Organic Chemistry Some Basic Principles and Techniques Test

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Organic Chemistry Some Basic Principles and Techniques Test - 49

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Weekly Quiz Competition

Question 1
1 / -0

IUPAC name of this...

A
3- chloro-2,3- Dimethylbutane

B
2- chloro-3,3- Dimethylbutane

C
2- chloro-2,3- Dimethylbutane

D
2- chloro-1,3- Dimethylbutane

Solution
Question 2
1 / -0

The halogen atom in aryl halide is:

A
O-and p-directing

B
m-directing

C
o,m an p-directing

D
O-and m-directing

Solution

Haloarene or aryl halide is a chemical compound containing arenes, where one or more hydrogen atoms are bonded to the aromatic ring are replaced with halogens. They are generally denoted by “Ar-X” where 'X' denotes the halogen atom attached and 'Ar' stands for the aryl group.
The halide ions, which are electron-withdrawing but ortho, para directing, are the exception.
Halogen attached to a benzene ring is somewhat deactivating due to it's -I-effect, as a result it tends to withdraw the electrons from the benzene ring, making electrophilic substitution, ortho/ para directors are positively charged so halogens, being ortho/ para directors, are positively charged.
Question 3
1 / -0

I.U.P.A.C name of

A
4 - Bromo - 3- iodo cyclohexa- 1, 3 - diene

B
1 - Bromo - 2- iodo cyclohexa- 1, 3 - diene

C
1 - Bromo - 2- iodo - 1, 3 -cyclohexadiene

D
(b) and (c) both are correct

Solution
Question 4
1 / -0

The IUPAC name of

A
(Z)-4, 6-Dimethyloct-4-en-3-one

B
(E)-4, 6-Dimethyloct-4-en-3-one

C
(Z)-4, 6-Dimethyloct-4-en-6-one

D
(E)-3, 5-Dimethyloct-4-en-6-one

Solution

The compound is (z) -4, 6 - Dimethyloct - 4 - en - 3 - one.

Hence, option A is correct.
Question 5
1 / -0

The IUPAC name of

A
N,N-dimethylmethanal

B
N,N-dimethylmethanamide

C
N,N-dimethylcarbaldehyde

D
None

Solution
Question 6
1 / -0

In the structure, the number of functional groups present is :

A
2

B
4

C
5

D
3

Solution

1. Amide group, 2. Carboxylic group, 3. Hydroxyl group, 4. Cyanide group

Option B is correct
Question 7
1 / -0

The $$IUPAC$$ name of $$CH_3 - \underset{CH_3}{\underset{\!\!\!\!\!|}{CH}} - CH_2 - \overset{O}{\overset{||}{C}} - Br$$ is :

A
$$2-$$Methylbutanoyl bromide

B
$$2$$-Methylbutan $$4-$$ bromide

C
$$1-$$Bromo-$$-$$Methylbutanone

D
$$3-$$Methylbutanoyl bromide

Solution
Question 8
1 / -0

In the given compound the correct lowest set of locants are :

A
3,3,4,5

B
3,4,5,5

C
4,5,3,3

D
None of these

Solution

Locant is the number of the carbon atom on which the substituent is located. Here the longest chain contains 7 carbon atoms.
Now if we start numbering from the left hand side, the numbering sequence will be 3,3,4,5. Total will be (3+3+4+5)=15. If we start from the right hand side then the numbering sequence will be (3+4+5+5)=17. We need the least set of locants So the correct order is 3,3,4,5. Hence the correct option is A
Question 9
1 / -0

Give the IUPAC name of the alkene

A
$$Z-3 methyl-4-propyl-3-octene$$

B
$$E-3 methyl-4-propyl-3-octene$$

C
$$E-4 butyl-3-methyl-3- heptene$$

D
$$E-2 ethyl-3-propyl-3- heptene$$

E
$$Z-2-ethyl-2-propyl-2-heptene$$

Solution
Question 10
1 / -0

The IUPAC name of acraldehyde is:

A
Prop-1-ene-2-al

B
Prop-2-ene-3-al

C
Prop-2-ene-1-al

D
Prop-ene-1-al

Solution