Chapter 04 Carbon and its Compounds Questions-02
Questions
1. How many structural isomers can you draw for pentane?
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Answer
Three structural isomers are possible for pentane.
(i)
$ CH_3-CH_2-CH_2-CH_2-CH_3 $
(ii)
(iii)
2. What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?
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Answer
The two features of carbon that give rise to a large number of compounds are as follows: (i) Catenation - It is the ability to form bonds with other atoms of carbon.
(ii) Tetravalency - With the valency of four, carbon is capable of bonding with four other atoms.
3. What will be the formula and electron dot structure of cyclopentane?
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Answer
The formula for cyclopentane is $C_5H_{10}$. Its electron dot structure is given below.
4. Draw the structures for the following compounds
(i) Ethanoic acid
(ii) Bromopentane
(iii) Butanone
(iv) Hexanal.
Are structural isomers possible for bromopentane?
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Answer
Are structural isomers possible for bromopentane?
(i)
(ii) There are many structural isomers possible for bromopentane. Among them, the structures of three isomers are given.
(iii)
(iv)
5. How would you name the following compounds?
(i) $CH_3-CH_2-Br$
(ii) $ H-\stackrel{H}{\stackrel{\text{|}}{C}}=O $
(iii) $ H-\underset{H}{\underset{\text{|}}{\stackrel{H}{\stackrel{|}{C}}}}-\underset{H}{\underset{\text{|}}{\stackrel{H}{\stackrel{|}{C}}}}-\underset{H}{\underset{\text{|}}{\stackrel{H}{\stackrel{|}{C}}}}-\underset{H}{\underset{\text{|}}{\stackrel{H}{\stackrel{|}{C}}}}-C \equiv C-H $
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Answer
(i) Bromoethane
(ii) Methanal (formaldehyde)
(iii) Hexyne
