Chemistry Class-11: Chapter – 12. The Organic Chemistry Some Basic Principles and Techniques Part – 4 (For CBSE, ICSE, IAS, NET, NRA 2023)
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Question: 19
Which of the following pairs are position isomers?
(i) I and II
(ii) II and III
(iii) II and IV
(iv) III and IV
Answer: (ii)
Question: 20
Which of the following pairs are not functional group isomers?
(i) II and III
(ii) II and IV
(iii) I and IV
(iv) I and II
Answer: (i) , (iii)
Question: 21
Nucleophile is a species that should have
(i) A pair of electrons to donate
(ii) Positive charge
(iii) Negative charge
(iv) Electron deficient species
Answer: (i) , (iii)
Question: 22
Hyperconjugation involves delocalisation of ________.
(i) Electrons of carbon-hydrogen σ bond of an alkyl group directly attached to an atom of unsaturated system.
(ii) Electrons of carbon-hydrogen σ bond of alkyl group directly attached to the positively charged carbon atom.
(iii) π-electrons of carbon-carbon bond
(iv) Lone pair of electrons
Answer: (i) , (ii)
III. Short Answer Type
Note: Consider structures I to VII and answer the questions 23 – 26.
(I)
(II)
(III)
(IV)
(V)
(VI)
(VII)
Answer:
Question: 23
Which of the above compounds form pairs of metamers?
Question: 24
Identify the pairs of compounds which are functional group isomers.
Question: 25
Identify the pairs of compounds that represents position isomerism.
Question: 26
Identify the pairs of compounds that represents chain isomerism.
Question: 27
For testing halogens in an organic compound with solution, sodium extract (Lassaigne՚s test) is acidified with dilute . What will happen if a student acidifies the extract with dilute in place of dilute ?
Answer:
White ppt. of will be formed.
Question: 28
What is the hybridisation of each carbon in .