20
32.2
45.35
58.65
✅ The correct answer is option D.
Statiometery MCQs
62. A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
Saturated
Superheated
Unsaturated
Dry gaseous
✅ The correct answer is option B.
63. The amount of Zn (atomic weight = 65) required to form 224 c.c. of H₂ at N.T.P. on treatment with dilute H₂SO₄ will be __________ gm.
0.065
0.65
6.5
65
✅ The correct answer is option B.
64. Pick out the wrong unit conversion of heat transfer co-efficient.
1 kcal/m².hr.°C = 0.2048 BTU/ft².hr. °F. = 1.163 W/m².°K
1 kcal/m².hr.°K = 1.163 W/m².°C
1 W/m² . °C = 0.1761 BTU/ft².hr.°F
1 BTU/ft².hr.°F = 4.88 kcal/m².hr.°C = 20.44 kJ/m².hr°C = 5.678 W/m².°C
✅ The correct answer is option B.
65. How many phases are present at eutectic point?
1
2
3
Unpredictable
✅ The correct answer is option C.
66. Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.
Carbonate (monohydrate)
Chloride
Thiosulphate
Bisulphite
✅ The correct answer is option A.
67. An equation for calculating vapour pressure is given by, log10 P = A – B(t + c). This is called the
Kistyakowsky equation
Antonic equation
Kopp’s rule
Trouton’s rule
✅ The correct answer is option B.
68. The pressure of ‘V’ litres of a dry gas is increased from 1 to 2 kgf/cm² at a constant temperature. The new volume will become
V/2
2V
V/4
V²
✅ The correct answer is option A.
69. The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.
Less
More
Same
Either A or B; depends on the nature of the substance
✅ The correct answer is option C.
70. The number of H⁺ in 1 c.c solution of pH 13 is
6.023 xl0¹³
6.023 x 10¹⁰
6.023xl0⁷
10¹³
✅ The correct answer is option C.