Organic Chemistry – Some Basic Principles and Techniques · Question 58

The IUPAC name of [figure] is

1. 1-chloro-1-oxo-2, 3-dimethylpentane
2. 2-ethyl-3-methylbutanoyl chloride
3. 2, 3-dimethylpentanoyl chloride
4. 3, 4-dimethylpentanoyl chloride.

The general molecular formula, which represents the homologous series of alkanols is

1. CnH2n+2O
2. CnH2nO2
3. CnH2nO
4. CnH2n+1O

Names of some compounds are given. Which one is not in IUPAC system?

1. CH3-CH2-CH2- CH2CH3 |CH- CH3 |CH-CH2CH3 3-Methyl-4-ethylheptane
2. CH3- OH |CH- CH3 |CH-CH3 3-Methyl-2-butanol
3. CH3-CH2- CH2 \|C- CH3 |CH-CH3 2-Ethyl-3-methylbut-1-ene
4. CH3-C C-CH(CH3)2 4-Methyl-2-pentyne

Which amongst the following is the most stable carbocation?

1. CH3
2. CH3 CH2
3. CH3- CH3 | CH
4. CH3- CH3 | CH3 | C

Name of the compound given below is [figure]

1. 4-ethyl-3-methyloctane
2. 3-methyl-4-ethyloctane
3. 2,3-diethylheptane
4. 5-ethyl-6-methyloctane

Which one of the following orders of acid strength is correct ?

1. RCOOH > ROH > HOH > HC CH
2. RCOOH > HOH > ROH > HC CH
3. RCOOH > HOH > HC CH > ROH
4. RCOOH > HC CH > HOH > ROH

Which one of the following is a free-radical substitution reaction ?

1. [figure]
2. [figure]
3. [figure]
4. CH3CHO + HCN CH3CH(OH)CN

IUPAC name of the following is CH2=CH-CH2-CH2-C CH

1. 1-hexyne-5-ene
2. 1,5-hexenyne
3. 1-hexene-5-yne
4. 1,5-hexynene

CH2- O \|C-CH3 and CH2= O |C-CH3 are

1. resonating structures
2. tautomers
3. geometrical isomers
4. optical isomers

The incorrect IUPAC name is

1. CH3- O \|C- CH3 |CH-CH3 2-methyl-3-butanone
2. CH3- CH3 |CH- CH2CH3 |CH-CH3 2,3-dimethylpentane
3. CH3-C CCH(CH3)2 4-methyl-2-pentyne
4. CH3 Cl |CH Br |CHCH3 2-bromo-3-chlorobutane