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

Question-1
Electroplating is done to prevent metals from

(A) Looking bright	(B) Corrosion
(C) Sublimating	(D) Further reaction

Question-2 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

Question-3 Conversion of ferrous chloride into ferric chloride is a _______________.

(A) oxidation	(B)Reduction
(C)Rearrangement reaction	(D)Combination reaction

Question-4 When electrical potential is applied across the solution the anions move towards___________________.

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

Question-5
A reaction in which arrangement of atoms in the reactant molecule changes is called the

(A) Photochemical reaction	(B) Electrochemical reaction
(C) Rearrangement reaction	(D) Decomposition reaction

Question-6
The melting point of an impure substance is__________________that of the pure substance.

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

Question-7
The reactions in which complete conversion of reactants into products takes place are called

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

Question-8 The refined metal is obtained at the_____________________.

(A) Anode	(B)Cathode
(C)Electrolyte	(D)Electrode

Question-9
The reactions in which the reactants and products are in the same state are called

(A) Homogeneous reaction	(B) Heterogeneous reaction
(C) Exothermic reaction	(D) Endothermic reaction

Question-10
The substances which take part in a chemical reaction are said to be

(A) Reactants	(B) Products
(C) Chemical reaction	(D) Electrolytes

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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