A. 6
B. 8
C. 10
D. 12
CHEMICAL ENGINEERING
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
The chemical nature of an element is independent of_______________________?
A. Its atomic number
B. The number of protons or electrons present in it
C. The number of neutrons present in it
D. None of these
In general, the specific heats of aqueous solutions _____________ with increase in the concentration of the solute?
A. Increase
B. Decrease
C. Remain unchanged
D. None of these
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
Average molecular weight of air is about ____________________?
A. 21
B. 29
C. 23
D. 79
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. 2/3
B. 1/3
C. 1/2
D. 1/3 × (298/273)
An ideal gas can be liquefied, because ___________________?
A. Its molecular size is very small
B. Its critical temperature is more than 0°C
C. Forces operative between its molecules are negligible
D. It gets solidified directly without becoming liquid
With increase in temperature, the surface tension of water _____________________?
A. Increases
B. Decreases
C. Remain constant
D. Increases linearly