31
A reduction process is accompanied with increase in the
A)
Number of electrons
B)
Oxidation number
C)
Both A & B
D)
Neither A nor B
Answer & Solution
Answer: Option
A
32
In physical adsorption, as compared to chemisorption, the
A)
Quantity adsorbed per unit mass is higher
B)
Rate of adsorption is controlled by the resistance to surface reaction
C)
Activation energy is very high
D)
Heat of adsorption is very large
Answer & Solution
Answer: Option
A
33
Pick out the wrong unit conversion of calorific value.
A)
1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg
B)
1 BTU/ft3 = 8.9 kcal/m3 = 0.038 MJ/m3
C)
1 BTU/lb = 2.3 kcal/kg
D)
1 kcal/m3 = 0.1124 BTU/ft3
Answer & Solution
Answer: Option
C
34
What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C?
A)
$$\frac{2}{3}$$
B)
$$\frac{1}{3}$$
C)
$$\frac{1}{2}$$
D)
$$\frac{1}{3} \times \frac{{273}}{{298}}$$
Answer & Solution
Answer: Option
B
35
For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.
A)
Integral
B)
Differential
C)
Both A & B
D)
Neither A nor B
Answer & Solution
Answer: Option
C
36
The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.
A)
Less
B)
More
C)
Same
D)
Either A or B; depends on the nature of the substance
Answer & Solution
Answer: Option
C
37
If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will
A)
Remain unaltered
B)
Increase nine fold
C)
Increase three fold
D)
Decrease three fold
Answer & Solution
Answer: Option
B
38
For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.
A)
Sodium chloride
B)
Sodium carbonate monohydrate
C)
Anhydrous sodium sulphate
D)
Hypo
Answer & Solution
Answer: Option
A
39
Dry air is a mixture of
A)
Vapors
B)
Gases
C)
Both A & B
D)
Neither A nor B
Answer & Solution
Answer: Option
B
40
The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the
A)
Relative humidity
B)
Relative saturation
C)
Percentage saturation
D)
None of these
Answer & Solution
Answer: Option
C
