8th Class Science Chapter 6 MCQ Test With Answer for Science chapter 6

MCQ's Test For Chapter 6 "General Science 8th Class English Medium Chapter 6 Online Test"

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General Science 8th Class English Medium Chapter 6 Online Test

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Question # 1

Substancs whihc take part in a chemical reaction are called.

Question # 2

Symbol and formulae of the reactants are written on....... side fo arrow.

Question # 3

Heating of solid potassium chlorate produces a gas.

Question # 4

Law of conservation of mass put forward in.

Question # 5

Law fo conservation of mass was put forward by

Question # 6

When methane is burnt in air, CO2 and.......... are formed.

Question # 7

The equation in which the number of atoms of each element on both sides are not equal is called.

Question # 8

How many oxygen atoms are present in onw molecule of Mg(HCO3)2

Question # 9

During photosynthesis in plants, carbon dioxide CO2 and water react to produce.

Question # 10

The chemicla reaction during which a compound splits up into two or more simple substanes, is called.

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6th Chapter

8th General Science English Medium Chapter 6 Test

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8th General Science (English Medium) Chapter 6 Important MCQ's

Sr.# Question Answer
1 Law fo conservation of mass was put forward by
A. Newton
B. Plank's
C. Lavoisier
D. Einstein
2 Thermal decompositionof calcium carbonate produces a gas.
A. Oxygen
B. Carbon di oxide
C. Nitrogen
D. Carbon monoxide
3 The product fo the reaction between zinc and dilute sulphuric acid are.
A. Zinc oxide and water
B. Zinc sulphide and water
C. Zinc sulphate and hydrogen
D. Zinc sulphide and hydrogen
4 The equation in which the number of atoms of each element on both sides are not equal is called.
A. Quadratic equation
B. Unbalanced equation
C. Balanced equation
D. Standard equation
5 Carbon burns in air to release energy along with the formation of.
A. Carbon dioxide and hydrogen
B. Carbon monoxide and hydrogen
C. Carbon di oxide
D. Carbon dioixe and water
6 During a chemical reaction, total mass of the product is equal to the total mass of reactants, this is a statements of.
A. Law of conservation of momentum
B. Law of conservation of energy
C. Law of conseration of mass
D. Law of conseration of acceleration
7 Fire works is an example of ........... reactions.
A. Addition
B. Exothermic
C. Endothermic
D. Decomposition
8 Heating of solid potassium chlorate produces a gas.
A. Chlorine
B. Carbon dioxide
C. Carbon mono oxide
D. Oxygen
9 The chemicla reaction during which a compound splits up into two or more simple substanes, is called.
A. Additon reaction
B. Decomposition
C. Replacement reaction
D. Balanced reaction
10 Symbol and formulae of the reactants are written on....... side fo arrow.
A. Left
B. Right
C. Upward
D. Both side

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