Chemistry Class-11: Chapter –13. Hydrocarbons Part – 5

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Question: 32

Nucleophiles and electrophiles are reaction intermediates having electron rich and electron deficient centers respectively. Hence, they tend to attack electron deficient and electron rich centres respectively. Classify the following species as electrophiles and nucleophiles.

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

(viii)

Answer:

Question: 33

The relative reactivity of hydrogen’s towards chlorination is . Calculate the percentages of all monochlorinated products obtained from 2-methylbutane.

Answer:

2-Methyl butane is . Possible compounds are A, B and C given below:

Total Amount of monohaloginated compounds

Question: 34

Write the structures and names of products obtained in the reactions of sodium with a mixture of 1-iodo-2-methylpropane and 2-iodopropane.

Answer:

Question: 35

Write hydrocarbon radicals that can be formed as intermediates during monochlorination of 2-methylpropane? Which of them is more stable? Give reasons.

Answer:

Radical I is tertiary where as radical II is primary. Radical I is more stable due to hyperconjugation.

Question: 36

An alkane is obtained as the only product on subjecting a primary alkyl halide to Wurtz reaction. On monobromination this alkane yields a single isomer of a tertiary bromide. Write the structure of alkane and the tertiary bromide

Answer:

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