(a) An organic compound $X$ of molecular formula $C_{2} H_{4} O_{2}$ gives brisk effervescence with sodium hydrogencarbonate. Give the name and formula of $X$ .
(b) A mixture of ethyne (acetylene) and oxygen is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
(c) Name a chemical reaction which is characteristic of unsaturated hydrocarbons (like alkenes and alkynes).

Open in App

Solution

(a) Ethanoic acid, $C H_{3} C O O H$ gives brisk effervescence with sodium hydrogen carbonate.

(b) A mixture of ethyne and air is not used for welding because the burning of ethyne in air produces a sooty flame (due to incomplete combustion) which is not hot enough to melt metals for welding.

(c) Addition reactions are a characteristic of unsaturated hydrocarbons.

Suggest Corrections

Similar questions

(a) An organic compound X of molecular formula $C_{2} H_{4} O_{2}$ gives brisk effervescence with sodium hydrogen carbonate. give the name and formula of X.
(b) A mixture of ethyne (acetylene) and oxygen is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
(c) Name a chemical reaction which is characteristic of unsaturated hydrocarbons (like alkenes and alkynes).

Q. (a) Give the name and structural formula of one member each of the following:
(i) alkane
(ii) alkene
(iii) alkyne
(iv) cycloalkane
(b) Give the common name of (i) ethyne, and (ii) ethene.
(c) Write the molecular formula and structure of benzene.

Q. A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Q. Question 2
A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Q. Question 2
A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Join BYJU'S Learning Program