Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Pick out the correct statements from the following and choose the correct answer from the codes given below

1. Hexa-1, 5-diene is a conjugated diene
2. Prop-1, 2-diene is conjugated diene
3. Hexa-1, 3-diene is a conjugated diene
4. Buta-1, 3-diene is an isolated diene
5. Prop-1, 2-diene is a cumulative diene

• 1, 2

• 3, 5

• 2, 3

• 4, 5

Select R-isomers from the following

• I and III

• II, IV and V

• I, II and III

• II and III

The correct IUPAC name of the acid

• Z-3-ethyl-4methyl hex-3-en-1-oic acid

• E-3-ethyl-4-ethylhex-3-en-1-oic acid

• Z-3-ethyl-4-methyl hexanoic acid

• Z-3, 4-diethylpent-3-en-1-oic acid

(CH₃)₃CMgCl on reaction with D₂O produces

• (CH₃)₃COD

• (CD₃)₃CH

• (CH₃)₃CD

• (CD₃)₃CD

Which of the following process is suitable for the purification of aniline?

• Simple distillation

• Fractional distillation

• Fractional crystallisation

• Steam distillation

Of the isomeric hexanes, the isomers that give the minimum and maximum number of monochloro derivatives are respectively

• 3-methylpentane and 2,3-dimethylbutane

• 2,3-dimethylbutane and n-hexane

• 2,2-dimethylbutane and 2-methylpentane

• 2,3-dimethylbutane and 2-methylpentane

Acyclic stereoisomer having the molecular formula C₄H₇Cl are classified and tabulated. Find out the correct set of numbers

• Geometrical	optical
  6	2

• Geometrical	optical
  4	2

• Geometrical	optical
  6	0

• Geometrical	optical
  6	0

Compare List-I and List-II and choose the correct matching codes from the choices given.

List - I	List - II
A. Glycerol	i. Sublimation
B. o-nitrophenol	ii. Beilstein's test
C. Anthracene	iii. Victor- Meyer's method
D. Halogens	iv. Steam distillation
E. Molecular weight	v. Vaccum distillation vi. Eudiometry

• A - v; B - iv; C - i; D - ii; E - iii

• A - iv; B - v; C - i; D - vi; E - ii

• A - vi; B - iv; C - i; D - iii; E - ii

• A - v; B - iv; C - vi; D - ii; E - iii

Pick out the wrong statement.

• Toluene shows resonance

•  is non-aromatic

• The hybrid state of carbon in carbonyl group is sp² 

• The hyper-conjugative effect is known as no bond resonance

The number of isomers for the compound with the molecular formula C₂BrClFI is

• 3

• 4

• 5

• 6