Question

4 A white solid X on heating produces yellow solid L, reddish brown gas Y and a colourless gas ZZ is used
for roasting and Y is an acidic gas identify X, Y, Z and L with suitable reasons. Identify the type of reaction
and also write the equations.​

Answer 1

ANSWER

carbon dioxide(Z) is an acidic oxide is produced on heating sodium bicarbonate (X) while the formation of sodium carbonate (Y).

2NaHCO

3

(X)→Na

2

CO

3

(Y)+CO

2

(Z)+H

2

O

The carbon dioxide gas is also given out when sodium bicarbonate reacts with an acid.

NaHCO

3

(X)+HCl→NaCl+CO

2

(Z)+H

2

O

The sodium carbonate is formed if caustic soda is left open in the atmosphere.

2NaOH+CO

2

(Atmosphere)→Na

2

CO

3

(Y)+H

2

O