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Chemistry - 9 Chapter - 10
Chemical Energetics
Test - 3
1.
Define Heat content?
a) Heat content is the enthalpy of heat.
b) Heat content is the enthalpy of any substance.
2.
Heat content is the enthalpy of any substance.
a) True
b) False
3.
Heat of reaction is the heat evolved or absorbed during a chemical reaction which takes place at____ pressure.
a) Any
b) Container
c) Constant
d) Atmospheric
4.
Enthalpy of reaction is that heat of reaction which takes place at _______ pressure.
a) Atmospheric
b) Constant
c) Any
d) Container
5.
When a reaction is carried out in a closed vessel, the pressure on the reactants __________constant.
a) Remains
b) Does not remain
6.
When a reaction is carried out in a closed vessel, why the pressure on the reactants does not remain constant?
a) Due to evolution or absorption of heat because of the reaction which is taking place, the pressure keeps on changing.
b) Due to evolution or absorption of heat because of the reaction which is taking place, the pressure remains constant.
7.
Mostly the chemical reactions are carried out?
a) 3. In a closed vessel
b) 1. Answers 2 and 4 are correct
c) 4. It constant atmospheric pressure.
d) 2. In an open vessel
8.
Enthalpy of substance is not called its heat content.
a) True
b) False
9.
Heat evolved or absorbed during a chemical reaction carried out at a constant pressure, is the enthalpy of reaction.
a) True
b) False
10.
Heat evolved or absorbed during a chemical reaction carried out at a constant pressure is represented as
a) H
b) E
c) T
d) P
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