Oxygen is present in 1-litre flask at a pressure of 7.6× 1010 mmHg.The number of oxygen molecules in the flask at 0 ºC is -

1. 2.686 × 1010                            

2. 26.86 × 1010

3. 0.626 × 1012                            

4. 4.123 × 108

Subtopic:  Ideal Gas Law |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The critical temperature and critical pressure of a gas obeying van der Waals’ equation are 30ºC and 73 atm respectively. Its van der Waals’ constant, b in litres mol-1 is, therefore

1. 0.500                                 

2. 0.060

3. 0.265                                 

4. 0.043

Subtopic:  Liquefaction of Gases & Liquid |
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

A closed vessel contains equal number of oxygen and hydrogen molecules. Consider the following statements:

1. The average speed of hydrogen molecules is greater.

2. The two gases have different average energies.

3. Hydrogen molecules strike the walls more often.

4. Weight of hydrogen is 18th of the weight of oxygen.

Wrong statements are –

(A) 1 and 2                       

(B) 2 and 3

(C) 1 and 3                       

(D) 2 and 4

Subtopic:  Kinetic Theory of Gas |
 57%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

SO3(g) decomposes according to the equation

2SO3g             2SO2g+O2g

A sealed container contains 0.5 mol of SO3 gas at 100°C and 2 atm pressure. What would be the pressure in the container if the SO3 gas is decomposed completely according to the above equation and the temperature were maintained at 100°C –

(A) 0.5 atm                             

(B) 1.0 atm

(C) 2.0 atm                             

(D) 3.0 atm

Subtopic:  Ideal Gas Law |
 52%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A general form of equation of state for gases is PV=RT A+BV+CV2+........, where V is the molar volume of the gas and A, B, C, ........... are constant for the gas. The values of A and B, if the gas obeys van der Waals' equation, are respectively.

(1) aRT, b                                     

(2) 2aRT, b

(3) 1, b-aRT                               

(4) 1, a27 b

Subtopic:  van der Waal’s Correction |
 55%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The mean free path of gas A, with molecular diameter equal to 4 Å, contained in a vessel, at a pressure of 106 torr, is 6990 cm. The vessel is evacuated and then filled with gas B, with molecular diameter, equal to 2 Å, at a pressure of 103 torr, the temperature remaining the same. The mean free path of gas B will be

(A) 28 cm                       

(B) 280 cm

(C) 7 cm                         

(D) 14 cm

Subtopic:  Kinetic Theory of Gas |
 53%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which of the following curves does not represent Boyle's Law

 

(1) 

(2) `

(3) 

(4) 

Subtopic:  Gas Laws |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

If the pressure of a given mass of gas is reduced to half and temperature is doubled simultaneously, the volume will be

(1) Same as before                                   

(2) Twice as before

(3) Four time as before                               

(4) One fourth as before

Subtopic:  Ideal Gas Law |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The critical volume of a gas is 0.072 lit. mol1. The radius of the molecule will be , in cm

1. 34πx10-2313                           

2. 4π3x10-2313

3. 3π4x10-2313                           

4. 34πx10-8

Subtopic:  Liquefaction of Gases & Liquid |
 68%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

32 gm of oxygen and 3 gm of hydrogen are mixed and kept in a vessel to 760 mm pressure and 0ºC. The total volume occupied by the mixture will be nearly

(1) 22.4 lit.                               

(2) 33.6 lit

(3) 56 lit                                   

(4) 44.8 lit

Subtopic:  Gas Laws |
 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh