Multiple Choice Question Answer XXXXVIII — task. Science CBSE, Class 10.

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1. Both

$CO_2$ and

$H_2$ gases are:

Heavier than air
Soluble in water
Acidic in nature
Colourless

2. Which of the following reactions is/are also called partner exchange reactions?

Neutralisation reactions
Neutralisation and Precipitation
Precipitation reactions
Chemical decomposition

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