Q. No.
The increasing order of stability of the following free radicals is:
| 1. | \(\small{({CH}_3})_2 \dot{{C}}H<{({CH}_3})_3 \dot{{C}}<{({C}_6 {H}_5})_2 \dot{{C}}H <{({C}_6 {H}_5})_3 \dot{{C}}\) |
| 2. | \(\small({{C}_{6} {H}_{5})}_{3} \dot{{C}}<({{C}_{6} {H}_{5})}_{2} \dot{{C}} {H}<({{CH}_{3})}_{3} \dot{{C}}<({{CH}_{3})}_{2} \dot{{C}}H\) |
| 3. | \(\small({{C}_{6} {H}_{5})}_{2} \dot{{C}} {H}<({{C}_{6} {H}_{5})}_{3} \dot{{C}}<({{CH}_{3})}_{3} \dot{{C}} <({{CH}_{3})}_{2} \dot{{C}}H \) |
| 4. | \(\small({{CH}_{3})}_{2} \dot{{C}} {H}<({{CH}_{3})}_{3} \dot{{C}}<({{C}_{6} {H}_{5})}_{3} \dot{{C}} <({{C}_{6} {H}_{5})}_{2} \dot{{CH}}\) |
The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is:
1. Fe4[Fe(CN)6]3
2. Na3[Fe(CN)6]
3. Fe(CN)3
4. Na4[Fe(CN)5NOS]
The correct structural formula of 5-nitro-3-methoxy-3-methylhexanoyl chloride among the following is:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
The sodium extract of an organic compound on acidification with acetic acid and the addition of lead acetate solution gives a black precipitate.
The organic compound contains:
| 1. | Nitrogen | 2. | Halogen |
| 3. | Sulphur | 4. | Phosphorus |
What is the IUPAC name of the given compound?
1. 1, 1-Diethyl-2-dimethylpentane
2. 4, 4-Dimethyl-5, 5-diethylpentane
3. 5, 5-Diethyl-4, 4-dimethylpentane
4. 3-Ethyl-4, 4-dimethylheptane
The IUPAC name of neopentane is :
1. 2-Methylbutane
2. 2, 2-Dimethylpropane
3. 2-Methylpropane
4. 2, 2-Dimethylbutane
The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :
1. Steam distillation
2. Distillation under reduced pressure
3. Fractional distillation
4. Differential extraction
In an estimation of bromine by the Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of bromine in the compound is:
[Atomic mass, Ag=108, Br = 80 g ]
1. 50 %
2. 55.5%
3. 60 %
4. 70 %
The correct order of stability of following carbocation is-
| 1. | b > a > c | 2. | a > c > b |
| 3. | a > b > c | 4. | c > b > a |
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