(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Chemistry

Select the correct answer from the choice given in the options.

A drying agent, deliquescent in nature used in a dessicator ______.

An element ‘A’ has mass number 23 and atomic number 11. State the –

1. no. of neutrons in its shell,
2. electronic configuration of the element ‘A’.

Name or state the following:

An efflorescent decahydrate salt.

Differentiate between the following term:

Atomic number and mass number

Balance the following important equation:

NaHCO₃ + H₂SO₄ → Na₂SO₄ + H₂O + CO₂ 

Balance the following important equation:

NaOH + H₂SO₄ → Na₂SO₄ + H₂O 

Balance the following important equation:

Pb(NO₃)₂ + NaCl → NaNO₃ + PbCl₂ 

Balance the following important equation:

FeSO₄ + NaOH → Na₂SO₄ + Fe(OH)₂ 

Balance the following important equation:

FeCl₃ + NaOH → NaCl + Fe(OH)₃

Balance the following important equation:

CuSO₄ + NaOH → Na₂SO₄ + Cu(OH)₂  

Balance the following important equation:

FeCl₃ + NH₄OH → NH₄Cl + Fe(OH)₃  

Balance the following important equation:

ZnO + NaOH → Na₂ZnO₂ + H₂O  

Balance the following important equation:

Pb(OH)₂ + NaOH → Na₂PbO₂ + H₂O  

Balance the following important equation:

Al₂O₃.2H₂O + NaOH → NaAlO₂ + H₂O  

Balance the following important equation:

NaAlO₂ + H₂O  → NaOH  + Al(OH)₃ 

Balance the following important equation:

\[\ce{Al(OH)3 -> Al2O3 + H2O}\]

Balance the following important equation:

ZnS  + O₂  → ZnO + SO₂ 

Balance the following important equation:

Fe₂O₃  + Al  → Al₂O₃ + Fe

Balance the following important equation:

Al + Cl₂  → AlCl₃ 

Balance the following important equation:

Fe + HCl  → FeCl₂ + H₂