Organic Chemistry Some Basic Principles and Techniques Test

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Organic Chemistry Some Basic Principles and Techniques Test - 23

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Weekly Quiz Competition

Question 1
1 / -0

IUPAC name of the given compound is:

A
Hexanedione -$$2, 4$$-ic-$$1$$-oic acid

B
$$2, 4$$-dioxohexanoic acid

C
Propionyl-dioxo-oic acid

D
None of these

Solution

The priority will be given to -COOH group.

The name of the compound would be 2, 4 -dioxohexanoic acid.

Option (B) is correct.
Question 2
1 / -0

$$\displaystyle { CCl }_{ 3 }-CHO$$ in IUPAC system is called :

A
Chloral

B
1, 1, 1-trichloroethanal

C
2, 2, 2-trichloroethanal

D
Trichloroacetaldehyde

Solution

2,2,2,-Trichloroethane
Question 3
1 / -0

Which of the following is correct about the number of bonds formed by atoms of different elements in acetaldehyde?
(Report your answer in the ratio of $$H:O:C$$)

A
4:2:2

B
4:1:2

C
4:1:3

D
3:3:3

Solution

$${ CH }_{ 3 }CHO-Acetaldehyde\\ No\quad of\quad atoms\quad of\quad H:O:C=4:1:2$$
Question 4
1 / -0

Which of the following does not belong to the same homologous series?

A
$$CH_4$$

B
$$C_2H_6$$

C
$$C_3H_8$$

D
$$C_4H_6$$

Solution

methane, ethane, and propane-$${ CH }_{ 4 },{ C }_{ 2 }{ H }_{ 6 },{ C }_{ 3 }{ H }_{ 8 }-{ C }_{ n }{ H }_{ 2n+2 }$$ belong to alkane family with same general formula except $${ C }_{ 4 }{ H }_{ 6 }$$
Question 5
1 / -0

IUPAC name of $$CH_3-CH=CH-CH_3$$ is :

A
Unsymmetrical dimethyl ethylene

B
Symmetrical dimethyl ethylene

C
1,2-dimethylethene

D
2-butene

Solution

2-butene
Question 6
1 / -0

The alcohols, methanol, ethanol, propanol, butanol, etc. form a homologous series. This means that they have:

A
similar chemical properties, but gradually changing physical properties

B
similar physical properties, but gradually changing chemical properties

C
the same molecular formula, but different physical properties

D
similar physical properties and the same structural formula

Solution

A homologous series is a group of chemicals which have similar chemical properties and they share the same general formula. The physical properties of the members of the series vary gradually with increase in their atomic mass.
Question 7
1 / -0

IUPAC name of the compound is :
$$\displaystyle { CH }_{ 3 }-CO-\underset { \overset { | }{ Cl } }{ CH } -\underset { \overset { | }{ Br } }{ CH } -COOH$$

A
2-bromo-3-chloro-4-oxopentanoic acid

B
4-oxo-3-chloro-2-bromopentanoic acid

C
4-carboxybromo-3-chlorobutanone

D
None of these

Solution

$$\overset {5}{C}H_{3} - \overset {4}{C} O - \underset {\underset {Cl}{|}}{\overset {3}{C}} H - \underset {\underset {Br}{|}}{\overset {2}{C}}H - \overset {1}{C} OOH$$
$$2\ bromo-3\ chloro\ 4 - oxo\ pentanoic\ acid$$.
Question 8
1 / -0

IUPAC name of the compound is:

A
Propanetrinitrile - $$1,2,3$$

B
$$1,2,3$$-cyanopropane

C
Propane -$$1, 2, 3$$ tricarbonitrile

D
$$1, 2, 3$$-tricyanopropane

Solution

The three $$CN$$ groups attached to three $$C$$ atom chain act as three secondary suffix.
Question 9
1 / -0

Hexane exhibits chain isomerism. One of its isomers possesses two tertiary carbon atoms. Arrange the following steps in proper sequence to write IUPAC name for the respective isomer.
(a) Identification of number of carbon atoms in the main chain
(b) Writing the structure of respective isomer of hexane
(c) Numbering of carbon chain
(d) Giving position numbers for the alkyl groups attached to main chain
(e) Identification of nature of tertiary carbon atom

A
$$b\ a\ c\ e\ d$$

B
$$e\ a\ b\ f\ d$$

C
$$b\ e\ c\ a\ d$$

D
$$e\ b\ a\ c\ d$$

Solution

the sequence to write IUPAC name for the respective isomer.
(b) Writing the structure of respective isomer of hexane
(e) Identification of nature of tertiary carbon atom
(c) The numbering of a carbon chain
(a) Identification of a number of carbon atoms in the main chain
(d) Giving position numbers for the alkyl groups attached to the main chain
Question 10
1 / -0

The part of IUPAC name which indicates saturation or unsaturation is:

A
root word

B
primary suffix

C
secondary suffix

D
prefix

Solution

Unsaturation is double or triple bond present in the carbon chain which in IUPAC is used as primary suffix like methene or methyne for alkenes and alkynes respectively depending on the number of carbon atoms present in the chain.

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Organic Chemistry Some Basic Principles and Techniques Test - 23

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Organic Chemistry Some Basic Principles and Techniques Test - 23

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SHARING IS CARING

Question 1

Hexanedione -$$2, 4$$-ic-$$1$$-oic acid

$$2, 4$$-dioxohexanoic acid

Propionyl-dioxo-oic acid

None of these

Solution

Question 2

Chloral

1, 1, 1-trichloroethanal

2, 2, 2-trichloroethanal

Trichloroacetaldehyde

Solution

Question 3

4:2:2

4:1:2

4:1:3

3:3:3

Solution

Question 4

$$CH_4$$

$$C_2H_6$$

$$C_3H_8$$

$$C_4H_6$$

Solution

Question 5

Unsymmetrical dimethyl ethylene

Symmetrical dimethyl ethylene

1,2-dimethylethene

2-butene

Solution

Question 6

similar chemical properties, but gradually changing physical properties

similar physical properties, but gradually changing chemical properties

the same molecular formula, but different physical properties

similar physical properties and the same structural formula

Solution

Question 7

2-bromo-3-chloro-4-oxopentanoic acid

4-oxo-3-chloro-2-bromopentanoic acid

4-carboxybromo-3-chlorobutanone

None of these

Solution

Question 8

Propanetrinitrile - $$1,2,3$$

$$1,2,3$$-cyanopropane

Propane -$$1, 2, 3$$ tricarbonitrile

$$1, 2, 3$$-tricyanopropane

Solution

Question 9

$$b\ a\ c\ e\ d$$

$$e\ a\ b\ f\ d$$

$$b\ e\ c\ a\ d$$

$$e\ b\ a\ c\ d$$

Solution

Question 10

root word

primary suffix

secondary suffix

prefix

Solution

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