The correct order of decreasing stability of the following cations is -
1. II>I>III
2. I>II>III
3. II<I<III
4. I<II<III
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology The correct IUPAC name for is _____.
1. 2-Ethyl-3-methylpentane
2. 3,4-Dimethylhexane
3. 2-sec-Butylbutane
4. 2,3-Dimethylbutane
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following carbon marked with asterisk is expected to have greatest positive charge?
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most stable carboxylate ion among the following is-
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyElectrophilic addition reactions proceed in two steps. The first step involves the addition of an electrophile. The major intermediate formed in the first step is -
?
1. carbanion
2. carbocation
3. carbocation
4. carbanion
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCovalent bonds can undergo fission in two different ways. The correct representation involving heterolytic fission of is
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe addition of HCl to an alkene proceeds in two steps. The first step is the attack of H+ ion on the double bond portion. The same can be shown as -
1.
2.
3.
4. All of these are possible
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the type of mixture of compounds in Column I with the technique of separation/purification given in column II.
Column I | Column II |
A. Two solids which have different solubilities in a solvent and which do not undergo a reaction when dissolved in it | 1. Steam distillation |
B. Liquid that decomposes at its boiling point | 2. Fractional distillation |
C. Steam volatile liquid | 3. Crystallisation |
D. Two liquids that have boiling points close to each other | 4. Distillation under reduced pressure |
Codes
A | B | C | D | |
1. | 3 | 4 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the terms mentioned in Column I with the terms in Column II.
Column I |
Column II |
A. Carbocation |
1. Species that can receive a pair of electrons |
B. Nucleophile |
2. Conjunction of electrons of bond with the empty p-orbital present in adjacent positively charged carbon |
C. Hyperconjugation |
3. hybridised carbon with empty p-orbital |
D. Electrophile |
4. Species that can donate a pair of electrons |
Codes
A B C D
1. 3 4 2 1
2. 1 2 3 4
3. 1 4 3 2
4. 4 1 3 2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch Column I with Column II.
Column I | Column II |
A. Dumas method | 1. AgNO3 |
B. Kjeldahl’s method | 2. Silica gel |
C. Carius method | 3. Nitrogen gel |
D. Chromatography | 4. Ammonium sulphate |
Codes
A | B | C | D | |
1. | 3 | 4 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology