Chemistry Objective Question Bihar Board
1. Which of the following will not yield acetic acid on strong oxidation ?
a. Butanone
b. Propanone
c. Ethyl ethanote
d. Ethanol
Ans – ( C )
2. Which among the following does not give formaldehyde on distillation or heating ?
a. Formalin
b. Trioxane
c. Paraldehyde
d. Paraformaldehyde
Ans – ( D )
3. The compound formed by the reaction of toluene and chromylchloride ?
a. Benzoic acid
b. Benzaldehyde
c. Benzal Chloride
d. Chlorotoluence
Ans – ( B )
4. From which reaction, there is no. increase the number of carbon in the compound ?
a. Grigand reaction
b. Cannizzaro’s reaction
c. Aldol condenssation
d. All of the above
Ans – ( B )
5. Primary alcohol is not formed by the reduction of which of the following compound ?
a. Propanal
b. Propanoic acid
c. Methyal propanoate
d. Propan – 2 – one
Ans – ( D )
6. The trade name of which of the following substance is formalin ?
a. Formic acid
b. 40% aqueous soln. of methanal
c. Chloroform
d. Paraformaldehyde
Ans – ( B )
7. Formic acid and acetic acid can be distinguished by the reaction with –
a. Sodium
b. 2, 4-dinitrophenyl hydrazine
c. Mercuric Chloride
d. Sodiumethoxide
Ans – ( C )
8. Paraldehyde is a trimer of
a. Methanol
b. Ethanol
c. Butanol
d. None
Ans – ( B )
9. Which type of isomerism is shown by pentanone ?
a. Chain isomerism
b. Functional isomerism
c. Position isomerism
d. All of these
Ans – ( D )
10. Aldehyde and Ketones do not react With
a. Sodium bisulphite
b. Dihydrogen sodium phosphate
c. Semicarbazide
d. Phenyl hydrazine
Ans – ( B )
Chemistry Objective Question Bihar Board
11. Which among the following does not give iodoform test ?
a. Ethanal
b. Ethanol
c. Pentan-2-one
d. Pentan-3-one
Ans – ( D )
12. Which among the following is most basic ?
a. Benzylamine
b. Aniline
c. Acetanilide
d. p-nitroaniline
Ans – ( A )
13. Which is obtained by the hydrolysis of HCN ?
a. Acetic acid
b. Alcohol
c. Formaldehyde
d. Formic acid
Ans – ( D )
14. Nitrous acid reacts with aliphatic primary amine and then gives –
a. A diazonium salt
b. An alcohol
c. A nitrite
d. A Rogan
Ans – ( B )
15. The product formed by the reaction of benzenediazonium chloride with water is
a. Benzene
b. Phenol
c. Anisol
d. Chlorobenzene
Ans – ( B )
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