NA

Author:Amit Rastogi

Amit Rastogi Science Solutions for Exercise - NA

Simple step-by-step solutions to NA questions of Combustion and Flame from ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from NA with Hints & Solutions

MEDIUM
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 9

Define spontaneous combustion.

MEDIUM
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 10

Which of the following products is not obtained during complete combustion?

HARD
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 21

Give reason: It is difficult to burn wet cloth.

EASY
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 22

What are inflammable substances? Give two examples.

MEDIUM
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 23

The ignition temperature of white phosphorous is:

EASY
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 24

The ignition temperature of red phosphorus is less than that of white phosphorus. 

EASY
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 25

Coal, wood and paper are combustable substances.

MEDIUM
8th CBSE
IMPORTANT
ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 8>Chapter 4 - Combustion and Flame>Q 30

Carbon dioxide fire extinguishers cannot control fire caused by electric current.