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Hydrocarbons

Question

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Calculate the number of sigma (σ) and pi $open parentheses straight pi close parentheses$ bonds in the following structures:

Solution

(i) σ bonds 33,

straight pi

bonds 2
(ii) σ bonds 7,

straight pi

bonds 4
(iii) σ bonds 23,

straight pi

bonds 1
(iv) σ bonds 41,

straight pi

bonds 1

Some More Questions From Hydrocarbons Chapter

Alkanes are less reactive. Why?

Out of n-pentane, isopentane and neopentane which has lower boiling point?

During the pyrolysis of alkanes C-C bonds break in preference to C-H bond. Why?

Define cracking.

What is the function of iodic acid in the iodination of alkanes? Can we use any other substance in its place?

What is alternation effect?

Arrange the following compounds in order of their increasing boiling points:
n-Pentane, n-Hexane, Ethane, 2-2-Dimethylpentane, 2-Methylpentane.

Why is light or heat necessary to initiate chlorination reaction of alkanes?

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