In a gravitational field, the gravitational potential is given by; \(V=-\frac{K}{x}~\text{J/kg}.\) The gravitational field intensity at the point \((2,0,3)~\text m\) is:
| 1. | \(+\dfrac K2\) | 2. | \(-\dfrac{K}{2}\) |
| 3. | \(-\dfrac{K}{4}\) | 4. | \(+\dfrac K4\) |
Subtopic: Gravitational Field |
Level 3: 35%-60%
NEET - 2022
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The magnetic field on the axis of a circular loop of radius \(100~\text{cm}\) carrying current \(I=\sqrt{2}~\text{A},\) at a point \(1~\text{m}\) away from the centre of the loop is given by:
| 1. | \(3.14 \times 10^{-7} ~\text{T} \) | 2. | \(6.28 \times 10^{-7} ~\text{T} \) |
| 3. | \(3.14 \times 10^{-4} ~\text{T} \) | 4. | \(6.28 \times 10^{-4} ~\text{T}\) |
Subtopic: Magnetic Field due to various cases |
59%
Level 3: 35%-60%
NEET - 2022
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Two rods, one made of copper and the other made of steel, of the same length and same cross-sectional area are joined together. The thermal conductivity of copper and steel are \(385~\text{Js}^{-1}\text{K}^{-1}\text{m}^{-1}\) and \(50~\text{Js}^{-1}\text{K}^{-1}\text{m}^{-1}\) respectively. The free ends of copper and steel are held at \(100^\circ \text{C}\) and \(0^\circ \text{C}\) respectively. The temperature at the junction is, nearly:
| 1. | \(12^\circ \text{C}\) | 2. | \(50^\circ \text{C}\) |
| 3. | \(73^\circ \text{C}\) | 4. | \(88.5^\circ \text{C}\) |
Subtopic: Conduction |
74%
Level 2: 60%+
NEET - 2022
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The ratio of Coulomb's electrostatic force to the gravitational force between an electron and a proton separated by some distance is \(2.4\times 10^{39}.\) The ratio of the proportionality constant, \(k=\dfrac{1}{4\pi\varepsilon_0}\) to the gravitational constant \(G\) is nearly:
(Given that the charge of the proton and electron each \(=1.6\times 10^{-19},\) the mass of the electron \(=9.11\times 10^{-31}~\text{kg},\) the mass of the proton \(=1.67\times 10^{-27}~\text{kg}\) )
(Given that the charge of the proton and electron each \(=1.6\times 10^{-19},\) the mass of the electron \(=9.11\times 10^{-31}~\text{kg},\) the mass of the proton \(=1.67\times 10^{-27}~\text{kg}\) )
| 1. | \(10^{20}\) | 2. | \(10^{30}\) |
| 3. | \(10^{40}\) | 4. | \(10\) |
Subtopic: Coulomb's Law |
62%
Level 2: 60%+
NEET - 2022
Hints
The percentage error in the measurement of \(g\) is:
(Given, \(g=\frac{4\pi^2L}{T^2},L=(10\pm0.1)~\text{cm, }T=(100\pm1)~\text s\))
1. \(2\%\)
2. \(5\%\)
3. \(3\%\)
4. \(7\%\)
(Given, \(g=\frac{4\pi^2L}{T^2},L=(10\pm0.1)~\text{cm, }T=(100\pm1)~\text s\))
1. \(2\%\)
2. \(5\%\)
3. \(3\%\)
4. \(7\%\)
Subtopic: Errors |
77%
Level 2: 60%+
NEET - 2022
Hints
The correct order of bond angles in the following compounds/ species is:
| 1. | \(\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_3<\mathrm{NH}_4^{+}<\mathrm{CO}_2 \) |
| 2. | \(\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_4^{+}<\mathrm{NH}_3<\mathrm{CO}_2 \) |
| 3. | \(\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_4^{+}=\mathrm{NH}_3<\mathrm{CO}_2 \) |
| 4. | \(\mathrm{CO}_2<\mathrm{NH}_3<\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_4^{+} \) |
Subtopic: V.S.E.P.R & V.B.T |
67%
Level 2: 60%+
NEET - 2022
Hints
KH value for some gases at the same temperature 'T' are given:
KH is Henry's Law constant in water. The order of their solubility in water is :
| gas | KH/k bar |
| Ar | 40.3 |
| CO2 | 1.67 |
| HCHO | 1.83 × 10–5 |
| CH4 | 0.413 |
| 1. | Ar < CO2 < CH4 < HCHO |
| 2. | Ar < CH4 < CO2 < HCHO |
| 3. | HCHO < CO2 < CH4 < Ar |
| 4. | HCHO < CH4 < CO2 < Ar |
Subtopic: Concentration Terms & Henry's Law |
79%
Level 2: 60%+
NEET - 2022
Hints
The nitrogen oxide(s) that contain(s) N-N bond(s) is(are):
A. \(N_2O\)
B. \(N_2O_3\)
C. \(N_2O_4\)
D. \(N_2O_5\)
A. \(N_2O\)
B. \(N_2O_3\)
C. \(N_2O_4\)
D. \(N_2O_5\)
| 1. | A, B, and C | 2. | B and C |
| 3. | D only | 4. | A only |
Subtopic: Group 15 - Preparation, Properties & Uses |
52%
Level 3: 35%-60%
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With the electronegativity values provided (H = 2.1, F = 4, Cl = 3.0, Br = 2.8, I = 2.3, N = 3.0), the correct order of decreasing electronegativity difference of the following compounds is:
1. \(\mathrm{NCl}_3>\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}>\mathrm{HI}\)
2. \(\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}>\mathrm{HI}>\mathrm{NCl}_3\)
3. \(\mathrm{HI}>\mathrm{HBr}>\mathrm{HCl}>\mathrm{HF}>\mathrm{NCl}_3\)
4. \(\mathrm{HF}>\mathrm{HCl}>\mathrm{NCl}_3>\mathrm{HBr}>\mathrm{HI}\)
1. \(\mathrm{NCl}_3>\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}>\mathrm{HI}\)
2. \(\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}>\mathrm{HI}>\mathrm{NCl}_3\)
3. \(\mathrm{HI}>\mathrm{HBr}>\mathrm{HCl}>\mathrm{HF}>\mathrm{NCl}_3\)
4. \(\mathrm{HF}>\mathrm{HCl}>\mathrm{NCl}_3>\mathrm{HBr}>\mathrm{HI}\)
Subtopic: Electronegativity |
61%
Level 2: 60%+
Please attempt this question first.
Hints
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Subtopic: Aldehydes & Ketones: Preparation & Properties | Carboxylic Acids: Preparation & Properties | Name Reaction |
64%
Level 2: 60%+
NEET - 2022
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