Question

A non-metal 'X' when burnt in air forms its oxide 'Y'. This oxide 'Y' dissolves in water to form an acid.

(a) What is 'X' and 'Y'?
(b) What is the difference between 'Y' and 'Magnesium oxide'?​

Answer 1

Answer:

X = Carbon (C)

Y = CO2 (Carbon Dioxide)

(b) Y is a non metal oxide whereas magnesium oxide is a metallic oxide.

Explanation:

CO2 + H20 = H2CO3

H2CO3 is a carbonic acid.