The incorrect statement about the denaturation of proteins is:
| 1. | It results due to change of temperature and pH. |
| 2. | It results in the loss of biological activity of proteins. |
| 3. | A protein is formed from amino acids linked by peptide bonds. |
| 4. | Uncoiling of the helical structure takes place. |
Subtopic: Denaturation of Proteins & Chemical Properties |
67%
Level 2: 60%+
NEET - 2022
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Subtopic: Acid Derivatives - Preparation, Properties & Uses |
54%
Level 3: 35%-60%
NEET - 2022
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Select the correct option based on the statements below:
| Assertion (A): | Chlorine is an electron-withdrawing group, yet it exhibits ortho- and para-directing behavior in electrophilic aromatic substitution. |
| Reason (R): | Inductive effect of chlorine destabilises the intermediate carbocation formed during the electrophilic substitution, however due to the more pronounced resonance effect, the halogen stabilises the carbocation at ortho and para positions. |
| 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: Electron Displacement Effects |
78%
Level 2: 60%+
NEET - 2022
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Which of the following reactions is not an example of nucleophilic addition–elimination reaction?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Isomers & Reaction Mechanism |
71%
Level 2: 60%+
NEET - 2022
Hints
The decrease in size from left to right in the actinoid series is greater and more gradual than that in the lanthanoid series due to:
| 1. | 4f orbitals are penultimate |
| 2. | 4f orbitals have a greater shielding effect |
| 3. | 5f orbitals have a poor shielding effect |
| 4. | 5f orbitals have a greater shielding effect |
Subtopic: Lanthanoid & Actinoids Contraction |
80%
Level 1: 80%+
NEET - 2022
Hints
What is the correct order of boiling points for the following compounds, arranged from the highest to the lowest?
(a) Heptane
(b) Butane
(c) 2-Methylbutane
(d) 2-Methylpropane
(e) Hexane
Choose the correct option from the following:
1. (a) > (c) > (e) > (d) > (b)
2. (c) > (d) > (a) > (e) > (b)
3. (a) > (e) > (b) > (c) > (d)
4. (a) > (e) > (c) > (b) > (d)
(a) Heptane
(b) Butane
(c) 2-Methylbutane
(d) 2-Methylpropane
(e) Hexane
Choose the correct option from the following:
1. (a) > (c) > (e) > (d) > (b)
2. (c) > (d) > (a) > (e) > (b)
3. (a) > (e) > (b) > (c) > (d)
4. (a) > (e) > (c) > (b) > (d)
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
55%
Level 3: 35%-60%
NEET - 2022
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Match the reagents (List-I) with the products (List-II) obtained from phenol:
| List-I | List-II | ||
| (A) | (i) NaOH (ii) CO2 (iii) H+ |
(I) | Benzoquinone |
| (B) | (i) Aqueous NaOH + CHCl3 (ii) H+ |
(II) | Benzene |
| (C) | Zn dust, \(\Delta\) | (III) | Salicylaldehyde |
| (D) | Na2Cr2O7, H2SO4 | (IV) | Salicylic acid |
| (A) | (B) | (C) | (D) | |
| 1. | (III) | (IV) | (I) | (II) |
| 2. | (II) | (I) | (IV) | (III) |
| 3. | (IV) | (III) | (II) | (I) |
| 4. | (IV) | (II) | (I) | (III) |
Subtopic: Phenols: Preparation & Properties |
90%
Level 1: 80%+
NEET - 2022
Hints
Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I (quantum number) |
List-II (Orbital) |
||
| (A) | n = 2, \(\ell\) = 1 | (I) | 2s |
| (B) | n = 3, \(\ell\) = 2 | (II) | 3s |
| (C) | n = 3, \(\ell\) = 0 | (III) | 2p |
| (D) | n = 2, \(\ell\) = 0 | (IV) | 3d |
| (A) | (B) | (C) | (D) | |
| 1. | (III) | (IV) | (I) | (II) |
| 2. | (IV) | (III) | (I) | (II) |
| 3. | (IV) | (III) | (II) | (I) |
| 4. | (III) | (IV) | (II) | (I) |
Subtopic: Shell & Subshell |
84%
Level 1: 80%+
NEET - 2022
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When electromagnetic radiation of wavelength 300 nm falls on the surface of a metal, electrons are emitted with the kinetic energy of 1.68 × 105 J mol–1. The minimum energy needed to remove one mole of electron from the metal is:
(GivenL: h = 6.626 × 10–34 Js, c = 3 × 108 ms–1, NA = 6.022 × 1023 mol–1)
1. 2.31 × 106 J mol–1
2. 3.84 × 104 J mol–1
3. 3.84 × 10–19 J mol–1
4. 2.31 × 105 J mol–1
(GivenL: h = 6.626 × 10–34 Js, c = 3 × 108 ms–1, NA = 6.022 × 1023 mol–1)
1. 2.31 × 106 J mol–1
2. 3.84 × 104 J mol–1
3. 3.84 × 10–19 J mol–1
4. 2.31 × 105 J mol–1
Subtopic: Photo Electric Effect |
Level 3: 35%-60%
NEET - 2022
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For a chemical reaction, 4A + 3B → 6C + 9D
rate of formation of C is 6 × 10–2 mol L–1 s–1 and rate of disappearance of A is 4 × 10–2 mol L–1 s–1. The rate of reaction and amount of B consumed in an interval of 10 seconds, respectively will be:
rate of formation of C is 6 × 10–2 mol L–1 s–1 and rate of disappearance of A is 4 × 10–2 mol L–1 s–1. The rate of reaction and amount of B consumed in an interval of 10 seconds, respectively will be:
| 1. | 1 × 10–2 mol L–1 s–1 and 30 × 10–2 mol L–1 |
| 2. | 10 × 10–2 mol L–1 s–1 and 10 × 10–2 mol L–1 |
| 3. | 1 × 10–2 mol L–1 s–1 and 10 × 10–2 mol L–1 |
| 4. | 10 × 10–2 mol L–1 s–1 and 30 × 10–2 mol L–1 |
Subtopic: Definition, Rate Constant, Rate Law |
71%
Level 2: 60%+
NEET - 2022
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