CBSE Class 10 Science 2017 · Paper 31/1/3 · Question 7

Carbon and its Compounds 3 marks Medium

Complete the following chemical equations :

(i) $C_{2} H_{5} OH + O_{2} ⟶$
(ii) $C_{2} H_{5} OH Conc.H_{2} SO_{4} 443K$
(iii) $CH_{3} COOH + NaHCO_{3} ⟶$

Answer

Ethanol burns to give $CO_{2}$ and water, dehydrates to ethene at 443 K, and ethanoic acid reacts with sodium hydrogencarbonate to give sodium ethanoate.

(i) Combustion:

C_{2} H_{5} OH + 3 O_{2} \to 2 CO_{2} + 3 H_{2} O

+ heat + light (ii) Dehydration:

C_{2} H_{5} OH conc. H_{2} SO_{4} 443 K CH_{2} = CH_{2} + H_{2} O

(ethene and water) (iii)

CH_{3} COOH + NaHCO_{3} \to CH_{3} COONa + H_{2} O + CO_{2}

(sodium ethanoate, water and carbon dioxide)

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CBSE Class 10 Science 2017 · Paper 31/1/3 · Question 7

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