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

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.

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.

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