NCERT Solutions for Chapter: Combustion and Flame, Exercise 1: Exercise

Author:NCERT

NCERT Science Solutions for Exercise - NCERT Solutions for Chapter: Combustion and Flame, Exercise 1: Exercise

Attempt the practice questions on Chapter 6: Combustion and Flame, Exercise 1: Exercise with hints and solutions to strengthen your understanding. Science Textbook of Competency Based Questions for Class VIII solutions are prepared by Experienced Embibe Experts.

Questions from NCERT Solutions for Chapter: Combustion and Flame, Exercise 1: Exercise with Hints & Solutions

MEDIUM
8th CBSE
IMPORTANT

Which of these is correct about spontaneous combustion?

MEDIUM
8th CBSE
IMPORTANT

How does dumping sand on fire extinguish the flame?

MEDIUM
8th CBSE
IMPORTANT

Which of these materials is combustible?

HARD
8th CBSE
IMPORTANT

Water is used to extinguish fire because it

HARD
8th CBSE
IMPORTANT

An eleven-year old naughty boy Krish took the keys of his father's car without his father's permission. He went inside the garage, closed it and started the ignition. After a few minutes, he started coughing. His father, fortunately, went into the garage, opened it, immediately brought him out and rescued him. Krish's mother asked her husband the reason for Krish's condition. What explanation did the father give? 

HARD
8th CBSE
IMPORTANT

Give reason: Dry wood is an essential fuel for camp fire.

HARD
8th CBSE
IMPORTANT

Give reason: It is difficult to burn wet cloth.

MEDIUM
8th CBSE
IMPORTANT

8 Kg of a fuel produces 4,24,000 kJ of heat energy on complete combustion. Calculate the calorific value of the fuel.