CBSE Class 10 Science 2017 Outside Delhi Term II Set 1 Paper

Question : 1 of 12

Marks: +1, -0

Write the molecular formula of the

2^{\;\text "nd "\;}

and

3^{\;\text "rd "\;}

member of the homologous series where the first member is ethyne.

Solution:

(i)

{\CH}_3 {\C} ≡ {\CH}

(propyne),

n=3

(ii)

{\CH}_3 {\CH}_2 {\C} ≡ {\CH}

(Butyne),

n=4

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