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# States of Matter – Chemistry | NEET Online Mock Test

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States of Matter - NEET (Chemistry)

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1 / 50

Calculate the pressure to be increased in order to decrease the volume of a gas by 5% at a constant temperature

2 / 50

Find the incorrect one from the following graph:

3 / 50

A vessel contains O2 and H2 in 28 : 13 molar ratio at 100 atm pressure. Then calculate ratio of their rate of diffusion.

4 / 50

A vessel contains equal amount of oxygen and carbon monoxide at 10 atm. Calculate the partial pressure of O2 under similar condition

5 / 50

Calculate the number of atoms present in 11.2 L NH3 at 273oC and 2 atm

1. 6.022 x 1023
2. 2 x 6.022 × 1023
3. 4 x 6.022 x 1023
4. 1/2 x 6.022 x 1023

6 / 50

Select the correct statement from the following according to the kinetic molecular theory of gases

7 / 50

The average speed of an ideal gas molecule of 27°C is 1.75 ms-1. Calculate average speed at 927°C

1. 0.6 ms-1
2. 1.75 ms-1
3. 3.5 ms-1
4. 7.0 ms-1

8 / 50

Vander Waal equation for He is: Where a,b are Vander Waal's constant

9 / 50

Under which of the following set of conditions is a real gas expected to deviate from ideal behaviour to the maximum extend ?

10 / 50

The critical temperature of O2 is less than H20 because the H2O molecule have

11 / 50

The correct order of temperature of a real gas is :

a) Inversion temperature

b) Critical temperature

c) Inversion temperature

1. a > b >c
2. c > a > b
3. a > c > b
4. b > a > c

12 / 50

For an ideal gas at constant P and fixed number of moles, which of the following graph is correct ?

13 / 50

At 1 atm and 273 K the density of gas whose molecular weight is 45, is-

14 / 50

A 4: 1 molar mixture of He and CH4 is contained in a vessel at 20 bar pressure. Due to a hole in the
vessel, the gas mixture leaks out. Find the composition of the mixture effusing out initially

15 / 50

Total kinetic energy of 8 gm He gas at 27°C is

16 / 50

Find the temperature at which most probable speed of SO2 molecules have the same value of root mean square speed of O2 molecule at 300 K

17 / 50

18 / 50

The avarage Kinetic Energy of four moles of N2 gas at 127oC is (R = 2 cal mole-1K-1)

19 / 50

The correct order of value of 'a' for different gases is

1. Ar < CO < N2
2. CH4 < NH3 < SO2
3. NH < Cl2 < HCI
4. SO2 < CO2 < H2

20 / 50

Temperature at the foot of a mountain is 30°C and pressure is 760 mm of µg whereas at the top of the mountain, these are 0°C and 710 mm. Compare the densities of the air at the foot and at the top of the mountain

21 / 50

127ml of a certain gas diffuses at the same time as 100ml of chlorine under same condition. Calculate the Molecular mass of the gas

22 / 50

2.8g of N2 gas is kept in 1-litre flask at 0°C Calculate the pressure exerted by the gas

23 / 50

A graph is plotted pressure (P) versus the Temperature (T) of a gas at a given volume (V). What is the correct relationship among V1, V2, V3 & V4?

24 / 50

The correct order of liquefaction of gases are

1. NH3 > CO2 > HCI > SO2
2. CO2 > NH3 > SO2 > HCI
3. HCI > CO2 > NH3 > SO2
4. SO2 > NH3 > HCI > CO2

25 / 50

If real gas molecules are assumed to have no volume, then at room temperature and pressure vander Waal's gas equation can be written as

26 / 50

Correct relationship between T₁, T₂ and T3 is

1. T1 > T₂> T3
2. T₂ > T3 > T₁
3. T3 > T₂ > T₁
4. T₁ > T3 > T₂

27 / 50

For which of the following gas critical temperature would be the highest

1. NH3
2. H2
3. N2
4. CH4

28 / 50

Density of N2 at 27°C temperature and 1atm pressure is

29 / 50

The average kinetic energy of an ideal gas per molecule at 25°C will be

1. 3.8×10-20J
2. 6.17×10-21J
3. 7.46×10-19J
4. 8.32×10-21J

30 / 50

If the temperature changes from 16°C to 127°C, the relative percentage change in rms velocity would be

31 / 50

Which of the following gas can be easily liquified?

1. NH3
2. CO2
3. N2
4. O2

32 / 50

Which of the following has the maximum surface tension?

33 / 50

At Boyle's temperature for long range of pressure compressibility factor 'Z' for a real gas is

1. Z = 0
2. Z > 1
3. Z < 1
4. Z = 1

34 / 50

At what temperature is the kinetic energy of a gas molecule half of its value at 327°C

35 / 50

The most probable velocity of O2 at 27°C is

36 / 50

Which of the following shows positive deviation from ideal gas behaviour at 273 K?

1. N2
2. CO2
3. CH4
4. He

37 / 50

Which of the following gases will have the highest rate of diffusion at STP?

1. SO2
2. O3
3. Cl2
4. C3H6

38 / 50

Which of the following order of pressure is correct?

1. P1 = P2 = P3
2. P1 > P2 > P3
3. P1 < P2 < P3
4. P1 > P2 < P3

39 / 50

The density of oxygen is 1.4 gm/l at STP. The density of oxygen at 47°C and 800 torr is

40 / 50

The ratio of the root mean square velocity of He at 50K to that of SO2 at 800K is

41 / 50

The correct order of van der Wall constant (b) is

1. N2 > O2 > He > Cl2
2. Cl2 > N2 > O2 > He
3. O2 > N2 > Cl2 > He
4. He > O2 > N2 > Cl2

42 / 50

Correct order of surface tension of given compound is

1. Ethanol > glycerol > glycol
2. Glycerol > ethanol > glycol
3. Glycol > glycerol > ethanol
4. Glycerol > glycol > ethanol

43 / 50

2 moles of an ideal gas (monoatomic) is subjected to isothermal compression upto half of its initial volume and then allowed to undergo isothermal expansion upto 2/3rd of its original volume. The value of △U (change in internal energy) in the entire process is

44 / 50

Which of the following relation is/are correct for the critical constants

1. Pc = a/27b
2. Tc = 8a/27Rb
3. Vc = 3b
4. Both (2) and (3)

45 / 50

Vapour pressure of water is dependent on

46 / 50

The Correct unit of surface tension is

1. Nm-1
2. Nm-2
3. Nsm-2
4. All of these

47 / 50

Pressure correction term in the van der Waal's equation for 1 mole of a gas is

1. (a/V2)
2. (b/V2)
3. (b/V)
4. (a/V)

48 / 50

The ratio of the r.m.s. velocity of H2 at 50 K to that of O2 at 800 K is

49 / 50

If equal masses of methane and hydrogen are mixed in a container at 25°C, then the fraction of the total pressure exerted by hydrogen is

50 / 50

The molecular weight of a gas that diffuses twice as rapidly as the gas with molecular weight 32 is