Which of the following methods is incorrect for the synthesis of alkenes?
1. Treatment of alkynes with Na in liquid NH3
2. Heating alkyl halides with alcoholic KOH
3. Treating alkyl halides in aqueous KOH solution
4. Treating vicinal dihalides with Zn metal
1. Treatment of alkynes with Na in liquid NH3
2. Heating alkyl halides with alcoholic KOH
3. Treating alkyl halides in aqueous KOH solution
4. Treating vicinal dihalides with Zn metal
Subtopic: Chemical Properties |
78%
Level 2: 60%+
NEET - 2022
Hints
Subtopic: Name Reaction |
76%
Level 2: 60%+
NEET - 2022
Hints
What fraction of Fe exists as Fe(III) in Fe0.96O?
(Consider Fe0.96 to be made up of Fe(II) and Fe(III) only)
1. \(\dfrac{1}{12}\)
2. \(0.08\)
3. \(\dfrac{1}{16}\)
4. \(\dfrac{1}{20}\)
(Consider Fe0.96 to be made up of Fe(II) and Fe(III) only)
1. \(\dfrac{1}{12}\)
2. \(0.08\)
3. \(\dfrac{1}{16}\)
4. \(\dfrac{1}{20}\)
Subtopic: Moles, Atoms & Electrons |
Level 3: 35%-60%
NEET - 2022
Hints
Select the correct option based on statements below:
| Assertion (A): | The metal carbon bond in metal carbonyls possesses both \(\sigma\) and \(\pi\) character. |
| Reason (R): | The ligand to metal bond is a \(\pi\) bond and metal to ligand bond is a \(\sigma\) bond. |
| 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: Organometallic Complexes & their Uses |
62%
Level 2: 60%+
NEET - 2022
Hints
Which one of the following reaction sequences is the incorrect method to prepare phenol?
| 1. | Aniline, NaNO2 + HCl, H2O, heating |
| 2. | Cumene, O2, H3O+ |
| 3. |  |
| 4. |  |
Subtopic: Phenols: Preparation & Properties |
68%
Level 2: 60%+
NEET - 2022
Hints
Subtopic: Carboxylic Acids: Preparation & Properties | Acid Derivatives - Preparation, Properties & Uses |
61%
Level 2: 60%+
NEET - 2022
Hints
Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | Cr2+ is oxidising agent and Mn3+ is a reducing agent in nature. |
| Statement II: | Sc3+ compounds are repelled by the applied magnetic field. |
| 1. | Both I and II are correct. |
| 2. | Both I and II are incorrect. |
| 3. | I is correct but II is incorrect. |
| 4. | I is incorrect but II is correct. |
Subtopic: d-Block Elements- Properties & Uses |
55%
Level 3: 35%-60%
NEET - 2022
Hints
Kp for the following reaction is 3.0 at 1000 K.
\(\mathrm{CO_{2}(g)\,+\,C(s)\rightarrow \,2CO(g)}\)
The value of Kc for the reaction at the same temperature is:
(Given: R = 0.083 L bar K–1 mol–1)
\(\mathrm{CO_{2}(g)\,+\,C(s)\rightarrow \,2CO(g)}\)
The value of Kc for the reaction at the same temperature is:
(Given: R = 0.083 L bar K–1 mol–1)
| 1. | 0.36 | 2. | 3.6 × 10–2 |
| 3. | 3.6 × 10–3 | 4. | 3.6 |
Subtopic: Introduction To Equilibrium |
82%
Level 1: 80%+
NEET - 2022
Hints
Standard electrode potential for the cell with cell reaction
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
is 1.1 V. Calculate the standard Gibbs energy change for the cell reaction. (Given F = 96487 C mol–1)
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
is 1.1 V. Calculate the standard Gibbs energy change for the cell reaction. (Given F = 96487 C mol–1)
| 1. | –200.27 kJ mol–1 | 2. | –212.27 kJ mol–1 |
| 3. | –212.27 J mol–1 | 4. | –200.27 J mol–1 |
Subtopic: Relation between Emf, G, Kc & pH |
82%
Level 1: 80%+
NEET - 2022
Hints
Subtopic: Reaction Intermediates ; Preparation & Properties |
78%
Level 2: 60%+
NEET - 2022
Hints
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