The number of molecules present in 1 mL of gas or vapour at STP is:

(1) called Loschmidt's number

(2) equal to 2.617 x 1019 per mL

(3) both (a) and (b)

(4) none of the above

Subtopic:  Gas Laws |
 87%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

600 cc of a gas at a pressure of 750 mm is compressed to 500 cc. Taking the temperature to remain constant, the increase in pressure is                                           

(a) 150 mm                       (b) 250 mm

(c) 350 mm                       (d) 450 mm

Subtopic:  Gas Laws |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

An ideal gas expands according to PV=constant. On expansion, the temperature of gas:

(1) will rise

(2) will drop

(3) will remain constant

(4) cannot be determined because the external pressure is not known

Subtopic:  Gas Laws |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The compressibility of a gas is less than unity at STP. Therefore:

(1) Vm > 22.4 litre                           

(2) Vm < 22.4 litre

(3) Vm = 22.4 litre                           

(4) Vm = 44.8 litre

Subtopic:  Compressibility Factor |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

The numerical value of Cp-Cv for one mole of the ideal gas is equal to:

1. R             

2. R/M

3. M/R         

4. None of the above

Subtopic:  Kinetic Theory of Gas |
 81%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In which case is the rate of diffusion highest if all are present in the same container at the same temperature:

1. 4 g H2

2. 32 g O2

3. 22 g CO2

4. 56 g N2

Subtopic:  Graham's Law |
 73%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Partial pressure of Hydrogen in Flask containing 2 gm of H2 and 32 gm of SO2 is 

1. 1/16 of total pressure

2. 1/2 of total pressure

3. 2/3 of total pressure

4. 1/8 of total pressure

Subtopic:  Ideal Gas Law |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

At high pressure, the compressibility factor 'Z' is equal to -

1.  Unity

2. 1-PbRT
3. 1+PbRT

4.  Zero

Subtopic:  Compressibility Factor | van der Waal’s Correction |
 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The density of O2(g) is maximum at:-

1. STP

2. 273 K and 2 atm 

3. 546 K and 1 atm

4. 546 K and 2 atm

Subtopic:  Gas Laws |
 67%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

A gas diffuses four time quickly as oxygen. The molecular weight of gas is:

1. 2

2. 4

3. 8

4. 16

Subtopic:  Graham's Law |
 78%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints