EASY
10th CBSE
IMPORTANT
Earn 100

Electrolysis of water is a decomposition. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is;

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Important Questions on Chemical Reactions and Equations

HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Paper-Pen Test>Q 7
Which of the following metals can not displace copper from copper sulphate solution?
EASY
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Paper-Pen Test>Q 8
Which of the following will be required to identify the gas evolved when dilute hydrochloric acid reacts with zinc metal
EASY
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Paper-Pen Test>Q 9
A piece of granulated zinc was dropped into copper sulphate solution. After some time, the colour of the solution changed from
EASY
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Paper-Pen Test>Q 10

A student take some zinc granules in a test tube and adds dilute hydrochloric acid to it.

He would observe that the colour of zinc granules change to:

EASY
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Summative Assessment>Q 1
When iron is heated with sulphur, iron sulphide is formed. Name the reaction.
EASY
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Summative Assessment>Q 2
Aluminium metal displaces iron from ferric oxide Fe2O3 giving aluminium oxide and iron.
Which is more reactive, aluminium or iron?
EASY
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Summative Assessment>Q 3
The taste and smell of the food changes when kept for long time in the open. What is it called?
EASY
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 1 - Chemical Reactions and Equations>Summative Assessment>Q 4
What is general name of the chemicals which are added to fat and oil containing foods to prevent the development of rancidity?