Aldehydes and Ketones are organic compounds containing the carbonyl group (>C=O), i.e. having a carbon-oxygen double bond. The difference between an aldehyde and ketone is that, in aldehydes, the carbonyl carbon is attached to one carbon and hydrogen (except formaldehyde), whereas, in ketones, the carbonyl carbon is attached to two carbons. They are widely distributed among living organisms and take part in various biological processes.
1. When benzene is oxidised by V2O5 in presence of air, it produces
(a) benzoic acid
(b) maleic anhydride
(c) benzoic anhydride
(d) benzaldehyde
2. Clemmensen reduction takes place in the presence of
(a) Zn-Hg with HCl
(b) Glycol with KOH
(c) H2 and Pt as catalyst
(d) LiAlH4
3. Which of the following tests can distinguish between acetaldehyde and phenylacetaldehyde?
(a) Iodoform test
(b) Benedictβs test
(c) Fehlingβs solution test
(d) Tollenβs reagent test
4. Find the correct reactivity order for the following with phenyl magnesium bromide (PhMgBr).
I – Acetaldehyde, II – Acetone, III – Benzophenone
(a) II > I > III
(b) III > II > I
(c) I > II > III
(d) I > III > II
5. Which of the following compounds can a strong base remove an π-hydrogen from?
(a) Alkane
(b) Ketone
(c) Amine
(d) Alkene
6. Which of the following will give a corresponding aldehyde or ketone on oxidation?
(a) ortho-Nitrophenol
(b) 2-Hydroxypropane
(c) 2-Methyl-2-hydroxypropane
(d) Phenol
7. Which of the following will most readily undergo a nucleophilic addition reaction?
(a) CH3CH2CH2COCH3
(b) CH3CHO
(c) CH3CH2CHO
(d) CH3COCH3
8. On reduction of a carbonyl compound by Zn-Hg and Conc. HCl, it is converted to an alkane. This reaction is known as,
(a) Dow reduction
(b) Cope reduction
(c) Clemmensen reduction
(d) Wolf-Kishner reduction
9. Which among the following will most readily undergo the nucleophilic attack at the carbonyl group?
(a) CH3CONH2
(b) CH3COOCH3
(c) CH3COCl
(d) CH3COOCOCH3
10. Which among the following is formed when benzoyl chloride is hydrogenated over a catalyst, palladium on barium sulphate?
(a) C6H5OH
(b) C6H5CHO
(c) C6H5Cl
(d) C6H5COCH3
Answer
|
1. (b) |
2. (a) |
3. (a) |
4. (c) |
5. (b) |
|
6. (b) |
7. (b) |
8. (c) |
9. (c) |
10. (b) |
Recommended Videos:
|
Also Check: |
Comments