Class 10 – sci- Chemical reaction s

Here is a Quick test with Five questions for Assessments:

1.

Which one of the following will be required to identify the gas evolved when diluted HCl reacts with zinc metal?

Red litmus solution

Lime water

Blue litmus solution

A burning splinter

2.

Corrosion in case of iron is known as

Rancidity

Rusting

Reduction

Combination

3.

is the process in which metals are eaten up gradually by the action of air, moisture or a chemical on their surface.

4.

Magnesium ribbon is rubbed before burning because it has a coating of

basic magnesium chloride

basic magnesium oxide

basic magnesium carbonate

basic magnesium sulphide

5.

The balanced chemical reaction for the following reaction is given as

CO2(aq) + H2O(l) → C6H12O6(aq) + O2 (aq)

6 CO2(aq) +12 H2O(l) → C6H12O6(aq) + O2(aq)

6 CO2(aq) + 6 H2O(l) → C6H12O6(aq) + 6 O2(aq)

6 CO2(aq) + 3 H2O(l) → C6H12O6(aq) + 6 O2(aq)

6 CO2(aq) + 6 H2O(l) → C6H12O6(aq) + 5 O2(aq)

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