Organic Chemistry Some Basic Principles and Techniques Test

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Organic Chemistry Some Basic Principles and Techniques Test - 21

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Weekly Quiz Competition

Question 1
1 / -0

The functional group, present in $$CH_3COOC_2H_5$$ is :

A
ketonic

B
aldehydic

C
ester

D
carboxylic

Solution

Ester is represented by the formula$$\quad \quad O\\ \quad \quad \parallel \\ R-C-O-R'$$. It is ethyl acetate.
Question 2
1 / -0

The IUPAC name of the following compound is :
$$CH_2=CH-CH(CH_3)_2$$

A
$$1,1$$-Dimethyl $$-2-$$ propene

B
$$3$$-Methyl$$-1-$$ butene

C
$$2$$-Vinyl propane

D
$$1$$-Isopropyl ethylene

Solution

3-Methyl1 butene
Question 3
1 / -0

The IUPAC name of $$(CH_3)_2CHCH_2CH_2Br$$ is :

A
$$1$$-Bromopentane

B
$$2-$$Methyl$$-4-$$bromo pentane

C
$$1$$-Bromo$$-3-$$ methyl butane

D
$$2$$-Methyl$$-3-$$ bromo pentane

Solution

1-Bromo3 methyl butane
Question 4
1 / -0

The general formula of an ester (where R represents an alkyl group) is :

A
R-OH

B
R-COOH

C
R-COOR

D
R-H

Solution

Ester is formed by reaction of an acid with alcohol with formula$$\quad \quad O\\ \quad \quad \parallel \\ R-C-O-R'$$. It has sweet odor giving confirmation of ester group.
Question 5
1 / -0

The common and IUPAC names of the group of $$(CH_3)_2CHCH_2-$$ respectively are :

A
Isobutyl, 2 - Methylpropyl

B
Isobutyl, 1 - Methylpropyl

C
Tert-butyl, 1, 1 - Dimethylethyl

D
Sec-butyl, 2 - Methylpropyl

Solution

Here longest chain contains 3 carbon in which one methyl group is attached to carbon at position 2. Therefore, its common name is isobutyl and IUPAC is methylpropyl.
Question 6
1 / -0

The functional group in an alcohol is :

A
$$-\overset{\overset{\displaystyle O}{||}}{C}-O-$$

B
$$-\overset{\overset{\displaystyle O}{||}}{C}-OH$$

C
$$-OH$$

D
$$-\overset{\overset{\displaystyle O}{||}}{C}-H$$

Solution

An alcohol is any organic compound in which the hydroxy functional group (-OH) is bound to a saturated carbon atom. Ethyl alcohol is the predominant alcohol in alcoholic beverages.
Question 7
1 / -0

$$Z-\overset{Z}{\overset{|}{\underset{Z}{\underset{|}{X}}}}-\overset{Z}{\overset{|}{\underset{Z}{\underset{|}{X}}}}-\overset{Z}{\overset{|}{X}}=Y$$

Given here is the structural formula of the compound formed of X, Y and Z elements.

X is a tetravalent element and exhibits catenation property. Y belongs to group 16 and period 2. Z is the only non-metal present in the reactivity series.

The next member of homologous series of the above compound is:

A
$$CH_3 CHO$$

B
$$CH_3 CH_2 CH_2 CH_2 CHO$$

C
$$CH_3 CH_2 CH_2 CHO$$

D
none of these

Solution

X is carbon, a tetravalent element that exhibits catenation property.

Y is oxygen, element that to group 16 and period 2.

Z is hydrogen, the only non-metal present in the reactivity series.

This compound has 3 carbon atoms and can be written as:
$$H-\overset{H}{\overset{|}{\underset{H}{\underset{|}{C}}}}-\overset{H}{\overset{|}{\underset{H}{\underset{|}{C}}}}-\overset{H}{\overset{|}{C}}=O$$

So, the next member of homologous series of the above compound will have 4 carbon atoms.
Question 8
1 / -0

The IUPAC name of the compound having the formula $$(CH_3)_3CCH=CH_2$$ is :

A
$$3,3,3$$-Trimethyl$$-1-$$propene

B
$$1,1,1$$-Trimethyl-$$1$$-propene

C
$$3,3$$-Dimethyl-$$1$$-butene

D
$$1,1$$-Dimethyl$$-2$$-butene

Solution

3,3-Dimethyl-1-butene
Question 9
1 / -0

The IUPAC name of $$(CH_3)_2CHCH_3$$ is:

A
$$2$$-methylpropane

B
$$2,2$$-dimethylethane

C
trimethylmethane

D
none of these

Solution

The IUPAC name of $$(CH_3)_2CHCH_3$$ is $$2$$-methylpropane. The parent hydrocarbon contains $$3 C$$ atoms and is named as propane. A methyl substituent is present on second $$C$$ atom.
Question 10
1 / -0

Ammonium nitrate on heating gives ___________.

A
nitric oxide

B
nitrogen

C
nitrogen peroxide

D
nitrous oxide

Solution

$${NH}_{4}{NO}_{3}\xrightarrow [ ]{ on heating } 2{H}_{2}O+{N}_{2}O$$
(NItrous oxide)

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Organic Chemistry Some Basic Principles and Techniques Test - 21

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Organic Chemistry Some Basic Principles and Techniques Test - 21

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Question 1

ketonic

aldehydic

ester

carboxylic

Solution

Question 2

$$1,1$$-Dimethyl $$-2-$$ propene

$$3$$-Methyl$$-1-$$ butene

$$2$$-Vinyl propane

$$1$$-Isopropyl ethylene

Solution

Question 3

$$1$$-Bromopentane

$$2-$$Methyl$$-4-$$bromo pentane

$$1$$-Bromo$$-3-$$ methyl butane

$$2$$-Methyl$$-3-$$ bromo pentane

Solution

Question 4

R-OH

R-COOH

R-COOR

R-H

Solution

Question 5

Isobutyl, 2 - Methylpropyl

Isobutyl, 1 - Methylpropyl

Tert-butyl, 1, 1 - Dimethylethyl

Sec-butyl, 2 - Methylpropyl

Solution

Question 6

$$-\overset{\overset{\displaystyle O}{||}}{C}-O-$$

$$-\overset{\overset{\displaystyle O}{||}}{C}-OH$$

$$-OH$$

$$-\overset{\overset{\displaystyle O}{||}}{C}-H$$

Solution

Question 7

$$CH_3 CHO$$

$$CH_3 CH_2 CH_2 CH_2 CHO$$

$$CH_3 CH_2 CH_2 CHO$$

none of these

Solution

Question 8

$$3,3,3$$-Trimethyl$$-1-$$propene

$$1,1,1$$-Trimethyl-$$1$$-propene

$$3,3$$-Dimethyl-$$1$$-butene

$$1,1$$-Dimethyl$$-2$$-butene

Solution

Question 9

$$2$$-methylpropane

$$2,2$$-dimethylethane

trimethylmethane

none of these

Solution

Question 10

nitric oxide

nitrogen

nitrogen peroxide

nitrous oxide

Solution

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