A rod of length \(L\) rotates with a small uniform angular velocity \(\omega\) about its perpendicular bisector. A uniform magnetic field \(\mathrm B\) exists parallel to the axis of rotation. The potential difference between the centre of the rod and an end is:
1. \(\large\frac{B\omega L^2}{8}\)
2. \(\large\frac{B\omega L^2}{2}\)
3. \(\large\frac{B\omega L^2}{4}\)
4. zero
Subtopic: Motional emf |
From NCERT
NEET - 2024
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Which of the following reaction is not a disproportionation reaction?
1. \(2 \mathrm{~F}_{2(g)}+2 \mathrm{OH}_{(a q)}^{-} \rightarrow 2 \mathrm{~F}_{(a q)}^{-}+\mathrm{OF}_{2(g)}+\mathrm{H}_2 \mathrm{O}_{(l)}\)
2. \(\mathrm{Cl}_{2(g)}+2 \mathrm{OH}^{-}_{(a q)} \rightarrow \mathrm{ClO}_{(a q)}^{-}+\mathrm{Cl}_{(a q)}^{-}+\mathrm{H}_2 \mathrm{O}_{(l)}\)
3. \(2 \mathrm{NO}_{2(g)}+2 \mathrm{OH}^{-}_{(\mathrm{aq})} \rightarrow \mathrm{NO}_{2(\mathrm{aq})}^{-}+\mathrm{NO}_{3(\mathrm{aq})}^{-}+\mathrm{H}_2 \mathrm{O}_{(l)}\)
4. \(2 \mathrm{H}_2 \mathrm{O}_{2(aq)} \rightarrow 2 \mathrm{H}_2 \mathrm{O}_{(l)}+\mathrm{O}_{2(g)}\)
1. \(2 \mathrm{~F}_{2(g)}+2 \mathrm{OH}_{(a q)}^{-} \rightarrow 2 \mathrm{~F}_{(a q)}^{-}+\mathrm{OF}_{2(g)}+\mathrm{H}_2 \mathrm{O}_{(l)}\)
2. \(\mathrm{Cl}_{2(g)}+2 \mathrm{OH}^{-}_{(a q)} \rightarrow \mathrm{ClO}_{(a q)}^{-}+\mathrm{Cl}_{(a q)}^{-}+\mathrm{H}_2 \mathrm{O}_{(l)}\)
3. \(2 \mathrm{NO}_{2(g)}+2 \mathrm{OH}^{-}_{(\mathrm{aq})} \rightarrow \mathrm{NO}_{2(\mathrm{aq})}^{-}+\mathrm{NO}_{3(\mathrm{aq})}^{-}+\mathrm{H}_2 \mathrm{O}_{(l)}\)
4. \(2 \mathrm{H}_2 \mathrm{O}_{2(aq)} \rightarrow 2 \mathrm{H}_2 \mathrm{O}_{(l)}+\mathrm{O}_{2(g)}\)
Subtopic: Redox Titration & Type of Redox |
61%
From NCERT
NEET - 2024
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Consider a thin circular ring (A), a circular disc (B), a hollow Cylinder (C) and a solid cylinder (D) of the same radius R and of same mass:
If \(I_A, I_B, I_C \) and \(I_D\) are their moments of inertia about the axis shown, then:
Choose the correct answer from the options given below:
1. \({I}_A={I}_C~ \text{and} ~2{I}_B={I}_D\)
2. \(I_A=2 I_B~ \text{and} ~2 I_C=I_D \)
3. \(2 I_A=I_C~ \text{and} ~I_B=2 I_D\)
4. \({I}_{{A}}={I}_B={I}_C=2 {I}_{{D}}\)
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| (A) | (B) |
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 |
| (C) | (D) |
Choose the correct answer from the options given below:
1. \({I}_A={I}_C~ \text{and} ~2{I}_B={I}_D\)
2. \(I_A=2 I_B~ \text{and} ~2 I_C=I_D \)
3. \(2 I_A=I_C~ \text{and} ~I_B=2 I_D\)
4. \({I}_{{A}}={I}_B={I}_C=2 {I}_{{D}}\)
Subtopic: Moment of Inertia |
56%
From NCERT
NEET - 2024
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MTP (Medical Termination of Pregnancy) with oral pills is considered relatively safe up to:
1. 7-9 weeks of pregnancy
2. 15-18 weeks of pregnancy
3. 20-24 weeks of pregnancy
4. 28-30 weeks of pregnancy
1. 7-9 weeks of pregnancy
2. 15-18 weeks of pregnancy
3. 20-24 weeks of pregnancy
4. 28-30 weeks of pregnancy
Subtopic: Medical Termination of Pregnancy |
55%
NEET - 2024
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Zener diode works:
| 1. | in forward bias only. |
| 2. | in reverse bias only. |
| 3. | as a voltage regulator in forward bias and as a simple pn junction diode in reverse bias. |
| 4. | as a voltage regulator in reverse bias and as a simple pn junction diode in forward bias. |
Subtopic: PN junction |
52%
From NCERT
NEET - 2024
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Match List-I with List-II
Choose the correct answer from the options given below:
1. A-II, B-III, C-I, D-IV
2. A-III, B-II, C-I, D-IV
3. A-II, B-I, C-III, D-IV
4. A-I, B-III, C-II, D-IV
| List-I (Amine) |
List-II \(\textbf{(pK}_{\beta} ~\textbf{value}) \) |
||
| A. | Benzenamine | I. | 3.38 |
| B. | Phenylmethanamine | II. | 9.38 |
| C. | Methenamine | III. | 4.70 |
| D. | N-Ethylethanamine | IV. | 3.0 |
1. A-II, B-III, C-I, D-IV
2. A-III, B-II, C-I, D-IV
3. A-II, B-I, C-III, D-IV
4. A-I, B-III, C-II, D-IV
Subtopic: Identification of Primary, Secondary & Tertiary Amines |
67%
From NCERT
NEET - 2024
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Use of hyper immune horse serum raised against a specific pathogen, given to a recipient is an example of:
1. Natural active immunity
2. Artificial active immunity
3. Natural passive immunity
4. Artificial passive immunity
1. Natural active immunity
2. Artificial active immunity
3. Natural passive immunity
4. Artificial passive immunity
Subtopic: Active & Passive Immunity |
65%
NEET - 2024
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Match List-I with List-II
Choose the correct answer from the options given below:
1. A-I, B-II, C-III, D-IV
2. A-IV,B-III, C-II, D-I
3. A-III, B-II, C-I, D-IV
4. A-II, B-III, C-IV, D-I
| List-I (Material) |
List-II (Example) |
||
| A. | Diamagnet | I. | Alnico |
| B. | Paramagnet | II. | Copper |
| C. | Soft ferromagnet | III. | Aluminium |
| D. | Hard ferromagnet | IV. | Gadolinium |
1. A-I, B-II, C-III, D-IV
2. A-IV,B-III, C-II, D-I
3. A-III, B-II, C-I, D-IV
4. A-II, B-III, C-IV, D-I
Subtopic: Magnetic Materials |
From NCERT
NEET - 2024
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Isotope of an element contains \(19.23 \%\) more neutrons as compared to protons. The correct element along with its mass number is:
(Given Atomic number \(\mathrm{Fe: 26, Co: 27}\) )
1. \(\mathrm {^{56}Fe }\)
2. \({ }^{57} \mathrm{Fe}\)
3. \({ }^{57} \mathrm{Co}\)
4. \({ }^{60} \mathrm{Co}\)
(Given Atomic number \(\mathrm{Fe: 26, Co: 27}\) )
1. \(\mathrm {^{56}Fe }\)
2. \({ }^{57} \mathrm{Fe}\)
3. \({ }^{57} \mathrm{Co}\)
4. \({ }^{60} \mathrm{Co}\)
Subtopic: Number of Electron, Proton & Neutron |
55%
From NCERT
NEET - 2024
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Given below are two statements :
In light of the above statements, choose the correct answer from the options given below :
1. Both Statement I and Statement II are True
2. Both Statement I and Statement II are False
3. Statement I is True but Statement II is False
4. Statement I is False but Statement II is True
| Statement I: | When the fitness of one species is significantly lower in the presence of another species, the process is defined as competition. |
| Statement II: | When fungi remain in association with living plants or animals, they are called saprophytes. |
1. Both Statement I and Statement II are True
2. Both Statement I and Statement II are False
3. Statement I is True but Statement II is False
4. Statement I is False but Statement II is True
Subtopic: Population Interactions: Competition | Population Interactions: Commensalism, Protocooperation & Mutualism |
67%
From NCERT
NEET - 2024
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