mix with each other, usually without a barrier

Question 48

coinage metals

Answer 48

1B

Question 49

carbon forms interstitial compounds

Question 50

AL extracted by

Answer 50

bauxite

Question 51

jupon burning in air normal oxide formed by

Answer 51

Li

Question 52

covalent radius of H2

Answer 52

37.7pm

Question 53

glucose to ethanol

Answer 53

zymase enzyme

Question 54

optimum temp for fermentation

Answer 54

25-35 degree celcius

Question 55

principal quantum number n represents

Answer 55

size of an orbital, energy and location of electron

Question 56

abnormal trend in IE of

Answer 56

group 3A & 6A

Question 57

H bond in HF

Answer 57

zigzag manner

Question 58

in habers process

Answer 58

35% ammonia at equilibrium

Question 59

friedrich reinitzer

Answer 59

discovered liquid crystal

Question 60

3rd order reactions

Answer 60

half life is inversely proportional to square of concentration

Question 61

Enthalpy of solution of NH4Cl

Answer 61

16.2

Question 62

alkyl halides give

Answer 62

beta elimination reactions

Question 63

daltons theory

Answer 63

atom cannot be further divided

Question 64

alkaline phosphatase

Answer 64

raised in rickets

Question 65

BP of acetic acid

Answer 65

118

Question 66

zinc oxide and chromium oxide is used in

Answer 66

industrial prep of CH3OH