A solution of a substance 'X' is used for whitewashing.
(i) What is X?
(ii) Write the reaction of the substance x with water.

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Solution

(i) The substance ‘X’ used for whitewashing is quicklime (calcium oxide). Its formula is CaO.

(ii) When quicklime is mixed with water, the following reaction takes place:

$C a O (s) + H 2 O (l) \to C a (O H) 2 (a q) + h e a t$

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A solution of a substance ‘X’ is used for white washing.

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A solution of a substance 'X' is used for white washing.
1. Name the substance 'X' and write its formula.
2. Write the reaction of the substance 'X' named in (i) above with water.[2 MARKS]

Q. Question 1.2

A solution of a substance ‘X’ is used for white washing.

Write the reaction of the substance ‘X’ named above with water.

Q. A solution of a substance 'X' is used for white washing.

Name the substance 'X' and write its formula.

State whether the given statement is true or false:

A solution of a substance

X

is used for white washing. The reaction of the substance

X

is with water is:

C a O (s) C a l c i u m o x i d e + H_{2} O (l) W a t e r \to C a (O H)_{2} (a q) C a l c i u m h y d r o x i d e

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A solution of a substance 'X' is used for whitewashing. (i) What is X? (ii) Write the reaction of the substance x with water.

(i) The substance ‘X’ used for whitewashing is quicklime (calcium oxide). Its formula is CaO. (ii) When quicklime is mixed with water, the following reaction takes place: CaO(s)+H2O(l)→Ca(OH)2(aq)+heat

A solution of a substance 'X' is used for whitewashing.
(i) What is X?
(ii) Write the reaction of the substance x with water.

(i) The substance ‘X’ used for whitewashing is quicklime (calcium oxide). Its formula is CaO.

(ii) When quicklime is mixed with water, the following reaction takes place:

$C a O (s) + H 2 O (l) \to C a (O H) 2 (a q) + h e a t$