ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Write true or false :

When potassium iodide solution is added to lead acetate solution a red precipitate is formed.

Write true or false .
A black residue is formed when sugar is heated .

Write true or false :

When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .

Write true or false.

A chemical equation gives only qualitative information of a chemical reaction.

A chemical equation is a statement that describes a chemical change in terms of

Balancing a chemical equation is based on

Which one is a kind of matter:

Which one is a kind of matter:

Copper carbonate when heated, it turns :

All kinds of matter

All kinds of matter

A kind of matter which can sublime is

A kind of matter which can sublime is

State four conditions necessary for a chemical reaction to take place.

Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.

 Fill in the blank:

Atoms are _____

Fill in the blank

An ion with positive charge is called ______

Fill in the blank

An ion with negative charge is called _______

Balance the following equation :

Fe + H₂O → Fe₃O₄ + H₂

Define: Ions