EASY
9th ICSE
IMPORTANT
Earn 100

State whether Souring of milk is chemical change or physical change. 

Important Questions on Chemical Changes and Reactions

EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 13
State whether tearing of paper is chemical or physical change.
EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 13
State whether stitching of shirt is physical or chemical change.
EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 14
A substance which increases the efficiency of a catalyst is known as _____ .
EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 14
Petrol, LPG and kerosene are _____ substances.
EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 15
Give one word for the chemical reaction in which heat is evolved.
EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 15

Give one word for the reaction which take place in presence of electricity.

EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 15
Give one word for the substances which do not burn in air or oxygen.
EASY
9th ICSE
IMPORTANT
TOGETHER WITH CHEMISTRY>Chapter 2 - Chemical Changes and Reactions>Self Evaluation Test>Q 15
Give one word for the substance which increases the rate of reaction without itself undergoing any change.