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Question-1
Limestone on heating gives:
(A)
Calcium oxide
(B)
Calcium hydroxide
(C)
Calcium carbonate
(D)
Calcium sulphate
Question-2
The temperature at which CO
2
is a gas, but water is a liquid.
(A)
300k
(B)
33k
(C)
810 K
(D)
298 K
Question-3
The total enthalpy change for a chemical reaction takes place, provided the initial and final conditions are the same. The law is:
(A)
I
st
law of thermodynamics
(B)
Gay Lussac's Law
(C)
Law of multiple proportion
(D)
Hess's law
Question-4
The total energy content of the reacting materials is:
(A)
Entropy
(B)
Enthalpy
(C)
Surface energy
(D)
Heat of formation
Question-5
Bond breaking is a:
(A)
Exothermic reaction
(B)
Endothermic reaction
(C)
Neutralisation reaction
(D)
Displacement reaction
Question-6
An exothermic enthalpy always have a value:
(A)
Negative
(B)
Positive
(C)
Zero
(D)
Either negative or positive
Question-7
Reactions in which heat energy is absorbed is called:
(A)
Exothermic
(B)
Thermometric
(C)
Photometric
(D)
Endothermic
Question-8
The energy required to decompose limestone.
(A)
+ 572 KJ mol
-1
(B)
- 890.3 KJ mol
-1
(C)
- 588 KJ mol
-1
(D)
-833 KJ mol
-1
Question-9
The compound plants produce by photosynthesis.
(A)
Proteins
(B)
Carbohydrates
(C)
Amines
(D)
Oxygen
Question-10
An exothermic enthalpy always have a value:
(A)
Negative
(B)
Positive
(C)
Zero
(D)
Either negative or positive
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Cambridge Advanced Grade 12
IGCSE
Practice in Related Chapters
Planet Earth
Atomic Structure
Group VII Elements and their Compounds
Halogenoalkanes
Basic Concepts in Organic Chemistry
Alcohols
Hydrocarbons: Alkenes
Hydrocarbons: Fuels
Reaction Rates
Enthalpy Changes
Equilibria
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