Which of the following options correctly represents the sequence of neutral, acidic, basic, and amphoteric oxides, respectively?
| 1. | NO, ZnO, CO2, CaO | 2. | ZnO, NO, CaO, CO2 |
| 3. | NO, CO2, ZnO, CaO | 4. | NO, CO2, CaO, ZnO |
Subtopic: Nature of Compound |
78%
Level 2: 60%+
NEET - 2023
Hints
Which of the following is the correct sequence of reagents for converting 4-nitrotoluene to 2-bromotoluene?
| 1. | NaNO2/HCl; Sn/HCl; Br2; H2O/H3PO2 |
| 2. | Sn/HCl; NaNO2/HCl; Br2; H2O/H3PO2 |
| 3. | Br2; Sn/HCl; NaNO2/HCl; H2O/H3PO2 |
| 4. | Sn/HCl; Br2; NaNO2/HCl; H2O/H3PO2 |
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
Level 3: 35%-60%
NEET - 2023
Hints
Subtopic: Name Reaction |
77%
Level 2: 60%+
NEET - 2023
Hints
Given below are two statements:
1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false
| Statement I: | In an organic compound, when inductive and electromeric effects operate in opposite directions, the inductive effect predominates. |
| Statement II: | Hyperconjugation is observed in o-xylene. |
1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false
Subtopic: Electron Displacement Effects |
Level 3: 35%-60%
NEET - 2023
Hints
The molar conductance of a solution, given its conductivity (0.248 S m–1) and concentration (0.2 mol m–3) is:
| 1. | 0.124 S cm2 mol–1 | 2. | 1.24 S m2 mol–1 |
| 3. | 124 S cm2 mol–1 | 4. | 124 S m2 mol–1 |
Subtopic: Conductance & Conductivity |
Level 3: 35%-60%
NEET - 2023
Hints
Given below are two statements:
| Assertion (A): | Ionisation enthalpies of early actinoids are lower than early lanthanoids. |
| Reason (R): | Electrons entering 5f orbitals in actinoids experience greater shielding from the nuclear charge. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: f-Block Elements- Properties & Uses |
Level 3: 35%-60%
NEET - 2023
Hints
Consider the following reaction:
\(\mathrm{2H_2(g) + O_2(g) \rightarrow 2H_2O(g); ~\Delta_rH^\circ = -483.64~ kJ }\)
What is the enthalpy change (in KJ) for the decomposition of one mole of water?
\(\mathrm{2H_2(g) + O_2(g) \rightarrow 2H_2O(g); ~\Delta_rH^\circ = -483.64~ kJ }\)
What is the enthalpy change (in KJ) for the decomposition of one mole of water?
| 1. | 120.9 | 2. | 241.82 |
| 3. | 18 | 4. | 100 |
Subtopic: Thermochemistry |
89%
Level 1: 80%+
NEET - 2023
Hints
Which of the following aqueous solutions of electrolytes will exhibit the least elevation in boiling point?
| 1. | 0.05 M NaCl | 2. | 0.1 M KCl |
| 3. | 0.1 M MgSO4 | 4. | 0.1 M NaCl |
Subtopic: Van’t Hoff Factor |
80%
Level 1: 80%+
NEET - 2023
Hints
Subtopic: Chemical Properties |
59%
Level 3: 35%-60%
NEET - 2023
Hints
Subtopic: Alcohols: Preparation & Properties | Mechanism of Dehydration, Methanol & Ethanol |
65%
Level 2: 60%+
NEET - 2023
Hints
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