Choose the best: Types of chemical reactions — task. Science CBSE, Class 10.

PDF chapter test TRY NOW

Choose the best answer:

1. When \Ca(NO_3)_2\) is heated, it gives \(CaO\), \(NO_2\)(g) and \(O_2\)(g). The correct number of moles of \(Ca(NO_3)_2\), \(CaO\), \(NO_2\)(g) and \(O_2\)(g) are present in the reaction are respectively

\(1\), \(3\), \(4\), \(1\)
\(2\), \(1\), \(3\), \(2\)
\(2\), \(2\), \(4\), \(1\)
\(2\), \(1\), \(1\), \(2\)

2. Which one of the following involve a chemical reaction?

Evaporation of water
Keeping petrol in a china dish in open
Storing on nitrogen gas under pressure
Heating magnesium wire in the presence of air at high temperature

Previous exercise

Exit to the topic

Next exercise

Send feedback

Did you find an error?

Send it to us!

33. Choose the best: Types of chemical reactions

Exercise condition: