Physical and Chemical Changes

Front

Is burning a chemical change?

Back

Yes

Front

What does this figure show? Options: rusting of iron, rusting, rust

Back

rusting of iron, rusting, rust

Front

What is the process of depositing zinc on the surface of iron to prevent rusting called?

Back

galvanisation

Front

What happens after burning magnesium ribbon?

Back

White coloured light of fire will come

Front

The change of burning magnesium tape can be represented by the following equation:
Options:

Mg + CO2 = MgO2

,

Mg + O2 = MgO

,

Mg + O2 = MgO2

,

Mg + CO2 = MgO

Back

Mg + O2 = MgO

Front

Equation after adding water to magnesium tape's ashes?

Back

Mg + H2O = Mg(OH2)

Front

Name the process:-

large crystals of pure substances can be formed from the solution by this process.

Back

Crystallisation

Front

What does Ozone convert in oxygen? Options: Ultraviolet rays of Sun, Harmful Ultraviolet rays, Ultraviolet radiations

Back

Ultraviolet rays of Sun, Harmful Ultraviolet rays, Ultraviolet radiations