EASY
9th ICSE
IMPORTANT
Earn 100

What is meant by the term catalyst?

Important Questions on Chemical Changes and Reactions

EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 13

Name the catalyst used in the manufacture of Dalda vanaspati.

EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 13

Give an example of a reaction in which water acts as a catalyst.

MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 14

Define exothermic and endothermic changes. Give two examples of each.

EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 15
State the effect of an endothermic reaction and an exothermic reaction on the surroundings.
EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 16

Define:

Photochemical reaction

EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 16

Define:

Electrochemical reaction. Give one example of each.

EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 17
The process of a liquid changing into a solid is called _____.
EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 2 - Chemical Changes and Reactions>Questions>Q 17

Complete the following statements by using proper words:

The temperature at which a solid changes into a liquid is called _____.