Identify the incorrect statement:
1.
The oxidation state and coordination number (or covalency) of \(\mathrm{Al}\) in\( \left[\mathrm{AlCl}\left(\mathrm{{H}_2 {O}}\right)_5\right]^{2+} \) are +3 and 6, respectively.
2.
\(\mathrm{Na}_2 \mathrm{O}\) is a basic oxide and \(\mathrm{Cl}_2 \mathrm{O}_7\) is an acidic oxide
3.
The following four species are called isoelectronic species: \( \mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+} \mathrm{and}~ \mathrm{Mg}^{2+}\)
4.
Among the four species \(\mathrm{Mg}, \mathrm{Al}, \mathrm{Mg}^{2+}\) and \(\mathrm{A l^{3+},}\) the smallest one is \(\mathrm{Al}.\)
Subtopic: Nature of Compound |
79%
Level 2: 60%+
NEET - 2024
Hints
Which of the following is not the characteristic feature of genetic code?
| 1. | The codon is triplet |
| 2. | The code is nearly universal |
| 3. | The code has punctuations |
| 4. | Some amino acids are coded by more than one codon, hence the code is degenerate |
Subtopic: Genetic Code |
89%
Level 1: 80%+
NEET - 2024
Hints
The length of a magnetized iron bar is \(L\) and its magnetic moment is \(M.\) When this bar is bent to form a semicircle its magnetic moment is:
| 1. | \(M\) | 2. | \(\dfrac{M\pi}{2}\) |
| 3. | \( \dfrac{M}{2\pi}\) | 4. | \(\dfrac{2M}{\pi}\) |
Subtopic: Bar Magnet |
75%
Level 2: 60%+
NEET - 2024
Hints
Name the hormone(s) not secreted by placenta.
A. Estrogens
B. Progestogens
C. Relaxin and Inhibin
D. hCG
E. hPL
Choose the correct answer from the options given below:
A. Estrogens
B. Progestogens
C. Relaxin and Inhibin
D. hCG
E. hPL
Choose the correct answer from the options given below:
| 1. | D and E only | 2. | C only |
| 3. | B only | 4. | A and C only |
Subtopic: Embryonic Development till Gastrulation |
65%
Level 2: 60%+
NEET - 2024
Hints
A rod of length \(L\) rotates with a small uniform angular velocity \(\omega\) about its perpendicular bisector. A uniform magnetic field \(B\) 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 |
Level 3: 35%-60%
NEET - 2024
Hints
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. | \(2 \mathrm{H}_2 \mathrm{O}_{2(aq)} \rightarrow 2 \mathrm{H}_2 \mathrm{O}_{(l)}+\mathrm{O}_{2(g)}\) |
Subtopic: Redox Titration & Type of Redox |
57%
Level 3: 35%-60%
NEET - 2024
Hints
Consider a thin circular ring \((A),\) a circular disc \((B),\) a hollow cylinder \((C)\) and a solid cylinder \((D)\) of the same radii \(R\) and of the same masses.
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:
 |
 |
| \((A)\) | \((B)\) |
 |
 |
| \((C)\) | \((D)\) |
| 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 |
66%
Level 2: 60%+
NEET - 2024
Hints
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 |
Subtopic: Medical Termination of Pregnancy |
61%
Level 2: 60%+
NEET - 2024
Hints
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: Applications of PN junction |
57%
Level 3: 35%-60%
NEET - 2024
Hints
Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I (Amine) |
List-II \(\textbf{(pK}_{b} ~\textbf{value}) \) |
||
| 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 |
69%
Level 2: 60%+
NEET - 2024
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