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 .

Observe the diagram given alongside carefully and answer the questions below. After ten minutes of keeping the set-up as shown in the figure, the colour of the iron nail changes, what does this indicate?

When a piece of iron metal is placed in copper sulphate solution, then iron sulphate solution and copper metal are formed. CuSO 4 ( aq ) + Fe ( s ) → FeSO 4 ( aq ) + Cu ( s ) . In this reaction, iron displaces copper from copper sulphate solution. The deep blue colour of copper sulphate solution fades due to the formation of a light green solution of iron sulphate. A red-brown coating of copper metal is formed on the surface of the iron metal. This reaction occurs because iron is more reactive than copper. It is a type of displacement reaction.

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 observations were recorded.
Name the products obtained on heating ferrous sulphate crystals.

Important Questions on Chemical Reactions and Equations

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.