Combustion and Flame Test

Result

Combustion and Flame Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance?

A
Iron nail

B
Glass

C
Stone piece

D
Wood
Question 2
1 / -0

Which one of the following has the highest calorific value?

A
Kerosene

B
Biogas

C
LPG

D
Petrol
Question 3
1 / -0

Magnesium ribbon on burning in air produces

A
magnesium oxide, water and light.

B
magnesium oxide and heat.

C
magnesium oxide, heat and light.

D
magnesium oxide, heat and light.
Question 4
1 / -0

Which of the following is not a combustible substance?

A
Camphor

B
Glass

C
Straw

D
Alcohol
Question 5
1 / -0

The substance that does not burn with flame is

A
LPG

B
camphor

C
dry grass

D
charcoal
Question 6
1 / -0

On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non-availability of

A
oxygen

B
water vapours

C
carbon dioxide

D
wax
Question 7
1 / -0

If a person’s clothes catches fire, the best way to extinguish the fire is to

A
throw water on the clothes.

B
use fire extinguisher.

C
cover the person with a woollen blanket.

D
cover the person with a polythene sheet.
Question 8
1 / -0

The substance expected to have the highest ignition temperature out of the following is

A
kerosene

B
petrol

C
coal

D
alcohol
Question 9
1 / -0

Choose the correct statement about inflammable substances from the following. They have

A
low ignition temperature and cannot catch fire easily

B
high ignition temperature and can catch fire easily

C
low ignition temperature and can catch fire easily.

D
high ignition temperature and cannot catch fire easily.
Question 10
1 / -0

Choose the incorrect statement from the following. Forest fires are usually due to

A
carelessness of humans.

B
heat of Sun.

C
cutting of trees.

D
lightning strike.
Question 11
1 / -0

The calorific value of a fuel is expressed in a unit called

A
kilojoule per litre.

B
kilogram per millilitre.

C
kilojoule per gram.

D
kilojoule per kilogram.
Question 12
1 / -0

In villages, people use wood as fuel because

A
it is considered to be an ideal fuel.

B
of its easy availability and low cost.

C
it is environment friendly.

D
it catches fire easily.
Question 13
1 / -0

Which among the following is considered as the cleanest fuel?

A
Cow dung cake

B
Petrol

C
Kerosene

D
Hydrogen gas
Question 14
1 / -0

Choose the incorrect statement from the following.

A good fuel is one which

A
is readily available.

B
produces a large amount of heat.

C
leaves behind many undesirable substances.

D
burns easily in air at a moderate rate.
Question 15
1 / -0

Shyam was cooking potato curry on a chulha. To his surprise he observed that the copper vessel was getting blackened from outside. It may be due to

A
proper combustion of fuel.

B
improper cooking of potato curry.

C
improper combustion of the fuel.

D
burning of copper vessel.

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Re-Attempt Weekly Quiz Competition

Combustion and Flame Test - 2

Result

Combustion and Flame Test - 2

Score

-

Rank

-

SHARING IS CARING

Question 1

Iron nail

Glass

Stone piece

Wood

Question 2

Kerosene

Biogas

LPG

Petrol

Question 3

magnesium oxide, water and light.

magnesium oxide and heat.

magnesium oxide, heat and light.

magnesium oxide, heat and light.

Question 4

Camphor

Glass

Straw

Alcohol

Question 5

LPG

camphor

dry grass

charcoal

Question 6

oxygen

water vapours

carbon dioxide

wax

Question 7

throw water on the clothes.

use fire extinguisher.

cover the person with a woollen blanket.

cover the person with a polythene sheet.

Question 8

kerosene

petrol

coal

alcohol

Question 9

low ignition temperature and cannot catch fire easily

high ignition temperature and can catch fire easily

low ignition temperature and can catch fire easily.

high ignition temperature and cannot catch fire easily.

Question 10

carelessness of humans.

heat of Sun.

cutting of trees.

lightning strike.

Question 11

kilojoule per litre.

kilogram per millilitre.

kilojoule per gram.

kilojoule per kilogram.

Question 12

it is considered to be an ideal fuel.

of its easy availability and low cost.

it is environment friendly.

it catches fire easily.

Question 13

Cow dung cake

Petrol

Kerosene

Hydrogen gas

Question 14

is readily available.

produces a large amount of heat.

leaves behind many undesirable substances.

burns easily in air at a moderate rate.

Question 15

proper combustion of fuel.