21.

Find the odd one out and explain your choice (note:valency is not a criterion)

Formic acid, Nitric acid, acetic, propanoic acid.

Solution A is a strong

Solution B is a Weak acid

Solution C is a strong alkali

Which solution could be a solution of glacial acetic acid?

Give an example of a solution which is a weak alkali.

The diagram gives below is prepare Iron (III) chloride in the laboratory

i )What is substance ?

ii) what is the purpose of B ?

iii)why is iron (III) chloride to be stored in a closed container?

iv)write the equation for the reaction between iron and chlorine.

Write the equation for the reaction to prepare lead sulphate from lead carbonate.

Define Neutralization.

Match substance A to E listed below with the appropriate description:

(A )   sulphur

(B)    silver chloride

( C)   Hydrogen Chloride

( D )  Copper (II) sulphate

(E)    Graphite.

A compound which is insoluble in cold water but soluble in excess of ammonia solution.

 Find the odd one out and explain your choice (Note: valency is not a criterion)

 Al(OH)₃, Pb(OH)₂, Mg(OH)₂, Zn(OH)₂

Identify the substance P, and R, based on the information given below:

The deliquescent salt P, turns yellow on dissolving in water, and gives a reddish brown precipitate with sodium hydroxide solution.]

Identify the substance P, and R, based on the information given below:

The pale green solid R turns reddish brown on heating. Its aqueous solution gives a white precipitate with barium chloride solution. The precipitate is insoluble in mineral acids.