Aldehydes Ketones and Carboxylic Acids Test

Result

Aldehydes Ketones and Carboxylic Acids Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

IUPAC name of the compound is :

A
butenoic acid

B
butanoic acid

C
2-butynoic acid

D
none of these

Solution
Question 2
1 / -0

IUPAC naming of the compound is:

A
3-octanoic acid

B
octane-3-oic acid

C
2-ethylhexanoic acid

D
3-ethylhexanoic acid

Solution
Question 3
1 / -0

$$Ph-\underset{OH}{\underset{|}{C}H}-\overset{O}{\overset{||}C}-OH$$
Correct IUPAC naming of given acid is:

A
1-hydroxy-1-phenylethanoic acid

B
2-hydroxy-2-phenylethanoic acid

C
2-phenyl hydroxy ethanoic acid

D
none of these

Solution
Question 4
1 / -0

The correct IUPAC name of the given compound is:

A
2-phenyl-2-methylpropanoic acid

B
2-phenyl-2,2-dimethylethanoic acid

C
isopropyl benzanoic acid

D
none of these

Solution

From the above given Numbering IUPAC name is
$$2-$$phenyl $$2-$$methylpropanoic acid.
Question 5
1 / -0

Which of the following does not uses formaldehyde in its preparation?

A
Melamine polymer

B
Bakelite

C
PHBV

D
preservation of biological specimens

Solution

Formaldehyde is not used in the preparation of PHBV. PHBV is a thermoplastic polymer. The monomers, 3-hydroxybutanoic acid and 3-hydroxypentanoic acid, are joined by ester bonds; the back bone of the polymer is made up of carbon and oxygen atoms.
Question 6
1 / -0

Which of the following doesn't use acetaldehyde as a starting material in its preparation?

A
Ethyl acetate

B
Ethanoic acid

C
Methanoic acid

D
Drugs

Solution

Methanoic acid needs only single carbon compound not acetaldehyde.
$$HCOOH$$-formic acid/Methanoic acid.
Question 7
1 / -0

Formalin is used in the preparation of:

A
bakelite

B
nylon

C
styrene

D
teflon

Solution

Bakelite is the polymer of formaldehyde and phenol.
Formalin is nothing but a 40% solution of formaldehyde.
Thus, Formalin is used in the preparation of Bakelite.
Question 8
1 / -0

Formalin is:

A
$$60$$% solution of formaldehyde

B
$$40$$% solution of formaldehyde

C
$$30$$% solution of formaldehyde

D
$$50$$% solution of formaldehyde
Solution
Explanation:
- Formalin is the aqueous solution of formaldehyde. It is a $$40$$% (By Volume) solution of formaldehyde in water.
- It means formalin has $$40$$% of formaldehyde.
- Formalin is most commonly used as an industrial disinfectant and also used to preserve food materials and also used as antiseptic.
Correct Option: $$B$$
Question 9
1 / -0

The percentage of formaldehyde in formalin is:

A
$$40$$%

B
$$30$$%

C
$$20$$%

D
$$10$$%

Solution

The percentage of formaldehyde in formalin is $$40$$%
$$10$$ml formalin contains $$40$$ ml formaldehyde and $$60$$ ml of water.
Question 10
1 / -0

Which of the following aldehyde is very much used in perfumery and in dye industries?

A
Formaldehyde

B
Acetaldehyde

C
Benzaldehyde

D
Butyraldehyde

Solution

Benzaldehyde is much used perfumery industries because it has bitter almond odour and also it is used for making aniline dye.