Q. No.There is only one –NH2 group involved in semicarbazone formation out of two –NH2 group. It is due to:
1. Resonance of one type of –NH2 group
2. Inductive effect of one type of –NH2 group
3. Hyperconjugation of one type of –NH2 group
4. Reverse hyperconjugation of one type of -NH2 group
What type of reaction is demonstrated by the process involving a carboxylic acid, an alcohol, and an acid that results in the formation of esters?
1. Reversible slow process
2. Irreversible fast process
3. Cyclic process
4. Adiabatic process
The below reaction is an example of
\(CH_{3}CH_{2}OH \ + \ CH_{3}COCl \xrightarrow[]{\textbf{Pyridine}} \)
\( CH_{3}COOC_{2}H_{5} \ + \ HCl\)
1. Acetylation
2. Benzoylation
3. Cross aldol condensation
4. Cross Cannizzaro reaction
| (a) | Mg/ Dry ether |
| (b) | Br2 / FeBr3 |
| (c) | CO2 ; H3O+ |
| (d) | HNO3 + H2SO4 |
| 1. | (a) | (b) | (c) | (d) |
| 2. | (b) | (a) | (c) | (d) |
| 3. | (c) | (b) | (a) | (d) |
| 4. | (d) | (b) | (a) | (c) |
The correct sequence of reagents used for the preparation of Phenylacetic acid from benzene are :
| 1. | a= NBS, hv, and heat; b= CH3Cl/Anhyd.AlCl3; C= KMnO4+KOH; d=H3O+ |
| 2. | a= CH3Cl/Anhyd.AlCl3; b= KMnO4+KOH; C= NBS, hv, and heat; d=H3O+ |
| 3. | a= CH3Cl/Anhyd.AlCl3; b= NBS, hv, and heat; C= H3O+; d=KMnO4+KOH |
| 4. | a= CH3Cl/Anhyd.AlCl3; b= NBS, hv, and heat; C= alc.KCN; d=H3O+ |
The correct sequence of reagents used to yield p-Nitrobenzaldehyde from benzene is:
| (a) | CH3Cl /Anhyd. AlCl3 |
| (b) | HNO3 /H2SO4 |
| (c) | CS2 / CrO2Cl2 |
| (d) | H3O+ |
| 1. | (a) | (b) | (c) | (d) |
| 2. | (c) | (b) | (a) | (d) |
| 3. | (b) | (a) | (c) | (d) |
| 4. | (a) | (b) | (d) | (c) |
Chemical test(s) to distinguish between the Propanal and Propanone is :
| 1. | Tollen’s test
|
2. | Fehling’s test
|
| 3. | Iodoform test
|
4. | All of these |
Chemical test(s) used to distinguish between Acetophenone and Benzophenone is :
1. Tollen’s test
2. Fehling’s test
3. Iodoform test
4. All of the above
A chemical test to distinguish between Phenol and Benzoic acid is :
1. Tollen’s test
2. Fehling’s test
3. Iodoform test
4. Ferric chloride test
1. Tollens' test
2. Fehling’s test
3. Iodoform test
4. Sodium bicarbonate test.
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