ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Select the correct answer for the statement given below:

The neutral gas obtained on thermal decomposition of potassium nitrate.

Differentiate between the following:

An acidic oxide and a basic oxide.

State true or false. If false, correct the statement.

Smaller the size of the orbit, lower is the energy of the orbit.

What is a chemical equation ?

Why it is necessary to balance a chemical equation ?

What are the limitations of a chemical equation ?

What are the ways by which a chemical equation can be made more informative ?

Differentiate between:

Reactants and products.

Differentiate between:

A balanced and an unbalanced chemical equation.

Balance the following equation:

N₂ + H₂ → NH₃

Balance the following equation:

H₂ + O₂ → H₂O

Balance the following equation:

Na₂O + H₂O → NaOH

Balance the following equation:

CO + O₂ → CO₂

Balance the following equation:

Zn + HCI →  ZnCI₂ + H₂

Write a balanced chemical equation for the following word equation:

Iron + Chlorine → Iron (III) chloride

Write balanced chemical equations for the following word equation:

Magnesium + dil sulphuric acid → Magnesium sulphate + water

Write balanced chemical equations for the following word equation:

Magnesium + oxygen → Magnesium oxide

Write balanced chemical equations for the following word equation:

Calcium oxide + water → Calcium hydroxide

Write balanced chemical equations for the following word equation:

Sodium + chlorine → Sodium chloride

What information do you get from the following chemical equation:
Zn(s) + 2HCl (dil) → ZnCl₂ (aq) + H₂(g)