- 1(current)
Q. No.
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
54%
Level 3: 35%-60%
NEET - 2016
Hints
Which of the following reactions gives a meso-compound as the main product?
1. a, b
2. b, c
3. c, d
4. None of the above
| a. |  |
| b. |  |
| c. |  |
| d. |  |
1. a, b
2. b, c
3. c, d
4. None of the above
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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What specific reagents are used to convert dibromoethane into benzene?
1. (a) NaOH; (b) NaNH2; (c) Red hot iron tube at 873 K
2. (a) HBr; (b) NaNH2 ; (c) KMnO4
3. (a) alc.KOH; (b) NaNH2 ; (c) H2/Pd
4. None of the above
1. (a) NaOH; (b) NaNH2; (c) Red hot iron tube at 873 K
2. (a) HBr; (b) NaNH2 ; (c) KMnO4
3. (a) alc.KOH; (b) NaNH2 ; (c) H2/Pd
4. None of the above
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 4: Below 35%
Hints
Which of the following statements are incorrect in relation to the halogenation of alkane?
| a. | The reactivity of chlorine is less than that of bromine towards alkanes. |
| b. | For the photochemical chlorination of methane, Cl is formed in the slowest step. |
| c. | Free radicals are pyramidal intermediates, stabilized by hyperconjugation and resonance. |
| d. | Bromine has much higher regioselectivity than chlorine in abstracting 3° hydrogen. |
| 1. | a, c, d | 2. | a, b, c |
| 3. | c, d, b | 4. | None of the above |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
50%
Level 3: 35%-60%
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
NEET - 2024
Hints
Consider the given two statements:
| Statement I: | Addition of \(\text{Cl}_2\) in the presence of \(\text{CCl}_4 \) with alkene will give geminal dichloride. |
| Statement II: | The addition of two moles of HCl with alkyne will give vicinal dichloride. |
| 1. | Statement I is True and Statement II is False. |
| 2. | Statement I is False and Statement II is True. |
| 3. | Both Statement I and Statement II are True. |
| 4. | Both Statement I and Statement II are False |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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Consider the following statements:
The correct statements are:
1. (a) and (b) only
2. (b) and (c) only
3. (a) and (c) only
4. (a), (b) and (c)
| a: | n-Hexane on heating in the presence of anhydrous aluminium chloride and hydrogen chloride gas isomerises to branched chain alkanes. |
| b: | 2-Methylpropane is oxidised to 2-Methylpropan-2-ol by potassium permanganate. |
| c: | Methane reacts with steam at 1273 K in the presence of nickel catalyst to form carbon dioxide and dihydrogen. |
1. (a) and (b) only
2. (b) and (c) only
3. (a) and (c) only
4. (a), (b) and (c)
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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Which of the following statements is correct?
| 1. | Alkyne is more reactive towards electrophilic addition than alkene |
| 2. | Addition of HBr to an unsymmetrical alkene takes place according to anti-Markownikoff's rule |
| 3. | is more stable than |
| 4. | All of the above |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
53%
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.
- 1(current)
Q. No.
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