ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Define chemical reaction.

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 a chemical reaction.

Balance the following equation:

`Fe +O_2    →   Fe_3 O_4`

Balance the following equation:

`Fe+ H_2O   →   Fe_3 O_4+H_2`

Balance the following equation:

`N_2+O_2    →    NO`

Balance the following equation:

`Pb_3 O_4     →    PbO+O_2`

Balance the following equation. Also name the products formed.

`NaNO_3→ NaNO_2  +  O_2 `       Name of product (s)

Balance the following equations Also name the products formed.

`K+CI_2→ KCI`

Balance the following equation. Also name the products formed.

Ag +S          →   `Ag_2 S`

Balance the following equation. Also name the products formed. 

`Mg + O_2         → MgO`

Balance the following equation. Also name the products formed.

`KCIO_3          →    KCI +O_2`

Balance the following equation. Also name the products formed.

`H_2O_2     →   H_2O +O_2`

Balance the following equation. Also name the products formed.

`H_2 + CI_2     →   HCI`

Balance the following equation. Also name the products formed.

`Na + H_2 O   → Na OH + H_2` 

Balance the following equation. Also name the products formed.

`CO + O_2      → CO_2`

Balance the following equation. Also name the products formed.

`Zn+ HCI   →  ZnCI _2 + H_2`

Balance the following equation. Also name the products formed.

`K_2 O +  H_2 O  →  KOH`

Balance the following equation. Also name the products formed.

`CO _2 + C    →   CO`

Balance the following equation. Also name the products formed.

`N_2 + H_2    →  NH_3`