ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Give the symbol and valency of the following element and radical.

Hydroxide

Give the symbol and valency of the following element and radical.

Carbonate

Give the symbol and valency of the following element and radical.

Sulphate

Give the symbol and valency of the following element and radical.

Sulphite

State what is meant by the term chemical formula.

Give the chemical formula of sodium hydroxide

Give the chemical formula of sodium nitrate

Give the chemical formula of sodium bicarbonate

Give the chemical formula of sodium sulphite

Give the chemical formula of magnesium nitrate

Give the chemical formula of ammonium sulphate

Give the chemical formula of carbonic acid

Give the chemical formula of calcium phosphate

State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.

Fill in the blank:

The element lithium in the Modern Periodic Table with valency 1⁺ belongs to the group ______.

Name the following:

The group of the Modern Periodic Table to which calcium [Ca²⁺] belongs.

The composition and properties of a _________ mixture is uniform throughout.

On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used

Solvent extraction method

Give one word answer

The solid particles which remain on the filter paper after the filtration 

Select the correct alternative from the choices given for the following statement:

A pure liquid is obtained from a solution by :