ICSE/ISC Std 8 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
Brass objects are protected against corrosion by chromium

(A) Electrolysis	(B) Photolysis
(C) Electroplating	(D) Hydrolysis

Question-2
Reaction between barium chloride(Bacl₂)and sulphuric acid (H₂SO₄)is a

(A) Double displacement reaction	(B) Combination reaction
(C) Decomposition reaction	(D) Addition reaction

Question-3 Decomposition of a compound caused by the passage of electricity is called_____________.

(A) Thermal decomposition	(B)Photo decomposition
(C)Electrolytic decomposition	(D)Combination reaction

Question-4
Compounds which have the same molecular formula but different chemical and physical properties are called

(A) Isotopes	(B) Isobars
(C) Isotones	(D) Isomers

Question-5 When electrical potential is applied across the solution the anions move towards___________________.

(A) Anode	(B)Electroyte
(C)Cathode	(D)Solution

Question-6
Conversion of water to steam is a

(A) Exothermic reaction	(B) Endothermic reaction
(C) Photochemical reaction	(D) Electrochemical reaction

Question-7
The substance which give highly conducting solutions in water are called

(A) Solvent	(B) Strong electrolyte
(C) Weak electrolyte	(D) Solution

Question-8
The reactions in which only a part of the reactants get converted into products are called

(A) Reversible reaction	(B) Irreversible reaction
(C) Homogeneous reaction	(D) Heterogeneous reaction

Question-9
Based on________________the reactions can be classified as exothermic reaction and endothermic reaction.

(A) Absorption or evolution of heat	(B) Physical state
(C) Favoured direction	(D) Chemical properties

Question-10 The boiling point of an impure liquid is ________________that of the pure liquid.

(A) Higher than	(B)Lower than
(C)Same as	(D)Very low

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Std 8

ICSE/ISC

Practice in Related Chapters
Hydrogen
Structure of Atom
Transformation of Substances
Metals and nonmetals
Carbon and its Compounds