If heat given to a system is 6 kcal and work done is 6 kJ. Then the change in internal energy is :

(1) 19.1 kJ

(2) 12.5 kJ

(3) 25 kJ

(4) Zero

Concept Questions :-

First law of thermodynamics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A monoatomic gas of n-moles is heated from temperature T1 to T2 under two different conditions (i) at constant volume and (ii) at constant pressure. The change in internal energy of the gas is

(1) More for (i)

(2) More for (ii)

(3) Same in both cases

(4) Independent of number of moles

Concept Questions :-

Basic terms
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Can two isothermal curves cut each other

(1) Never

(2) Yes

(3) They will cut when temperature is 0°C

(4) Yes, when the pressure is critical pressure

Concept Questions :-

Types of processes
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Difficulty Level:

A vessel containing 5 litres of a gas at 0.8 m pressure is connected to an evacuated vessel of volume 3 litres. The resultant pressure inside will be (assuming whole system to be isolated)

(1) 4/3 m

(2) 0.5 m

(3) 2.0 m

(4) 3/4 m

Concept Questions :-

Types of processes
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

For an isothermal expansion of a perfect gas, the value of $\frac{\Delta P}{P}$ is equal -

(1) $-{\gamma }^{1/2}\frac{\Delta V}{V}$

(2) $-\frac{\Delta V}{V}$

(3) $-\gamma \frac{\Delta V}{V}$

(4) $-{\gamma }^{2}\frac{\Delta V}{V}$

Concept Questions :-

Types of processes
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If a gas is heated at constant pressure, its isothermal compressibility

(1) Remains constant

(2) Increases linearly with temperature

(3) Decreases linearly with temperature

(4) Decreases inversely with temperature

Concept Questions :-

Types of processes
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In isothermal expansion, the pressure is determined by -

(1) Temperature only

(2) Compressibility only

(3) Both temperature and compressibility

(4) None of these

Concept Questions :-

Types of processes
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The isothermal bulk modulus of a perfect gas at normal pressure is -

(1) $1.013×{10}^{5}N/{m}^{2}$

(2) $1.013×{10}^{6}N/{m}^{2}$

(3) $1.013×{10}^{-11}N/{m}^{2}$

(4) $1.013×{10}^{11}N/{m}^{2}$

Concept Questions :-

Types of processes
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In an isothermal change, an ideal gas obeys -

(1) Boyle's law

(2) Charle's law

(3) Gaylussac law

(4) None of the above

Concept Questions :-

Basic terms
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

An ideal gas A and a real gas B have their volumes increased from V to 2 V under isothermal conditions. The increase in internal energy

(1) Will be same in both A and B

(2) Will be zero in both the gases

(3) Of B will be more than that of A

(4) Of A will be more than that of B

Concept Questions :-

Types of processes