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

States of Matter Practice test-2

Question No:1
If the pressure and the absolute temperature of a given mass of gas are doubled, the new volume will be……………..of the initial volume.

[A] Double
[B] Half
[C] Triple
[D] Same




Question No:2
A gaseous mixture contains 56 g of N2, 44 g of CO2. and 16 g ol CH4 The total pressure of the mixture is 720 mmHg The partial pressure of CH4 is

[A] 180 mm
[B] 360 mm
[C] 540 mm
[D] 720 mm




Question No:3
The correct gas equation is

[A] \( \frac{P_1T_1}{V_1}\)=\( \frac {P_2T_2}{V_2}\)

[B] \( \frac{V_1T_2}{P_1}\)=\( \frac {V_2T_1}{P_2}\)

[C] \( \frac{P_1V_1}{P_2V_2}\)=\( \frac {T_1}{T_2}\)

[D] \( \frac{V_1V_2}{T_1T_2}\)=\( {P_1P_2}\)





Question No:4
Dalion’s law of partial pressure is not applicable to

[A] O2 + O3
[B] CO + CO2
[C] NH3+HCl
[D] I + O2




Question No:5
In the equation of a state of an ideal gas PV= nRT, the value of the universal gas constant would depend only on

[A] the value of the gas
[B] tlie pressure of ihe gas
[C] the units of the measurement
[D] None of the above




Question No:6
Assertion (A): At 300 K. kinetic energy of 16 g of methane is equal to the kinetic energy of 32 g of oxygen.
Reason (R): At constant temperature, the kinetic energy of one mole of all gases is equal.

[A] Both A and R are true and R is the correct explanation of A.
[B] Both A and R are true but R is not the correct explanation of A.
[C] A is true but R is false.
[D] Both A and R are false




Question No:7
Assertion (A): H2 and Cl2 enclosed separately in the same vessel exert a pressure of 100 and 200 mm respectively. Their mixture in the same vessel at the same temperature will exert a pressure of 300 mm.
Reason (R): Dalton’s law of partial pressure states that total pressure is the sum of partial pressures.

[A] Both A and R are true and R is the correct explanation of A.
[B] Both A and R are true but R is not the correct explanation of A.
[C] A is true hut R is false.
[D] Both A and R are tales




Question No:8
By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?

[A] 2
[B] 2.8
[C] 4
[D] 1.4




Question No:9
One mole of oxygen at 273 K and one mole of SO2 at 546 K are taken in two separate containers, then

[A] K.E. of O2 > K.E.of SO2
[B] K.E of O2 < KE of SO2
[C] K.E. of both are equal
[D] None of the above




Question No:10
Different gases at the same temperature have same

[A] Pressure
[B] No. of moles
[C] Volume
[D] Average Kinetic Energy.




Question No:11
If temperature of one mole gas is increased by 50℃, then calculate the change in kinetic energy of the system.

[A] 623.25 J
[B] 6.235 J
[C] 623.5 J
[D] 6235.0 J




Question No:12
Which one of the following statements is not correct about the effect of an increase in temperature of the distribution of molecular speeds in a gas?

[A] The area under the distribution curve remains the same as under the lower temperature.
[B] The distribution becomes broader.
[C] The fraction of the molecules with the most probable speed increases.
[D] The most probable speed increases.




Question No:13
The root mean square speed of an ideal gas at constant pressure varies with density d as

[A] d2
[B] d
[C] \( \sqrt{d}\)
[D] \( \frac{1}{\sqrt{d}}\)




Question No:14
Which one of the following statements is not true about the effect of an increase in temperature on the distribution of molecular speeds of gas?

[A] The most probable speed increases
[B] The fraction of the molecules with most probable speed increases.
[C] The distribution becomes broader.
[D] The area under the distribution curve remains the same as under the low temperature.




Question No:15
The rms speed of hydrogen is \( \sqrt{7}\) times the rms speed of nitrogen. It T is the temperature of the gas, then:

[A] TH2=TN2
[B] TH2>TN2
[C] TH2 < TN2
[D] TH2=\( \sqrt{7}\)TN2