A constant voltage of \(50~\text{V}\) is maintained between the points \(A\) and \(B\) of the circuit shown in the figure. The current through the branch \(C D\) of the circuit is:
| 1. | \(2.5~\text{A}\) | 2. | \(3.0~\text{A}\) |
| 3. | \(1.5~\text{A}\) | 4. | \(2.0~\text{A}\) |
Subtopic: Kirchoff's Voltage Law |
Level 3: 35%-60%
NEET - 2025
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The plates of a parallel plate capacitor are separated by \(d.\) Two slabs of different dielectric constant \(K_1\) and \(K_2\) with thickness \(\dfrac{3}{8} d\) and \(\dfrac{d}{2},\) respectively are inserted in the capacitor. Due to this, the capacitance become two times larger than when there is nothing between the plates.
If \(K_1=1.25 ~K_2,\) the value of \(K_1\) is:
1. \(1.60\)
2. \(1.33\)
3. \(2.66\)
4. \(2.33\)
If \(K_1=1.25 ~K_2,\) the value of \(K_1\) is:
1. \(1.60\)
2. \(1.33\)
3. \(2.66\)
4. \(2.33\)
Subtopic: Dielectrics in Capacitors |
Level 3: 35%-60%
NEET - 2025
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Consider the diameter of a spherical object being measured with the help of a Vernier callipers. Suppose its \(10\) Vernier Scale Divisions (V.S.D.) are equal to its \(9\) Main Scale Divisions (M.S.D.). The least division in the M.S. is \(0.1\text{ cm}\) and the zero of V.S. is at \(x=0.1~ \text{cm}\) when the jaws of Vernier callipers are closed. If the main scale reading for the diameter is \({M}=5~\text{cm}\) and the number of coinciding vernier division is \(8 ,\) the measured diameter after zero error correction, is:
| 1. | \(4.98 ~\text{cm}\) | 2. | \(5.00 ~\text{cm}\) |
| 3. | \(5.18 ~\text{cm}\) | 4. | \(5.08 ~\text{cm}\) |
Subtopic: Measurement & Measuring Devices |
Level 3: 35%-60%
NEET - 2025
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A \(2~\text{amp}\) current is flowing through two different small circular copper coils having radii ratio \(1:2.\) The ratio of their respective magnetic moments will be:
| 1. | \(2: 1\) | 2. | \(4: 1\) |
| 3. | \(1: 4\) | 4. | \(1: 2\) |
Subtopic: Magnetic Moment |
60%
Level 2: 60%+
NEET - 2025
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Consider a water tank shown in the figure. It has one wall at \(x=L\) and can be taken to be very wide in the \(z\) direction. When filled with a liquid of surface tension \(S\) and density \(\rho,\) the liquid, surface makes angle \(\theta_{0}\left(\theta_0 \ll 1\right)\) with the \(x\text-\)axis at \(x=L.\) If \(y(x)\) is the height of the surface then the equation for \(y(x)\) is:
(take \(\theta(x)=\sin \theta(x)=\tan \theta(x)=\dfrac{d y}{d x}, g\) is the acceleration due to gravity)
(take \(\theta(x)=\sin \theta(x)=\tan \theta(x)=\dfrac{d y}{d x}, g\) is the acceleration due to gravity)
| 1. | \(\dfrac{d^2 y}{d x^2}=\sqrt{\dfrac{\rho g}{S}}\) | 2. | \(\dfrac{d y}{d x}=\sqrt{\dfrac{\rho g}{S}} x\) |
| 3. | \(\dfrac{d^2 y}{d x^2}=\dfrac{\rho g}{S} x\) | 4. | \(\dfrac{d^2 y}{d x^2}=\dfrac{\rho g}{S} y\) |
Subtopic: Surface Tension |
Level 4: Below 35%
NEET - 2025
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Identify the suitable reagent for the following conversion:
| 1. | (i) \(NaBH_4\), (ii) \(H^+/H_2O\) | 2. | \(H_2/ Pd-BaSO_4\) |
| 3. | (i) \(LiAlH_4\), (ii) \(H^+/H_2O\) | 4. | (i)\(AlH(iBu)_2\)(ii) \(H_2O\) |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
Level 3: 35%-60%
NEET - 2025
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The correct order of decreasing acidity of the following aliphatic acids is:
| 1. | \(\small {\mathrm{HCOOH}>\mathrm{CH}_3 \mathrm{COOH}> \left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH} }\) \(\small {> \left(\mathrm{CH}_3\right)_3 \mathrm{CCOOH}} \) |
| 2. | \(\small {\mathrm{HCOOH}>\left(\mathrm{CH}_3\right)_3 \mathrm{CCOOH}> \left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH}}\) \( \small{ > \mathrm{CH}_3 \mathrm{COOH}} \) |
| 3. | \(\small { \left(\mathrm{CH}_3\right)_3 \mathrm{CCOOH}>\left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH}> \mathrm{CH}_3 \mathrm{COOH}}\) \(\small {>\mathrm{HCOOH}} \) |
| 4. | \(\small {\mathrm{CH}_3 \mathrm{COOH}>\left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH}> \left(\mathrm{CH}_3\right)_3\mathrm{CCOOH} }\) \(\small {>\mathrm{HCOOH}} \) |
Subtopic: Carboxylic Acids: Preparation & Properties |
64%
Level 2: 60%+
NEET - 2025
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Which one of the following reactions does not belong to "Lassaigne's test"?
| 1. | \(\mathrm{Na}+\mathrm{X} \underset{\Delta}{\longrightarrow}+\mathrm{NaX} \) |
| 2. | \(2 \mathrm{CuO}+\mathrm{C} \xrightarrow[\Delta]{} 2 \mathrm{Cu}+\mathrm{CO}_2 \) |
| 3. | \(\mathrm{Na}+\mathrm{C}+\mathrm{N} \xrightarrow[\Delta]{} \mathrm{NaCN} \) |
| 4. | \(2 \mathrm{Na}+\mathrm{S} \xrightarrow[\Delta]{} \mathrm{Na}_2 \mathrm{~S}\) |
Subtopic: Qualitative Analysis of Organic Compounds |
68%
Level 2: 60%+
NEET - 2025
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If the rate constant of a reaction is \(0.03 s^{-1}\), how much time does it take for \(7.2\text { mol L}^{-1}\) concentration of the reactant to get reduced to \(0.9~\text {mol L} ^{-1}?\)
(Given: log 2=0.301)
1. 210 s
2. 21.0 s
3. 69.3 s
4. 23.1 s
(Given: log 2=0.301)
1. 210 s
2. 21.0 s
3. 69.3 s
4. 23.1 s
Subtopic: First Order Reaction Kinetics |
66%
Level 2: 60%+
NEET - 2025
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Given below are two statements:
| Statement I: | A hypothetical diatomic molecule with bond order zero is quite stable. |
| Statement II: | As bond order increases, the bond length increases. |
| 1. | Statement I is True but Statement II is False. |
| 2. | Statement I is False but Statement II is True. |
| 3. | Both Statement I and Statement II are True. |
| 4. | Both Statement I and Statement II are False. |
Subtopic: M.O.T |
51%
Level 3: 35%-60%
NEET - 2025
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