Organic Chemistry Some Basic Principles and Techniques Test

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Organic Chemistry Some Basic Principles and Techniques Test - 13

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Weekly Quiz Competition

Question 1
1 / -0

The fruity smell is of a/an:

A
aldehyde

B
ketone

C
alcohol

D
ester

Solution

Esters have a fruity smell due to their volatile nature caused by their chemical composition and conformations.
Question 2
1 / -0

The functional group present in organic acid is:

A
$$-OH$$

B
$$-CHO$$

C
$$-COOH$$

D
$$> C = O$$

Solution

The functional group present every organic acid is $$-COOH$$ as it dissociate in water as $$-COO^-$$ and $$H^+$$.
Question 3
1 / -0

IUPAC name of $${CH}_{3}O{C}_{2}{H}_{5}$$ is:

A
ethoxy methane

B
methoxy ethane

C
both (A) and (B)

D
none of these

Solution

According to IUPAC nomenclature system, ethers are known as alkoxy alkane. The ether oxygen is taken with a smaller alkyl group and creates the alkoxy group while larger alkyl group is considered as a alkyl group. So the name will be methoxy ethane. Hence option B is correct.
Question 4
1 / -0

An unknown alkene (A) react with 3 mole of $$H_2$$ gas in presence of platinum catalyst to from 1-isopropyl-4-methyl cyclohexane. When unknown alkene (A) is ozonized and reduced, following product are oabtained
$$H-{\overset{O}{\overset{||}C}}-H, \, H-{\overset{O}{\overset{||}C}}-CH_2-{\overset{O}{\overset{||}C}}-{\overset{O}{\overset{||}C}}-CH_3, \, CH_3-{\overset{O}{\overset{||}C}}-CH_2-{\overset{O}{\overset{||}C}}-H$$
The alkene (A) is :

A

B

C

D

Solution

The hydrogenated product is based on ozonised molecules, we can identify positions of double bonds by joining them hence the reactant A is form
Refer to image
Question 5
1 / -0

Indicate the wrongly named compound.

A

B

C

D

Solution

Answer:-
Since the numbering of parent chain starts from the side where the main functional group is attached, the correct name of the compound is : Hex-3-ene-2-one.
Question 6
1 / -0

Which functional group is present in a molecule of $${CH}_{3}O{CH}_{2}{CH}_{3}$$?

A
Ether

B
Carboxyl

C
Ketone

D
Aldehyde

E
Ester

Solution

The functional group present in $$\displaystyle {CH}_{3}-O-{CH}_{2}{CH}_{3}$$ is an ether group $$\displaystyle -O-$$.
Note: In general, ethers can be represented as $$\displaystyle R-O-R'$$
Question 7
1 / -0

'I.U.P.A.C.', stands for?

A
Iodine Under Packing

B
International Union of Pure and Applied Chemistry

C
International Units of Protein and Carbohydrates

D
International Understanding on Physical Aspects of Chemistry

Solution

Solution:- (B) International Union of Pure and applied Chemistry.
Explanation:-
A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry. The full form of IUPAC is International Union for Pure and Applied Chemistry.
Question 8
1 / -0

The colour of bromine solution is :

A
Red

B
Purple

C
Orange

D
Green

E
Blue

Solution

Bromine is a chemical element with symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas.
Question 9
1 / -0

IUPAC name of $$CH_3-O- \underset { CH_ 3 }{ \underset{| }{CH}}-CH_3$$ is _____.

A
3-Methoxy propane

B
2-Methyl methoxy ethane

C
1-Methoxy-1-methyl ethane

D
Methoxy isopropane

Solution

The IUPAC name of the given compound is methoxy isopropane.
Hence, option D is correct.
Question 10
1 / -0

IUPAC name of $$CH_{3}-O-C_{2}H_{5}$$ is-

A
Ethoxymethane

B
1-methoxyethane

C
Methylethyl ether

D
Ethylmethyl ether

Solution

The IUPAC name of $$CH_3-O-CH_2-CH_3$$
An ether's IUPAC name should always follow this rule,
It is always name as small Alkoxy big alkane
Small-substituent here is $$CH_3$$
Big-chain here is $$C_2H_5$$
therefore it is named as $$1-$$methoxyethane.