NCERT Class11 chemistry NEET Objective Questions,PDF,Tests,Solutions

States of Matter Practice test-1

Question No:1
Dipole induced-dipole interactions are present in which of the following pairs?

[A] HCl and He atoms
[B] SF4 and He atoms
[C] H2O and alcohol
[D] Cl2 and CCl4

Question No:2
The interaction energy of London forces is

[A] directly proportional to r6
[B] inversely proportional to 1/r6
[C] inversely proportional to r3
[D] inversely proportional to 1/r3

Question No:3
Which one of the following options is/are correct?

[A] intennolecular forces tend to keep the molecules together.
[B] Thermal energy of the molecules tends to keep them apart
[C] Both of the above
[D] None of the above

Question No:4
The interaction between a polar and non-polar molecule is known as

[A] Dipole-induced dipole interaction
[B] Dipole Dipole interaction
[C] Ion dipole interaction
[D] None of the above

Question No:5
Energy of hydrogen bond varies between

[A] 10 to 100 kJ mol-1
[B] 10 to 50 kJ mol-1
[C] 100 to 150 kJ mol-1
[D] 100 to 200 kJ mol-1

Question No:6
A certain gas takes three times as long to effuse out as helium. Its molecular mass will be

[A] 27 g mol-1
[B] 36 g mol-1
[C] 6 g mol-1
[D] 9 g mol-1

Question No:7
100 ml O2 and H2 are kept at same temperature and pressure. What is true about their number of molecules?

[A] NO2 > NH2
[B] NO2 > NH2
[C] NO2= NH2
[D] NO2 + NH2 = 1 mole

Question No:8
Equal masses of He, O2 and SO2 are taken in a closed container. The ratio of the partial pressures of gases He, O2 and SO2 would be

[A] 16:2:1
[B] 1:4:16
[C] 16:8:1
[D] 1:2:8

Question No:9
Dimension of universal gas constant R is

[A] VPT-1n-1
[B] VP-1Tn-1
[C] VPTn-1
[D] VPT-1n

Question No:10
A bubble of air is underwater at temperature 15℃ and the pressure 1.5 bar of the bubble rises to the surface where the temperature is 25℃ and the pressure is 1.0 bar, what will happen to the volume of the bubble?

[A] Volume will become greater by a factor of 1.6
[B] Volume will become greater by a tact or of 1.1
[C] Volume will become smaller by a factor of 0.70
[D] Volume will become greater by a factor of 2.5

Question No:11
A and B are Ideal gases. 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/5
[B] P/2
[C] P/2.5
[D] 3P/4

Question No:12
A mixture contains 16 g of oxygen, 28 g of nitrogen and 8 g of CH4. Total pressure of mixture is 740 mm. What is the partial pressure of nitrogen in the mixture?

[A] 185 mm
[B] 370mm
[C] 555 mm
[D] 740mm

Question No:13
A given mass of a gas obeys Boyle’s law at a certain temperature.Which one of the plots will not give a straight line?

[A] V versus 1/P
[B] P versus 1/V
[C] log P versus log V
[D] P versus V

Question No:14
Which of the following is a representation of Charles’ law?

[A] P1T1=P2T2
[B] P1T2=P2T2
[C] P1V1=P2V2
[D] V1T2=V2T1

Question No:15
A sample of gas has a volume of 0.2 L measured at 1 atm pressure and 0℃. At the same pressure but at 273℃, its volume becomes

[A] 0.1 L
[B] 0.4 L
[C] 0.8 L
[D] 0.6 L

Question No:16
Equal masses of methane and oxygen introduced into a vessel at 27℃.
What fraction of the total pressure is due to oxygen?

[A] \(\frac{1}{10}\)
[B] \(\frac{1}{2}\)
[C] \(\frac{1}{3}\)
[D] \(\frac{1}{4}\)

Question No:17
If 10-4 dm3 of water is introduced into a 1 dm3 flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established
(given, vapour pressure of H2O at 300 K is 3170 Pa; R = 8.314 JK-1mol-1)?

[A] 5.56×10-6mol-1
[B] 1.53×10-2mol-1
[C] 4.46×10-2mol-1
[D] 1.27×10-3mol-1