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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 Haber process is used for the manufacture of:
(A)
Amines
(B)
Sulphur
(C)
Ammonia
(D)
Phosphates
Question-3
The apparatus used for measuring energy during combustion.
(A)
Flame calorimeter
(B)
Photometric apparatus
(C)
Spectrometer
(D)
Galvanometer
Question-4
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-5
The compound plants produce by photosynthesis.
(A)
Proteins
(B)
Carbohydrates
(C)
Amines
(D)
Oxygen
Question-6
The spectator ions among the following.
(A)
H+
(B)
OH-
(C)
Na+
(D)
COOH
-
Question-7
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-8
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-9
An exothermic enthalpy always have a value:
(A)
Negative
(B)
Positive
(C)
Zero
(D)
Either negative or positive
Question-10
Reactions in which heat energy is released is called:
(A)
Exothermic
(B)
Endothermic
(C)
Thermometric reaction
(D)
Emission
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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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