Metallurgy — Chemistry STD 10 — Question

Differentiate between:
Action on indicators or dry ammonia gas and aqueous ammonia

What do you observe when Ammonia in excess is mixed with chlorine.

Dilute nitric acid is generally considered to be a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?

Give appropriate scientific reasons for the following statement :
Zinc oxide can be reduced to zinc by using carbon monoxide, but aluminium oxide cannot be reduced by a reducing agent.

Name the gas produced in each of the following reactions :
(i) Action of conc. nitric acid on copper. (ii) Heating of ammonium nitrate.

Define the term : Avogadro's number

Write the ionization of sulphuric acid showing the formation of hydronium ion.

Using Sodium hydroxide solution, how would you distinguish: Zinc nitrate solution from calcium nitrate solution.