Spontaneity & Entropy NCERT Solved Examples Based MCQs Thermodynamics Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

The incorrect statement(s) among the following statements is/are -

i.	When liquid crystallizes into a solid, entropy increases.
ii.	When the temperature of a crystalline solid is raised from 0 K to 115 K then entropy increases.
iii.	2 NaHCO₃ (s) →Na₂CO₃(s) +CO₂(g)+H₂O(g); Entropy increases.
iv.	H₂(g)→2H(g) ; Entropy decreases.

1. (i), (iv)
2. (ii), (iv)
3. (iii), (iv)
4. (i), (iii)

Subtopic: Spontaneity & Entropy |

82%

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For the oxidation of iron,

4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)
entropy change is -549.4 JK^-1 mol^-1 at 298 K.

( $∆_{r} H^{Θ}$ for this reaction is $- 1648 \times 10^{3} J m o l^{- 1}$ )

The reaction is-

1. Spontaneous reaction

2. Non-spontaneous reaction

3. Reaction is an equilibrium

4. Cannot predict

Subtopic: Spontaneity & Entropy |

75%

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