General Organic Chemistry & Isomerism · JEE Main previous year questions

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2002 5 questions

Q1652002 · 27 Apr 2002 · Shift 1
Arrangement of $(C H_{3})_{3} C$ -, $(C H_{3})_{2} CH$ -, $C H_{3}$ - $C H_{2}$ - when attached to benzyl or an unsaturated group in increasing order of inductive effect is
1. A. $(C H_{3})_{3} C$ - < $(C H_{3})_{2} CH$ - < $C H_{3}$ - $C H_{2}$
2. B. $C H_{3}$ - $C H_{2}$ - < $(C H_{3})_{2} CH$ - < $(C H_{3})_{3} C$ -
3. C. $(C H_{3})_{2} CH$ - < $(C H_{3})_{3} C$ - < $C H_{3}$ - $C H_{2}$
4. D. $(C H_{3})_{3} C$ - < $C H_{3}$ - $C H_{2}$ - < $C H_{3})_{2} CH$ -
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Answer: B
Q1662002 · 27 Apr 2002 · Shift 1
A similarity between optical and geometrical isomerism is that
1. A.each forms equal number of isomers for a given compound
2. B.if in a compound one is present then so is the other
3. C.both are included in stereoisomerism
4. D.they have no similarity
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Answer: C
Q1672002 · 27 Apr 2002 · Shift 1
Which of the following does not show geometrical isomerism?
1. A.1,2-dichloro-1-pentene
2. B.1,3-dichloro-2-pentene
3. C.1,1-dichloro-1-pentene
4. D.1,4-dichloro-2-pentene
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Answer: C
Q2002002 · 27 Apr 2002 · Shift 1
Which of the following compounds has wrong $I U P A C$ name ?
1. A. $C H_{3} - C H_{2} - C H_{2} - COO - C H_{2} C H_{3}$ $⟶$ ethyl butanoate
2. B. $C H_{3} - CH (CH) - C H_{2} - CHO$ $⟶$ 3 - methyl-butanal
3. C. $C H_{3} - CH (OH) - CH (C H_{3}) - C H_{3}$ $⟶$ 2 - methyl- 3 -butanal
4. D. $C H_{3} - CH (C H_{3}) - CO - C H_{2} - C H_{3}$ $⟶$ 2 - methyl-3-pentanone
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Answer: C
Q2012002 · 27 Apr 2002 · Shift 1
Following types of compounds (as $I, I I$ ) I: $C H_{3} CH = CHC H_{3}$ II: $C H_{3} CH (OH) C H_{2} C H_{3}$ are studied in terms of isomerism in :
1. A.chain isomerism
2. B.position isomerism
3. C.conformers
4. D.stereoisomerism
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Answer: D