The major product C in the below-mentioned reaction is:
| 1. | Propan-1-ol | 2. | Propan-2-ol |
| 3. | Propane | 4. | Propyne |
Subtopic: Mechanism of Reactions |
81%
Level 1: 80%+
NEET - 2024
Hints
The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is:
| 1. | Aniline | 2. | Pyridine |
| 3. | N-Methylaniline | 4. | Triethylamine |
Subtopic: Mechanism |
84%
Level 1: 80%+
NEET - 2024
Hints
For an endothermic reaction:
A. \(q_p \) (heat at constant pressure) is negative.
B. \(\Delta _r H \) (enthalpy change of the reaction) is positive.
C. \(\Delta _r H \) is negative.
D. \(q_p \) is positive.
Which of the following combinations is correct?
A. \(q_p \) (heat at constant pressure) is negative.
B. \(\Delta _r H \) (enthalpy change of the reaction) is positive.
C. \(\Delta _r H \) is negative.
D. \(q_p \) is positive.
Which of the following combinations is correct?
| 1. | B and D | 2. | C and D |
| 3. | A and B | 4. | A and C |
Subtopic: Thermodynamics' Properties and process |
73%
Level 2: 60%+
NEET - 2024
Hints
1.0 g of \(H_2\) has same number of molecules as in:
| 1. | 14 g of \(N_2\) | 2. | 18 g of \(H_2O\) |
| 3. | 16 g of CO | 4. | 28 g of \(N_2\) |
Subtopic: Moles, Atoms & Electrons |
80%
Level 1: 80%+
NEET - 2024
Hints
An organic compound that is immiscible with water and undergoes steam distillation has a normal boiling point of 250 °C. At what temperature does the mixture of this compound and water distill during steam distillation?
1. Above 100 °C but significantly below 250 °C2. Above 250 °C
3. At 250 °C
4. Slightly below 100 °C
Subtopic: Qualitative Analysis of Organic Compounds |
Level 4: Below 35%
NEET - 2024
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
| Statement I: | Glycogen is similar to amylose in its structure. |
| Statement II: | Glycogen is found in yeast and fungi also. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Polysaccharides & their Importance |
Level 3: 35%-60%
NEET - 2024
Hints
In the following reaction involving manganese:
3MnO₄²⁻ + 4H⁺ → 2MnO₄⁻ + MnO₂ + 2H₂O
Which oxidation state of manganese is not observed in the reaction?
A. +6
B. +2
C. +4
D. +7
E. +3
Mark the most appropriate answer from the options given below:
| 1. | D and E only | 2. | B and D only |
| 3. | A and B only | 4. | B and E only |
Subtopic: Introduction to Redox and Oxidation Number |
81%
Level 1: 80%+
NEET - 2024
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
| Statement I: | The Balmer spectral line for H atom with lowest energy appears at \(\dfrac 5{36}\mathrm{ R_H~ cm^{-1}}\) (\(\mathrm{R_H}\) = Rydberg constant) |
| Statement II: | When the temperature of a black body increases, the maxima of the curve (intensity versus wavelength) shifts towards shorter wavelength. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Bohr's Theory | Planck's Theory |
67%
Level 2: 60%+
NEET - 2024
Hints
Identify D in the following sequence of reactions:
| 1. | n-Propyl alcohol | 2. | Isopropyl alcohol |
| 3. | Propanal | 4. | Propionic acid |
Subtopic: Alcohols: Preparation & Properties |
64%
Level 2: 60%+
NEET - 2024
Hints
Identify the incorrect statement.
| 1. | \(\mathrm{PEt}_3\) and \(\mathrm{Asph}_3\) as ligands can form \(\mathrm{d} \pi-\mathrm{d} \pi\) bond with transition metals. |
| 2. | The \(\mathrm{N}-\mathrm{N}\) single bond is as strong as the \(\mathrm{P}-\mathrm{P}\) single bond. |
| 3. | Nitrogen has unique ability to form \(\mathrm{p \pi-p \pi}\) multiple bonds with nitrogen, carbon and oxygen. |
| 4. | Nitrogen cannot form \(\mathrm{d} \pi-\mathrm{p} \pi\) bond as other heavier elements of its group. |
Subtopic: Group 15 - Preparation, Properties & Uses |
77%
Level 2: 60%+
NEET - 2024
Hints
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