States of Matter MCQs | Question – Paper 2

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Topic: States of Matter - Gases and Liquids, Test No.: 02, Total MCQs: 10

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Question 1
Hydrogen diffuses six times faster than gas A. The molar mass of gas A is:
A
24
B
36
C
72
D
96
Question 2
‘n’ mole of an ideal gas at temperature T (in Kelvin) occupy “V” litres of volume, exerting a pressure of ‘P’ atmospheres. What is its concentration (in mole.lit)? (R = gas constant)
A
P/RT
B
PT/R
C
RT/P
D
R/PT
Question 3
10g each of CH4 and O2 are kept in cylinders of same volume under same temperatures, give the pressure ratio of two gases.
A
2 : 1
B
1 : 4
C
2 : 3
D
3 : 4
Question 4
138 grams of ethyl alcohol is mixed with 72 grams of water. The ratio of mole fraction of alcohol to water is
A
3 : 4
B
1 : 2
C
1 : 4
D
1 : 1
Question 5
4 gms of an ideal gas occupies 5.6035 liters of volume at 546K and 2atm pressure. What is its molecular weight?
A
4
B
16
C
32
D
64
Question 6
7.5 grams of a gas occupy 5.6 litres of volume at STP. The gas is (Atomic weights of C, N and O are 12, 14 and respectively)
A
NO
B
N2O
C
CO
D
CO2
Question 7
A and B are ideal. The molecular weights of A and B are in the ratio of 1:4. The pressure of a gas mixture containing equal weights of A and B is P atm. What is the partial pressure (in atm) of B in the mixture?
A
P/2.5
B
P/2
C
P/5
D
3P/4
Question 8
A certain mass of a gas occupies a volume of 2 litres at STP. To what temperature the gas must be heated to double its volume, keeping the pressure constant?
A
100 k
B
273 k
C
273°C
D
546°C
Question 9
A gas deviates from ideal behaviour at a high pressure because its molecules
A
attract one another
B
show the Tyndall effect
C
have kinetic energy
D
are bound by covalent bonds
Question 10
'a' and 'b' are van der Waals' constants for gases. Chlorine is more easily liquefied than ethane because
A
a for Cl2 > a for C2H6 but b for Cl2 < b for C2H6
B
a for Cl2 < a for C2H6 but b for Cl2 > b for C2H6
C
a and b for Cl2 > a and b for C2H6
D
a and b for Cl2 < a and b for C2H6
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