31) pH value of neutral solution is—
a) 8
b) 5
c) 7
d) 13
32) Acid reach with bases to give—
a) ester
b) Alcohol
c) Salt
d) None
33) If the vapour denisty of a gas is molecular mass will be—
a) 12
b) 16
c) 18
d) 28
34)The biocatalysts are—
a) Enzymes
b) Minerals
c) Plants
d) All proteins
35)Which fuel has the maximum calorific value—
a) Charcoal
b) Kerosene
c) Wood
d) Cow-dung
36)Which law of thermodynamics introduces the concept of entropy—
a) First law
b) Zeroth law
c) Third law
d) Second law
37)Which among the following has the highest ionization potential—
a) Li
b) B
c) Ne
d) F
38) The element that has the highest first ionization potential is—
a) Boron
b) Nitrogen
c) Oxygen
d) Carbon
39)The most powerful reducing agent is—
a) K
b) Ba
c) Na
d) Mg
40)Reverse of swelling of gel is known as—
a) Syneresis
b) Thixotropy
c) Sorption
d) None of these