(a) Why are covalent compounds generally poor conductors of electricity?
(b) Name the following compound:

(c) Name the gas evolved when ethanoic acid is added to sodium carbonate. How would you prove the presence of this gas?

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Solution

(a) As covalent bonds do not break easily (dissociate), so they do not form ions which help in conduction of electricity. Therefore, covalent compounds don't conduct electricity as they don't have free electrons or ions.

(b) The given compound contains 3 carbons and a ketone functional group so it would be called as 'propanone'.

(c) When ethanoic acid reacts with sodium carbonate, sodium ethanoate, carbon dioxide, and water are formed.

$2 {CH}_{3} COOH + {Na}_{2} {CO}_{3} \to {CH}_{3} COONa + {CO}_{2} + H_{2} O$

To test the presence of formed gas, we pass this gas from lime water. Upon reaction, lime water turns milky, which confirms the presence of carbon dioxide in the reaction.

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Name the gas evolved when ethanoic acid is added to sodium carbonate. How would you prove the presence of this gas ?

Describe an activity to find out how ethanoic acid reacts with sodium carbonate. Name the gas evolved. How can the gas be tested ?

Q. An organic compound 'A' produces a gas with brisk effervescence when sodium bicarbonate is added to it. The compound 'A' contains the same number of carbons as in ethane. The compound 'A' reacts with ethanol to form a sweet-smelling compound 'C' in presence of conc.

H_{2} S O_{4}

acid. Then the name of compound A and the gas evolved is :

Question 47
A salt X is formed and gas is evolved when ethanoic acid reacts with sodium hydrogen carbonate. Name the salt X and the gas evolved. Describe an activity and draw the diagram of the apparatus to prove that the evolved gas is one which you have named. Also, write chemical equation of the reaction involved.

Q. (a) When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas. Y Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the one which you have named. Also write the chemical equation of the reaction involved.
(b) Give any two uses of ethanoic acid.

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(a) Why are covalent compounds generally poor conductors of electricity? (b) Name the following compound: (c) Name the gas evolved when ethanoic acid is added to sodium carbonate. How would you prove the presence of this gas?

(a) Why are covalent compounds generally poor conductors of electricity?
(b) Name the following compound:

(c) Name the gas evolved when ethanoic acid is added to sodium carbonate. How would you prove the presence of this gas?