Question

1)A solution of potassium chloride when mixed with silver nitrate solution, an insoluble wte
substance is formed. Write the chemical reaction involved and also mention the type of the
chemical reaction?
2). 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?
3). Give the characteristic tests for CO2,SO2,O2,H2

Answer 1

1, Balanced chemical equation is 
KCl + AgNO3 → KNO3 (aq)+ AgCl(s)
This is an example of double displacement reaction.

SORRY) OTHERS I DID'NT UNDERSTAND