NCERT Class X Science Class: Chapter – 4. Carbon and Its Compounds – Part-7 (For CBSE, ICSE, IAS, NET, NRA 2023)

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Short Answer Questions

Question 30:

Draw the electron dot structure of ethyne and also draw its structural formula


The formula of ethyne is

Its structure contains Carbon atoms attached by triple bond and each Carbon attached to a Hydrogen atom by single bond.

Electronic Dot Structure of Ethyne

Question 31:

Write the names of the following compounds


Image Option (A) Compound


Image Option (B) Compound


Image Option (C) Compound


Image Option (D) Compound


(a) Pentanoic acid:

Valeric acid, or Pentanoic acid, is a straight chain alkyl carboxylic acid with the chemical formula

(b) Butyne:

Any isomer of molecular formula containing an alkyne

(c) Heptanal:

A chemical structure of a molecule includes the arrangement of atoms and the chemical bonds that hold the atoms together. The Heptanal molecule contains a total of 21 bond (s) . There are non-H bond (s) , 1 multiple bond (s) , 5 rotatable bond (s) , 1 double bond (s) and 1 aldehyde (s) .

(d) Pentanol:

Pentanol is a generic term for any compound that has carbons, all single bonds, and an alcohol. There are several different structures that pentanol can take, but they are all related due to the chemical formula of