JEE Main 2018 (Online) 15th April Morning Slot | Thermodynamics Question 168 | Chemistry

An ideal gas undergoes a cyclic process as shown in Figure.

JEE Main 2018 (Online) 15th April Morning Slot Chemistry - Thermodynamics Question 174 English

JEE Main 2018 (Online) 15th April Morning Slot Chemistry - Thermodynamics Question 174 English

$$\Delta $$U_BC = $$-$$5 kJ mol^-1, q_AB = $$2$$ kJ mol^-1, W_AB = $$-$$5 kJ mol^-1, W_CA = 3 kJ mol^-1. Heat absorbed by the system during process $$CA$$ is :

$$-$$5 kJ mol^-1

+5 kJ mol^-1

18 kJ mol^-1

$$-$$18 kJ mol^-1

JEE Main 2018 (Online) 15th April Morning Slot

MCQ (Single Correct Answer)

-1

For which of the following reactions, $$\Delta $$H is equal to $$\Delta $$U?

N₂(g) + 3H₂(g) $$ \to $$ 2NH₃(g)

2HI(g) $$ \to $$ H₂(g) + I₂(g)

2NO₂(g) $$ \to $$ N₂O₄(g)

2SO₂(g) + O₂(g) $$ \to $$ 2SO₃(g)

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is 5 J and 8 J, respectively. Now gas is brought back to A by another process during which 3 J of heat is evolved. In this reverse process of B to A :

10 J of the work will be done by the gas.

6 J of the work will be done by the gas.

10 J of the work will be done by the surrounding on gas.

6 J of the work will be done by the surrounding on gas.

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

An ideal gas undergoes isothermal expansion at constant pressure. During the process :

enthalpy increases but entropy decreases.

enthalpy remains constant but entropy increases.

enthalpy decreases but entropy increases.

Both enthalpy and entropy remain constant.