The diagram alongside displays a chemical reaction. Observe carefully and answer the following questions. Identify the type of chemical reaction that will take place and define it. How will the colour of the salt change?

In the above diagram, The photochemical reaction is taking place. It is defined as a chemical reaction initiated by the absorption of energy in the form of light. The consequence of molecules' absorbing light is the creation of transient excited states whose chemical and physical properties differ greatly from the original molecules. In presence of light, the white colour of silver chloride changes to grey due to the formation of silver metal. 2 AgCl s → light 2 Ag s + Cl 2 g .

E M B I B E

Science Chemistry>Chapter 1 - Chemical Reactions and Equations>Practice Questions>Q 7

HARD

10th ICSE

IMPORTANT

Earn 100

$2$ g of ferrous sulphate crystals were heated in a hard glass test -tube and observation were recorded.
What was the successive colour change?

Important Questions on Chemical Reactions and Equations

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 1 - Chemical Reactions and Equations>Practice Questions>Q 7

2

g of ferrous sulphate crystals were heated in a hard glass test -tube and observation were recorded.
Identify the liquid droplets collected on the cooler parts of the test tube.

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 1 - Chemical Reactions and Equations>Practice Questions>Q 7

2

g of ferrous sulphate crystals were heated in a hard glass test -tube and observation were recorded.
What type of odour is observed on heating ferrous sulphate crystals?

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 1 - Chemical Reactions and Equations>Practice Questions>Q 7

2

g of ferrous sulphate crystals were heated in a hard glass test -tube and observations were recorded.
Name the products obtained on heating ferrous sulphate crystals.

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 1 - Chemical Reactions and Equations>Practice Questions>Q 8

Name the products obtained by the electrolysis of water mentioning the electrode at which each of these are collected. Why is the volume of the product collected at one electrode two times of that collected at the other electrode? Explain.

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 1 - Chemical Reactions and Equations>Practice Questions>Q 9

Give one equation for the decomposition reactions where energy is supplied in form of heat.

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 1 - Chemical Reactions and Equations>Practice Questions>Q 9

Give one equation each for the decomposition reactions where energy is supplied in the form of light.

MEDIUM

10th ICSE