Q. No.The total number of resonating structures (excluded the given structure) formed by the given molecule are :
1.
2
2.
3
3.
4
4.
5
The correct statement regarding electrophile is :
| 1. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile |
| 2. | Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile |
| 3. | Electrophiles can be either neutral or positively charged species and can form a bond accepting a pair of electrons from a nucleophile |
| 4. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile |
The correct order with respect to –I effect of the substituents is:
(R = alkyl)
1. –NH2 > –OR < –F
2. –NR2 < –OR < –F
3. –NH2 > –OR > –F
4. –NR2 > –OR > –F
| 1. | Four (4) | 2. | Eight (8) |
| 3. | Twelve (12) | 4. | Sixteen (16) |
In Kjeldahl’s method for estimation of nitrogen present in the soil sample, ammonia evolved from 0.75g of sample neutralized 10ml of 1M H2SO4. The percentage of nitrogen in the soil is:
| 1. | 37.33 | 2. | 45.85 |
| 3. | 25.75 | 4. | 43.13 |
The best method used for the separation of naphthalene and benzoic acid from their mixture is -
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation
The IUPAC name of the above-mentioned compound is:
1. Pent-1-en-3-yne
2. Pent-1-ene-4-yne
3. Pent-4-yn-1-ene
4. Pent-1-en-4-yne
The IUPAC name of the above mentioned compound is -
1. 3, 4-Dimethylpentanoyl chloride
2. 1-Chloro-1-oxo-2,3-dimethylpentane
3. 2-Ethyl-3-methylbutanoylchloride
4. 2, 3-Dimethylpentanoyl chloride
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