Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
For a gas, the relative molecular mass is equal to 2Y. What is Y?
The mas of the gas
The vapour density of the gas
The volume of the gas
The temperature of the gas
Correct answer is B
No explanation has been provided for this answer.
To what temperature must a gas 273 K be heated in order to double both its volume and pressure?
298 K
546 K
819 K
1092 K
Correct answer is D
No explanation has been provided for this answer.
3.7 dm3
11.2 dm3
22.4 dm3
33.6 dm3
Correct answer is B
1 mole of any gas has a volume of 22.4dm3 at STP, SO 1mole of propane = 44g = 22.4dm3
22g = ?
( 22 x 22.4)/ 44 = 11.2dm3
25 cm3 of methane
40 cm3 of hydrogen
50 cm3 of ammonia
100 cm3 of chlorine
Correct answer is C
No explanation has been provided for this answer.
over a wide range of temperature
over a narrow range of temperature
at a lower temperature than the impure one
at the same temperature as the impure one
Correct answer is B
No explanation has been provided for this answer.