JEE Main 2017 (Offline) | Thermodynamics Question 175 | Chemistry

If 100 mole of H₂O₂ decompose at 1 bar and 300 K, the work done (kJ) by one mole of O₂(g) as it expands against 1 bar pressure is :

2H₂O₂(l) $$\rightleftharpoons$$ 2H₂O(l) + O₂(g)

(R = 8.3 J K ^$$-$$1 mol^$$-$$1)

62.25

124.50

249.00

498.00

JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

The plot shows the variation of −$$ln$$ K_p versus temperature for the two reactions.

M(s) + $${1 \over 2}$$ O₂(g) $$ \to $$ MO(s) and

C(s) + $${1 \over 2}$$ O₂(g) $$ \to $$ CO(s)

JEE Main 2016 (Online) 9th April Morning Slot Chemistry - Thermodynamics Question 163 English

JEE Main 2016 (Online) 9th April Morning Slot Chemistry - Thermodynamics Question 163 English

Identify the correct statement :

At T > 1200 K, carbon will reduce MO(s) to M(s).

At T < 1200 K, the reaction

MO(s) + C(s) $$ \to $$ M(s) + CO(g) is spontaneous.

At T < 1200 K, oxidation of carbon is unfavourable

Oxidation of carbon is favourable at all temperatures.

JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

A reaction at 1 bar is non-spontaneous at low temperature but becomes spontaneous at high temperature. Identify the correct statement about the reaction among the following :

Both $$\Delta $$H and $$\Delta $$S are negative.

Both $$\Delta $$H and $$\Delta $$S are positive.

$$\Delta $$H is positive while $$\Delta $$S is negative.

$$\Delta $$H is negative while $$\Delta $$S is positive.

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