Chemical Reactions and Equations. | Exemplar Q 39, 40, 41. | Science class10th. CBSE.

Описание: Chemical reactions and equations. Chapter 1, Class 10th Science Exemplar Questions 39, 40, 41. #dineshnayalclasses #cbseclass10 #exemplar

39) On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed.
a) Write a balanced chemical equation of the reaction.
b) Identify the brown gas X evolved.
c) Identify the type of reaction
d) What could be the pH range of aqueous solution of the gas X?

40) Give the characteristic tests for the following gasses.
a) CO2 b) SO2
c) O2 d)H2

41) What happen when a piece of
a) Zinc metal is added to copper sulphate solution?
b) Aluminium metal is added to dilute hydrochloric acid?
c) Silver metal is added to copper sulphate solution?
Also , write the balanced chemical equation, if reaction occurs.

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