# 8th Class Chemistry Combustion and Flame Question Bank

### done Combustion and Flame Conceptive Objective Problems

• A) P

B) Q

C) R

D) S

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• A) ${{O}_{2}}$

B) $He$

C) $C{{O}_{2}}$

D) $CO$

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• A) Water

B) Sand

C) Carbon dioxide

D) Sodium bicarbonate solution

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• A) It should be cheap and readily available

B) It should have a high calorific value

C) It should be environment friendly

D) It should bum at a slow rate in air

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• A) 317922

B) 215677

C) 3179.22

D) 317.922

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• A) $4.3203\times {{10}^{4}}$

B) $4.3203\times {{10}^{3}}$

C) $4.3203\times {{10}^{2}}$

D) $4.3203\times {{10}^{1}}$

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• A) Liquefied Petroleum gas is a better domestic fuel than wood.

B) Fire produced by kerosene oil can be controlled using water.

C) A fuel can be heated to any temperature before it starts burning.

D) Water is used to control fires involving electrical equipment?s.

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• A) Kerosene

B) Camphor

C) Wood

D) Wax

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• A) It is the zone of incomplete combustion and is least hot.

B) It is the zone of complete combustion and is the hottest zone.

C) It is the least hot zone and complete combustion takes place in this zone.

D) It is the hottest zone though incomplete combustion takes place in this zone.

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