Which of the following pairs contain species that are not isostructural?
1.
\(\mathrm{SiCl}_4, \mathrm{PCl}_4^{+}\)
2.
Diamond, silicon carbide
3.
\(\mathrm{NH}_3, \mathrm{PH}_3\)
4.
\(\mathrm{XeF}_4, \mathrm{XeO}_4\)
The reaction of phenol with chloroform in the presence of dilute sodium hydroxide finally introduces a functional group X. The X is:
| 1. | -CH2Cl | 2. | -COOH |
| 3. | -CHCl2 | 4. | -CHO |
Alkyl halides prepared by among the following reaction(s) is/are:
| I. | \(CH_3CH_2OH+HCl\xrightarrow{\bf{anh. ZnCl_2}}\) |
| II. | \(CH_3CH_2OH+HCl→\) |
| III. | \((CH_3)_3COH+HCl→ \) |
| IV. | \((CH_3)_2CHOH+HCl\xrightarrow{\bf{anh.ZnCl_2}}\) |
| 1. | I, III, and IV | 2. | I and II |
| 3. | Only IV | 4. | III and IV |
The correct statement about the SN1 reaction is:
| 1. | 100 % racemisation. |
| 2. | Inversion more than retention leads to partial racemisation. |
| 3. | 100 % retention. |
| 4. | 100 % Inversion. |
?
HCl with an alkene X reacts in accordance with Markovnikov’s rule to give 1-Chloro-1-methylcyclohexane. The structure of alkene (X) is:
| 1. |  |
2. |  |
| 3. | (1) and (2) | 4. |  |
The number of possible isomers for the complex \([Co (en)_ 2 Cl_ 2] 𝐶 𝑙 \) will be:
(en=ethylenediamine)
| 1. | Two (2) | 2. | One (1) |
| 3. | Three (3) | 4. | Four (4) |
A gas such as carbon monoxide would be most likely to obey the ideal gas law at?
1. High temperature and low pressure
2. Low temperature and high pressure
3. High temperature and high pressure
4. Low temperature and low pressure