Exercises

Author:Amarnath Mishra, Geeta Mehta, Rajesh Mohan & Deepti Lehri

Amarnath Mishra Science Solutions for Exercises

Simple step-by-step solutions to Exercises questions of Combustion and Fuels from Basic Science for Class 8. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Exercises with Hints & Solutions

EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q D

A log of wood attains the ignition temperature _____ than wood shavings do. (Faster/ Slower)

MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q D

In the liquid state, hydrogen is used as a fuel in _____. (train / satellite / bus / spacecraft)

EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q D

Gaseous fuels are _____ than solid and liquid fuels. (better/worse)

MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q E

Which among the following fuels has the highest calorific value?

MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q E

Which of the following is not derived from a fossil fuel?

MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q E

The main constituent of coal is

MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q E

Among other things, a good fuel should have a

HARD
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 7 - Combustion and Fuels>Exercises>Q F

Match the columns

A   B
(a) Biogas (i) A liquid fraction from the refining of petroleum
(b) Natural gas (ii) The lowest-boiling fraction in petroleum refining
(c) Petroleum gas (iii) Accumulated in petroleum wells
(d) Kerosene (iv) Anaerobic fermentation of cattle dung