Chemistry Quiz

0%

Question 1: The carbon atom of the carbonyl group is:

A) Sp

B) sp2

C) Sp3)

D) Sp3d

Explanation: b) sp2

Question 2: Dry heating of calcium acetate will give:

A) Acetic acid

B) Acetone

C) Ethanol

D) Acetaldehyde

Explanation: Acetone

Question 3: Tollens' reagent is:

A) alkaline mercuric chloride

B) alkaline potassium permanganate

C) ammonium citrate

D) ammonium silver nitrate

Explanation: ammonium silver nitrate

Question 4: Which statement is incorrect in the case of acetaldehyde and acetone?

A) Both react with HCN

B) Both give iodoform test

C) Both can be reduced into alcohols

D) Both react with NaOH to form polymer

Explanation: Both react with NaOH to form polymer

Question 5: When formaldehyde is treated with ammonia, the compound formed is

A) Methylamine

B) hexamethylene tetramine

C) formaldehyde ammonia

D) formalin

Explanation: Methylamine

Question 6: A plastic bakelite is a compound of phenol with:

A) acetal

B) Ethnal

C) Methnal

D) Acetone

Explanation: Methnal

Question 7: Formaldehyde can be distinguished from acetaldehyde by the use of:

A) Schiff's reagent

B) Tollens reagent

C) Fehlings solution

D) Iodoform test

Explanation: Iodoform test

Question 8: Which of the following would undergo aldol condensation

A) Propionaldehyde

B) Pivaldehyde

C) Chloral

D) Formaaldehyde

Explanation: Propionaldehyde

Question 9: A natural compound (X), C4H802, reduces Fehling's solution, liberates hydrogen when Treated with sodium metal and gives a positive iodoform test. The structure of (X) is

A) CH3CHOHCH2CHO/div>

B) HOCH2CH2CHO

C) CH3COCH2CH2OH

D) CH3COCH2CHO

Explanation: CH3COCH2CH2OH

Question 10: A carbonyl compound with molecular weight 86, does not reduce Fehling's solution but forms crystalline bisulphite derivatives and gives iodoform test. The possible compound can be:

A) pentan-2-one and pentan-3-one

B) pentan-3-one and 3-methyl butan-2-one

C) pentanone and pentanal

D) pentan-2-one and methyl butan-2-one

Explanation: pentan-2-one and methyl butan-2-one

Question 11: A compound does not react with 2,4-dinitrophenyl hydrazine, compound is

A) Acetaldehyde

B) Acetone

C) Methanol

D) Ethyl methyl ketone

Explanation: Methanol

Question 12: A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is

A) diethyl ketone

B) formaldehyde

C) acetone

D) acetaldehyde

Explanation: acetaldehyde

Question 13: Ketones can be prepared by

A) heating calcium propionate with calcium formate

B) action of dialkyl cadmium on acid chloride

C) hydrolysis of n-propylidene chloride with alkali

D) dry distillation of fused calcium acetate

Explanation: dry distillation of fused calcium acetate

Question 14: Acetone molecules condensation with conc. Sulphuric acid can give

A) mesityloxide

B) mesitylene

C) croton aldehyde

D) phorone

Explanation: mesitylene

Question 15: A mixture of benzaldehyde and formaldehyde on heating. with aqueous NaOH gives

A) benzyl alcohol and sodium fonnate

B) benzyl alcohol and methyl aloohol

C) sodium benzoate and sodium formate

D) sodium benzoate and methyl alcohol

Explanation: sodium benzoate and sodium formate

Question 16: The most reactive compound towards formation of cyanohydrin on treatment with KCN followed by acidification is

A) p-hydroxy benzaldehyde

B) benzaldehyde

C) p-nitrobenzaldehyde

D) phenyl acetaldehyde

Explanation: p-nitrobenzaldehyde

Question 17: Ozonolysis of C7H14 gave 2-methyl pentan-3-0ne. The alkene is

A) 2-ethyl-3-methyl but-I-ene

B) 2-methyl-3-ethyl but-3-ene

C) 2,5-dimethyl-3,4-diethyl hex-3-ene

D) 2-methyl-3-ethyl but-I-ene

Explanation: 2-ethyl-3-methyl but-I-ene

Question 18: Out of butane, butan-l-ol, butanal and butanone, the decreasing order of their boiling point is

A) butane> butanol> butanal > butanone

B) butanol> butane> butanal > butanone

C) butanone > butanal > butanol> butane

D) butanol> butanal > butanone > butane

Explanation: butanol> butanal > butanone > butane

Question 19: Formic acid is not a representative member of the carboxylic acids because:

A) it is a gas

B) it is the first member of the series

C) it does not contain an alkyl group

D) it contains an aldehydic group while the other acids do. not have the aldehydic group

Explanation: d) it contains an aldehydic group while the other acids do. not have the aldehydic group

Question 20: Which of the following will not undergo HVZ reaction?

A) 2,2-Dimethyl propanoic acid

B) Propanoic acid

C) Acetic acid

D) 2-Methyl propanoic acid

Explanation: 2,2-Dimethyl propanoic acid

Report Card

Total Questions Attempted: 0

Correct Answers: 0

Wrong Answers: 0

--