Which of the following is suitable to synthesize chlorobenzene?
| 1. |  |
| 2. | Benzene, Cl2, anhydrous FeCl3 |
| 3. | Phenol, NaNO2, HCl, CuCl |
| 4. |  |
Subtopic: Haloarenes: Directive Influence of Halogen |
68%
Level 2: 60%+
NEET - 2022
Hints
Identify the incorrect statement from the following:
| 1. | Lithium is the strongest reducing agent among the alkali metals. |
| 2. | Alkali metals react with water to form their hydroxides. |
| 3. | The oxidation number of K in KO2 is +4. |
| 4. | Ionisation enthalpy of alkali metals decreases from top to bottom in the group. |
Subtopic: Introduction to Redox and Oxidation Number |
68%
Level 2: 60%+
NEET - 2022
Hints
Subtopic: Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
75%
Level 2: 60%+
NEET - 2022
Hints
At \(298 {~K},\) the standard electrode potentials of \(\mathrm{{Cu}^{2+} /{Cu},}\) \(\mathrm{{Zn}^{2+} / {Zn},~~ {Fe}^{2+} / {Fe}}\) and \(\mathrm{{Ag}^{+} / {Ag}} \) are \(\mathrm{0.34 {~V}, -0.76 {~V},}\) \(\mathrm{-0.44 {~V}}\) and \(\mathrm{0.80 {~V},}\) respectively.
On the basis of standard electrode potentials, predict which of the following reaction can not occur?
On the basis of standard electrode potentials, predict which of the following reaction can not occur?
| 1. | \(\mathrm{2 {CuSO}_{4}({aq})+2 {Ag}({s}) → 2 {Cu}({s})+{Ag}_{2} {SO}_{4}({aq})} \) |
| 2. | \(\mathrm{{CuSO}_{4}({aq})+{Zn}({s})} \) \(\mathrm{→ {ZnSO}_{4}({aq})+{Cu}({s})} \) |
| 3. | \(\mathrm{{CuSO}_{4}({aq})+{Fe}({s})} \) \(\mathrm{→ {FeSO}_{4}({aq})+{Cu}({s})} \) |
| 4. | \(\mathrm{{FeSO}_{4}({aq})+{Zn}({s})} \) \(→ \mathrm{{ZnSO}_{4}({aq})+{Fe}({s})} \) |
Subtopic: Emf & Electrode Potential |
69%
Level 2: 60%+
NEET - 2022
Hints
Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| I: | The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group. |
| II: | o-Nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring. |
| 1. | I is incorrect but II is correct. |
| 2. | Both I and II are correct. |
| 3. | Both I and II are incorrect. |
| 4. | I is correct but II is incorrect. |
Subtopic: Phenols: Preparation & Properties |
84%
Level 1: 80%+
NEET - 2022
Hints
Which of the following statements is not correct about diborane?
| 1. | Both the boron atoms are sp2 hybridised. |
| 2. | There are two 3-centre-2-electron bonds. |
| 3. | The four terminal B-H bonds are 2-centre-2-electron bonds. |
| 4. | The four terminal hydrogen atoms and the two boron atoms lie in one plane. |
Subtopic: Compounds of Boron- Preparations, Properties & Uses |
62%
Level 2: 60%+
NEET - 2022
Hints
Elevation in the boiling point for 1 molal solution of glucose is 2 K. The depression in the freezing point for 2 molal solution of glucose in the same solvent is 2 K. The relation between Kb and Kf is:
1. \(K_b= 1.5 ~K_f\)
2. \(K_b= K_f\)
3. \(K_b= 0.5 ~K_f\)
4. \(K_b= 2 ~K_f\)
1. \(K_b= 1.5 ~K_f\)
2. \(K_b= K_f\)
3. \(K_b= 0.5 ~K_f\)
4. \(K_b= 2 ~K_f\)
Subtopic: Elevation of Boiling Point | Depression of Freezing Point |
70%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Statement I | The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole-dipole interactions. |
| Statement II | The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding. |
| 1. | Statement I is incorrect but Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct but Statement II is incorrect. |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
65%
Level 2: 60%+
NEET - 2022
Hints
Select the correct option based on the statements below:
| Assertion (A): | ICl is more reactive than I₂. |
| Reason (R): | I-Cl bond is weaker than I-I bond. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Group 17 - Preparation, Properties & Uses |
73%
Level 2: 60%+
NEET - 2022
Hints
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I (Products formed) |
List - II (Reaction of carbonyl compound with) |
||
| (A) | Cyanohydrin | (I) | NH₂OH |
| (B) | Acetal | (II) | RNH₂ |
| (C) | Schiff's base | (III) | Alcohol |
| (D) | Oxime | (IV) | HCN |
| (A) | (B) | (C) | (D) | |
| 1. | (IV) | (III) | (II) | (I) |
| 2. | (III) | (IV) | (II) | (I) |
| 3. | (II) | (III) | (IV) | (I) |
| 4. | (I) | (III) | (II) | (IV) |
Subtopic: Name Reaction |
90%
Level 1: 80%+
NEET - 2022
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