Organic Chemistry Some Basic Principles and Techniques Test

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Organic Chemistry Some Basic Principles and Techniques Test - 50

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Weekly Quiz Competition

Question 1
1 / -0

The IUPAC name of given compound is:

A
4-Ethylcyclobut-2-en-l-ol

B
4-ethylcyclobut-2-en-3-ol

C
3-ethylcyclobut-1-en-2-ol

D
2-ethylcyclobut-3-en-l-ol

Solution

As the alcohol functional group has highest priority so the carbon attached to OH group should get lowest locant number.
Question 2
1 / -0

The major product formed when a 3,3- dimethyl butan-2-ol is heated with concentrated sulphuric acid is:

A
2,3- dimethyl-2-butene

B
2,3-dimethyl-1-butene

C
3,3-dimethy-1-butene

D
cis and trans isomers of 2,3- dimethy-1-butene

E
cis and trans isomer of 3,3- demethy-1- butene.

Solution
Question 3
1 / -0

Correct IUPAC name is

A
3-ethylhex-2-ene

B
3-ethypent-2-ene

C
3-ethylpent-3-ene

D
3-propylpent-2-ene

Solution
Question 4
1 / -0

The correct IUPAC name

A
2-ethoxy-5-chloropentane

B
1-chloro-4-ethoxy-4-methylbutane

C
1-chloro-4-ethoxypentane

D
ethyl-1-chloropentyl ether

Solution

2-ethoxy-5-chloropentane
Basic principles for naming an organic compound
1) Identification of the parent hydrocarbon chain.
2) Identify the parent functional group with the highest order of precedence.
3) Identify side chains.
4) Identify the remaining functional groups.
5) Identify the double or triple bonds.
6) The numbering of the chain. First number the chain on both the sides and then choose the numbering.
7) The numbering of various substituents and bonds with their locants. If there is more than one of the same type of the substituent/dobule bond. A prefix is added for the same.
Question 5
1 / -0

$$M{e_2}CCl\,C{H_2}CH = CH - CH = CH - COOH$$
$$I.U.P.A.C$$ name of this is :-

A
$$7-Chloro-7-methyloctan-2,4-dienoic$$ $$acid.$$

B
$$7-Chloro-7,7-dimethyl-2,-3-heptadienoic$$ $$acid.$$

C
$$2-Chloro-2-methyl-4,5-octadiene-7-oic$$ $$acid.$$

D
$$7-Chloro-7-methyl oct-2,-3-heptadienoic$$ $$acid.$$

Solution
Question 6
1 / -0

When formaldehyde and potassium hydroxide are heated , we get

A
methyl

B
alcohol

C
methyl alcohol

D
none of these

Solution

When formaldehyde and potassium hydroxide are heated, we get methyl alcohol and formic acid. it is Cannizzaro reaction.
Question 7
1 / -0

The correct IUPAC name of $$CH_3CH_2CH(CH_3)CH(CH_3)CH(C_2H_5)_2$$ is :

A
4-Ethyl-3-methylhexane

B
3-Ethyl-4,5-dimethylheptane

C
4-Methyl-3-ethylhexane

D
2,4-Diethylpentane
Question 8
1 / -0

$$IUPAC$$ Name of is :

A
$$2-Ethyl-3-methyl epoxy\ butane$$

B
$$4-Ethyl-4-methyl\ oxetane$$

C
$$2-Ethyl-4-methyl\ oxetane$$

D
$$2-Ethyl-2-methyl\ oxetane$$
Question 9
1 / -0

In which of the following pair of elements the pi-bond formation tendency is maximum

A
S and O

B
Si and O

C
P and O

D
Cl and O

Solution
Question 10
1 / -0

IUPAC name for the compound is:

A
$$\alpha$$ -methyl cyclohexanone

B
2-Methyl cyclohexanone

C
heptanone-2

D
methyl cyclohexanone

Solution

The ketone is functional group here and methyl acts as substituent.

option B is correct.