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A solution of a substance ‘X’ is used for white washing. (i) Name the substance ‘X’ and write its formula. - Science

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A solution of a substance ‘X’ is used for white washing.
(i) Name the substance ‘X’ and write its formula.
(ii) Write the reaction of the substance ‘X’ named in (i) above with water.

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Solution

(i) The substance ‘X’ is calcium oxide. Its chemical formula is CaO.
(ii) Calcium oxide reacts vigorously with water to form calcium hydroxide (slaked lime).
CaO (s)                              + H2O (l) → Ca(OH)2 (aq)
Calcium Oxide (Quick Lime) + Water    → Calcium Hydroxide (Slaked Lime)

Concept: Types of Chemical Change or Chemical Reaction - Direct Combination (or Synthesis) Reaction
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APPEARS IN

NCERT Class 10 Science
Chapter 1 Chemical Reactions and Equations
Q 1 | Page 10
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