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Q. No.Given the following compounds:
(a) Heptane
(b) Butane
(c) 2-Methylbutane
(d) 2-Methylpropane
(e) Hexane
For the compounds given above, the correct option capturing decreasing order of boiling points is:
1.
(a) > (c) > (e) > (d) > (b)
2.
(c) > (d) > (a) > (e) > (b)
3.
(a) > (e) > (b) > (c) > (d)
4.
(a) > (e) > (c) > (b) > (d)
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
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The compound obtained by addition of water to an alkyne having more than two carbons, in the presence of \(\mathrm{HgSO_4 }\) and dilute \(\mathrm{H_2SO_4}\) at 333K, is:
| 1. | A vicinal diol | 2. | An aldehyde |
| 3. | An alcohol | 4. | A ketone |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
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Match the bond line structures of hydrocarbons given in List I with the corresponding boiling points given in List II.
| List-I (Compound) | List II (Boiling point in K) | ||
| (a) |  |
(i) | 300.9 |
| (b) |  |
(ii) | 282.5 |
| (c) |  |
(iii) | 309.1 |
| (d) |  |
(iv) | 341.9 |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iv) | (iii) | (ii) |
| 2. | (iii) | (i) | (iv) | (ii) |
| 3. | (iii) | (iv) | (i) | (ii) |
| 4. | (iv) | (i) | (ii) | (iii) |
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
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Compound X on reaction with \(O_3\) followed by \(\mathrm{Zn/ H_2O}\) gives formaldehyde and 2-methyl propanal as products. The compound X is :
1. Pent-2-ene
2. 3-Methylbut-1-ene
3. 2-Methylbut-1-ene
4. 2-Methylbut-2-ene
1. Pent-2-ene
2. 3-Methylbut-1-ene
3. 2-Methylbut-1-ene
4. 2-Methylbut-2-ene
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
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Subtopic: Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
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Consider the following compounds/species:
The number of compounds/species which obey Huckel's rule is:
| i. |  |
ii. |  |
| iii. |  |
iv. |  |
| v |  |
vi |  |
| vii |  |
| 1. | 5 | 2. | 4 |
| 3. | 6 | 4. | 2 |
Subtopic: Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
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Which amongst the following compounds will show geometrical isomerism?
1. Pent-1-ene
2. 2,3-Dimethylbut-2-ene
3. 2-Methylprop-1-ene
4. 3,4-Dimethylhex-3-ene
1. Pent-1-ene
2. 2,3-Dimethylbut-2-ene
3. 2-Methylprop-1-ene
4. 3,4-Dimethylhex-3-ene
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
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Subtopic: Aliphatic Hydrocarbon - Methods of Preparation |
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Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
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Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the option given below:
1. Both Statement I and Statement II are incorrect.
2. Statement I is correct but Statement II is incorrect.
3. Statement I is incorrect but Statement II is correct.
4. Both Statement I and Statement II are correct.
| Statement I : | The boiling point of three isomeric pentanes follows the order \(\text { n-pentane }>\text { isopentane }>\text { neopentane }\) |
| Statement II : | When branching increases, the molecule attains the shape of sphere. This results in smaller surface area for contact, due to which the intermolecular forces between the spherical molecules are weak, thereby lowering the boiling point. |
In the light of the above statements, choose the most appropriate answer from the option given below:
1. Both Statement I and Statement II are incorrect.
2. Statement I is correct but Statement II is incorrect.
3. Statement I is incorrect but Statement II is correct.
4. Both Statement I and Statement II are correct.
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
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NEET - 2024
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