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Model Paper 7 — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryModel Paper 75 Marks
Question
1. What is the general molecular formula of saturated monohydric alcohols?
2. Write structural formulae for compounds named as-
a. 1-Bromoheptane
b. 5-Bromoheptanoic acid
✓

Answer

1. Monohydric alcohols are the compounds derived from an alkane by replacing one H by - OH group.
Example:
$
\underset{\text { Methane }}{CH_4} \xrightarrow{\text { replacing } H \text { with } OH} \underset{\text { Methanol }}{CH_3-OH}
$
Therefore, the general molecular formula of saturated monohydric alcohols is $C _{ n } H _{2 n +1} OH$.
2. i. Structural formula of 1-Bromoheptane:
$
CH_3-CH_2-CH_2-CH_2-CH_2-CH_2-CH_2 Br
$
ii. Structural formula of 5-Bromoheptanoic acid:
$
CH_3-CH_2-CH(Br)-CH_2-CH_2-CH_2-COOH
$

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