Question

a)A metal P, which is used in thermit process, when heated with oxygen gives
an oxide Q, which is amphoteric in nature. Identify P and Q. Write down
the reaction of oxide Q with HCl and NaOH.
b) When a metal X is treated with cold water, it gives a base Y with molecular
formula XOH (molar mass of X = 40) and liberates a gas z, which easily
catches fire.
Identify X, Y and Z and also write the reaction involved.

Answer 1

Answer:

A.P is aluminium and Qis aluminium oxide

B.X is calcium,Y isCa(OH)2 calcium hydroxide,Z is hydrogen gas

2Ca(s)+2H2O=2Ca(OH)2+H2