An incorrect statement among the following regarding hydrogen is:
| 1. | Hydrogen never acts as a cation in ionic salts. |
| 2. | Hydronium ion, H3O+ exists freely in a solution. |
| 3. | Dihydrogen does not act as a reducing agent. |
| 4. | Hydrogen has three isotopes of which protium is the most common. |
Subtopic: Preparation & Properties |
65%
Level 2: 60%+
NEET - 2016
Hints
Consider the following liquid-vapor equilibrium
Liquid ↔ Vapour
Which of the following relation is correct?
Liquid ↔ Vapour
Which of the following relation is correct?
| 1. | \(\dfrac{dlnp}{dT}=\frac{-\Delta H_v}{RT}\) | 2. | \(\dfrac{dlnp}{dT^2}=\frac{-\Delta H_v}{T^2}\) |
| 3. | \(\dfrac{dlnp}{dT}=\frac{\Delta H_v}{RT^2}\) | 4. | \(\dfrac{dlnG}{dT^2}=\frac{-\Delta H_v}{RT^2}\) |
Subtopic: Introduction & Colligative properties |
Level 3: 35%-60%
NEET - 2016
Hints
Subtopic: Isomerism & Chirality |
57%
Level 3: 35%-60%
NEET - 2016
Hints
Which of the following statements is false?
| 1. | Ca2+ ions are important in blood clotting |
| 2. | Ca2+ ions are not important in maintaining the regular beating of the heart |
| 3. | Mg2+ ions are important in the green parts of plants |
| 4. | Mg2+ ions form a complex with ATP |
Subtopic: Biological Importance of S Block Elements and & Its Ore |
78%
Level 2: 60%+
NEET - 2016
Hints
The ionic radii of A+ and B- ions are 0.98 x10-10 m and 1.81 x10-10 m. The coordination number of each ion in AB is:
1. 8
2. 2
3. 6
4. 4
Subtopic: Voids, Radius Ratio & Coordination Number |
69%
Level 2: 60%+
NEET - 2016
Hints
Links
A capacitor of \(2~\mu\text{F}\) is charged as shown in the figure. When the switch \({S}\) is turned to position \(2,\) the percentage of its stored energy dissipated is:
1. \(20\%\)
2. \(75\%\)
3. \(80\%\)
4. \(0\%\)
2. \(75\%\)
3. \(80\%\)
4. \(0\%\)
Subtopic: Energy stored in Capacitor |
70%
Level 2: 60%+
NEET - 2016
Hints
Links
To get output \(Y=1\) for the following circuit, the correct choice for the input is:
| 1. | \(A=1,~ B= 0, ~C=0\) |
| 2. | \(A=1,~ B= 1, ~C=0\) |
| 3. | \(A=1,~ B= 0, ~C=1\) |
| 4. | \(A=0,~ B= 1, ~C=0\) |
Subtopic: Logic gates |
90%
Level 1: 80%+
NEET - 2016
Hints
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite directions. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf of the two cells is:
1. 5 : 4
2. 3 : 4
3. 3 : 2
4. 5 : 1
2. 3 : 4
3. 3 : 2
4. 5 : 1
66%
Level 2: 60%+
NEET - 2016
Hints
Links
When a metallic surface is illuminated with radiation of wavelength \(\lambda\), the stopping potential is \({V}\). If the same surface is illuminated with radiation of wavelength \(2\lambda\), the stopping potential is \(\frac{{V}}{4}\). The threshold wavelength for the metallic surface is:
| 1. | \(5\lambda\) | 2. | \(\frac{5}{2} \lambda\) |
| 3. | \(3\lambda\) | 4. | \(4\lambda\) |
Subtopic: Einstein's Photoelectric Equation |
77%
Level 2: 60%+
NEET - 2016
Hints
Links
Two non-mixing liquids of densities \(\rho\) and \(n\rho\) \((n>1)\) are put in a container. The height of each liquid is \(h.\) A solid cylinder of length \(L\) and density \(d\) is put in this container. The cylinder floats with its axis vertical and length \(rL~(r<1))\) in the denser liquid. The density \(d\) is equal to:
| 1. | \([2+(n+1)r ]\rho\) | 2. | \([2+(n-1)r] \rho\) |
| 3. | \([1+(n-1)r] \rho\) | 4. | \([1+(n+1)r ]\rho\) |
Subtopic: Archimedes' Principle |
65%
Level 2: 60%+
NEET - 2016
Hints
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