Thermodynamics MCQ Question with Answer

Thermodynamics MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 8
If temperature is kept constant during the reaction, the process is said to be.......................

none of above

Question No : 9
The factor that does not influence the heat of reaction is...

method by which reactants change to products
chemical state of the reactants and products
whether it is taking place at constant temperature
All the above

Question No : 10
The solution energy of AI+++ion is more than that of Mg+++ due to...

high ionisation energy of AI+++ ion
greater size of AI+++ ion
greater charge on AI+++ ion
small size of AI+++ ion

Question No : 11
1 Joule is equal to

2.39 Cal
0.04184 Cal
1.390 Cal
0.239 Cal

Question No : 12
Heat of combustion of methane and ethane are -291.7 Kcal & — 441.2 Kcal respectively:

Methane is a better fuel because ethane is poisonous
Methane is a better fuel than C2H6
Ethane is a better fuel than CH4
Both are equally efficient as a fuel

Question No : 13
Heat of fusion of a molecular solid is

very high

Question No : 14
Heat of Reaction between sodium hydroxide and hydrochloric acid is 57.32 KJ mole-1. So heat of dissociation of water is

-57.32 KJ mole-1
+23.7KJ mole-1
+57.32 KJ mole-1
-13.7KJ mole-1