Combustion and Flame Test

Question 1
1 / -0

Which of the following gases is responsible for global warming?

A
Carbon monoxide

B
Carbon dioxide

C
Nitrogen

D
Ozone

Question 2

1 / -0

Use the following information to answer the next question.

The given table lists the ignition temperatures of four fuels W, X, Y, and Z respectively.
Fuel	Ignition temperature
W	38^oC
X	42^oC
Y	53^oC
Z	54^oC

At 50^oC, which of the given fuels is likely to undergo combustion?

Y and Z

X and Y

W and X

Z and W

Question 3
1 / -0

Which of the following substances is not required for combustion?

A
O₂

B
CO₂

C
Fuel

D
Heat

Question 4

1 / -0

Use the following information to answer the next question.

The given table lists some substances as per their burning tendencies.
Produce a flame	Do not produce a flame
Molten wax	Kerosene oil
Camphor	Charcoal

Which of the following substances is incorrectly categorized?

Charcoal

Camphor

Kerosene oil

Molten wax

Question 5

1 / -0

Use the following information to answer the next question.

The given table lists some fuels with their calorific values.
Fuel	Calorific value
Diesel	45000
LPG	55000
Petrol	45000
CNG	50000

Which of the given fuels is the most efficient?

Petrol

Diesel

LPG

CNG

Question 6
1 / -0

Theunit of calorific value of a fuel is

A
°C

B
L

C
m/s

D
kJ/kg

Question 7

1 / -0

Which of the following tablescorrectly matches the given zones of a candle flame with their respective characteristics?

Zone Characteristic

i Innermost Least hot and black

ii Luminous Moderately hot and yellow

Zone Characteristic

i Outermost Hottest and black

ii Luminous Least hot and blue

Zone Characteristic

i Non-luminous Least hot and blue

ii Innermost Hottest and black

Zone Characteristic

i Non-luminous Moderately hot and yellow

ii Outermost Least hot and black

Question 8
1 / -0

What is a major cause of global warming?

A
Gaseous nitrogen oxides released by petrol engines

B
Oxides of sulphur and nitrogen dissolved in rain water

C
Emission of sulphur dioxide on combustion of coal

D
Release of carbon dioxide on combustion of fuels

Question 9
1 / -0

Which of the following substances is non-combustible?

A
Wood

B
Biogas

C
Kerosene oil

D
A piece of stone

Question 10
1 / -0

Which of the following statements is correct?

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 equipments.

Question 11

1 / -0

Use the following information to answer the next question.

The head of a matchstick contains a mixture of antimony trisulphide, potassium chlorate, starch, and some glue. For combustion, it is struck against a rough surface made of powdered glass and red phosphorus.

Which of the following substances will be the first to get ignited when the match is struck against a rough surface?

Antimony trisulphide

Potassium chlorate

Red phosphorus

Powdered glass

Question 12
1 / -0

Use the following information to answer the next question.

A piece of paper wrapped around an aluminium pipe does not catch fire easily.

Which of the following reasons supports the above information?

A
Paper is non-combustible in nature

B
Aluminium is non-combustible in nature

C
Aluminium pipe does not attain its ignition temperature

D
Paper wrapped around the pipe does not attain its ignition temperature

Question 13
1 / -0

Which of the following fuels is the most efficient?

A
Coal

B
Wood

C
Biogas

D
Charcoal

Question 14
1 / -0

Which of the following is not a characteristic of a good fuel?

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 burn at a slow rate in air

Question 15
1 / -0

Use the following information to answer the next question.

The calorific value of a fuel is 330000 kJ/kg. 0.9634 kg of the fuel is taken for combustion.

The total amount of heat energy (in kJ) produced during combustion is

A
317922

B
215677

C
3179.22

D
317.922

Submit Test

	Zone	Characteristic
i	Innermost	Least hot and black
ii	Luminous	Moderately hot and yellow

	Zone	Characteristic
i	Outermost	Hottest and black
ii	Luminous	Least hot and blue

	Zone	Characteristic
i	Non-luminous	Least hot and blue
ii	Innermost	Hottest and black

Combustion and ...

Question 1

Carbon monoxide

Carbon dioxide

Nitrogen

Ozone

Question 2

Y and Z

X and Y

W and X

Z and W

Question 3

O2

CO2

Fuel

Heat

Question 4

Charcoal

Camphor

Kerosene oil

Molten wax

Question 5

Petrol

Diesel

LPG

CNG

Question 6

°C

L

m/s

kJ/kg

Question 7

Zone Characteristic i Innermost Least hot and black ii Luminous Moderately hot and yellow

Zone Characteristic i Outermost Hottest and black ii Luminous Least hot and blue

Zone Characteristic i Non-luminous Least hot and blue ii Innermost Hottest and black

Zone Characteristic i Non-luminous Moderately hot and yellow ii Outermost Least hot and black

Question 8

Gaseous nitrogen oxides released by petrol engines

Oxides of sulphur and nitrogen dissolved in rain water

Emission of sulphur dioxide on combustion of coal

Release of carbon dioxide on combustion of fuels

Question 9

Wood

Biogas

Kerosene oil

A piece of stone

Question 10

Liquefied Petroleum gas is a better domestic fuel than wood.

Fire produced by kerosene oil can be controlled using water.

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

Water is used to control fires involving electrical equipments.

Question 11

Antimony trisulphide

Potassium chlorate

Red phosphorus

Powdered glass

Question 12

Paper is non-combustible in nature

Aluminium is non-combustible in nature

Aluminium pipe does not attain its ignition temperature

Paper wrapped around the pipe does not attain its ignition temperature

Question 13

Coal

Wood

Biogas

Charcoal

Question 14

It should be cheap and readily available

It should have a high calorific value

It should be environment friendly

It should burn at a slow rate in air

Question 15

317922

215677

3179.22

317.922

User

Question Analysis

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O₂

CO₂

Zone Characteristic

i Innermost Least hot and black

ii Luminous Moderately hot and yellow

Zone Characteristic

i Outermost Hottest and black

ii Luminous Least hot and blue

Zone Characteristic

i Non-luminous Least hot and blue

ii Innermost Hottest and black

Zone Characteristic

i Non-luminous Moderately hot and yellow

ii Outermost Least hot and black