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.Management Sciences
Category: Stoichiometry
The total number of atoms in 8.5 gm of NH3 is _______________ × 1023?
0
A. 9.03
B. 3.01
C. 1.204
D. 6.02
S.T.P. corresponds to _________________?
A. 1 atm. absolute pressure & 15.5°C
B. 760 mm Hg gauge pressure & 15.5°C
C. 760 torr & 0°C
D. 101.325 kPa gauge pressure & 15.5°C
Kinematic viscosity of 1 m2 /second is equivalent to _____________ stokes?
A. 10
B. 102
C. 103
D. 104
Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?
A. RT
B. P + (a/V2)
C. (V – b)
D. 1/RT
Quartz is__________________?
A. Stable form of silica upto 870°C
B. Converted to Tridymite on firing between 870 to 1470°C
C. Transformed to Cristobalite on heating above 1470°C
D. All A., B. and C.
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
Addition of a non-volatile solute to a solvent produces a ______________ in its solvent?
A. Freezing point elevation
B. Boiling point depression
C. Vapor pressure lowering
D. All A., B. & C.
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
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