Question

When quick lime reacts with water it forms a compound 'X'. When a greenhouse gas is passed through 'X', it turns milky due to the formation of a substance 'Y'. 'X' and 'Y' respectively are

Answer 1

When quick lime reacts with water it forms a compound 'X'.

Calcium Oxide or Quick lime (CaO) used for white wash.

So, substance X is Calcium Hydroxide.

Reaction of Calcium Oxide with water is:

$\sf{CaO+H_2O\:\rightarrow\:Ca(OH)_2}$

The above reaction is a Combination Reaction. As two or more reactants combine to form a single product.

When water reacts with Calcium Oxide formation of Calcium Hydroxide or Slaked lime takes place.

Now, a greenhouse gas is passed through 'X', it turns milky due to the formation of a substance 'Y'.

Greenhouse gas is Carbon dioxide.

(When Carbon dioxide passed through Slaked lime then milky solution is formed due to insoluble suspension of calcium carbonate.)

$</p><p>\sf{Ca(OH)_2+CO_2\:\rightarrow\:CaCO_3+H_2O}$

When Calcium Hydroxide reacts with the carbon-dioxide formation of Calcium Carbonate and water takes place.

The above reaction is Double Displacement Reaction because exchange of ions takes place.

Substance Y is Calcium carbonate.

Answer 2

Answer:

When quick lime reacts with water it forms a compound 'X'.

Calcium Oxide or Quick lime (CaO) used for white wash.

So, substance X is Calcium Hydroxide.

Reaction of Calcium Oxide with water is:

CaO + H2O = Ca(OH)2

The above reaction is a Combination Reaction. As two or more reactants combine to form a single product.

When water reacts with Calcium Oxide formation of Calcium Hydroxide or Slaked lime takes place.

Now, a greenhouse gas is passed through 'X', it turns milky due to the formation of a substance 'Y'.

Greenhouse gas is Carbon dioxide.

(When Carbon dioxide passed through Slaked lime then milky solution is formed due to insoluble suspension of calcium carbonate.)

Ca(OH)2 + CO2 = CaCO3 + H2O

When Calcium Hydroxide reacts with the carbon-dioxide formation of Calcium Carbonate and water takes place.

The above reaction is Double Displacement Reaction because exchange of ions takes place.

Substance Y is Calcium carbonate.