NEET 2017 Question Paper with Solutions

A U tube with both ends open to the atmosphere is partially filled with water. Oil which is immiscible with water is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is \(425\ \text{kg m}^{-3}\) \(800\ \text{kg m}^{-3}\) \(928\ \text{kg m}^{-3}\) \(650\ \text{kg m}^{-3}\)

Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m \(s^{-1}\). Take 'g' constant with a value 10 m \(s^{-2}\). The work done by the (i) gravitational force and the (ii) resistive force of air is (i) 1.25 J (ii) -8.25 J (i) 100 J (ii) 8.75 J (i) 10 J (ii) -8.75 J (i) -10 J (ii) -8.25 J

A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled the power radiated in watt would be 450 1000 1800 225

The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then d = 1 km d = 3/2 km d = 2 km d = 1/2 km

A physical quantity of the dimensions of length that can be formed out of c G and \(\frac{e^2}{4\pi\epsilon_0}\) is [c is velocity of light G is the universal constant of gravitation and e is charge] \(c^2[G\frac{e^2}{4\pi\epsilon_0}]^{1/2}\) \(\frac{1}{c^2}[\frac{e^2}{G4\pi\epsilon_0}]^{1/2}\) \(\frac{1}{c}[G\frac{e^2}{4\pi\epsilon_0}]^{1/2}\) \(\frac{1}{c^2}[G\frac{e^2}{4\pi\epsilon_0}]^{1/2}\)

For a given reaction \(\Delta H = 35.5\ \text{kJ mol}^{-1}\) and \(\Delta S = 83.6\ \text{J K}^{-1}\ \text{mol}^{-1}\). The reaction is spontaneous at (Assume that \(\Delta H\) and \(\Delta S\) do not vary with temperature.) T > 425 K all temperatures T > 298 K T < 425 K

Which of the following pairs of compounds is isostructural? \(TeI_2 XeF_2\) \(IBr_2^- XeF_2\) \(IF_3 XeF_2\) \(BeCl_2 XeF_2\)

Which one is the wrong statement? The uncertainty principle is \(\Delta E \times \Delta t \ge \frac{h}{4\pi}\) Half filled and fully filled orbitals have greater stability due to greater exchange energy greater symmetry and more balanced arrangement. The energy of 2s-orbital is less than the energy of 2p-orbital in case of hydrogen like atoms. de-Broglie's wavelength is given by \(\lambda = \frac{h}{mv}\) where m = mass of the particle v = group velocity of the particle.

Predict the correct intermediate and product in the following reaction: \(H_3C-C \equiv CH \xrightarrow[HgSO_4]{H_2O H_2SO_4} \text{(A) Intermediate} \rightarrow \text{(B) Product}\)

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field? K Rb Li Na

Suppose the charge of a proton and an electron differ slightly. One of them is \(-e\) the other is \((e + \Delta e)\). If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero then \(\Delta e\) is of the order of [Given: mass of hydrogen \(m_h = 1.67 \times 10^{-27}\ \text{kg}\)] \(10^{-23}\ \text{C}\) \(10^{-37}\ \text{C}\) \(10^{-47}\ \text{C}\) \(10^{-20}\ \text{C}\)

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle \(\theta\) the spot of the light is found to move through a distance y on the scale. The angle \(\theta\) is given by \(\frac{y}{x}\) \(\frac{x}{2y}\) \(\frac{x}{y}\) \(\frac{y}{2x}\)

In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is 3 k\(\Omega\). If current gain is 100 and the base resistance is 2 k\(\Omega\) the voltage and power gain of the amplifier is 15 and 200 150 and 15000 20 and 2000 200 and 1000

Radioactive material 'A' has decay constant '\(8\lambda\)' and material 'B' has decay constant '\(\lambda\)'. Initially they have same number of nuclei. After what time the ratio of number of nuclei of material 'B' to that 'A' will be e? \(\frac{1}{7\lambda}\) \(\frac{1}{8\lambda}\) \(\frac{1}{9\lambda}\) \(\frac{1}{\lambda}\)

A thin prism having refracting angle \(10^\circ\) is made of glass of refractive index 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be \(6^\circ\) \(8^\circ\) \(10^\circ\) \(4^\circ\)

Which of the following is a sink for CO? Microorganisms present in the soil Oceans Plants Haemoglobin

Mechanism of a hypothetical reaction \(X_2 + Y_2 \rightarrow 2XY\) is given below: (i) \(X_2 \rightarrow X + X\) (fast) (ii) \(X + Y_2 \rightarrow XY + Y\) (slow) (iii) \(X + Y \rightarrow XY\) (fast) The overall order of the reaction will be 2 0 1.5 1

In the electrochemical cell: \(Zn|ZnSO_4(0.01M)||CuSO_4(1.0M)|Cu\) the emf of this Daniell cell is \(E_1\). When the concentration of \(ZnSO_4\) is changed to 1.0 M and that of \(CuSO_4\) changed to 0.01 M the emf changes to \(E_2\). From the followings which one is the relationship between \(E_1\) and \(E_2\)? (Given RT/F = 0.059) \(E_1 E_2\) \(E_2 = 0.1E_1\) \(E_1 = E_2\)

Identify A and predict the type of reaction.

In which pair of ions both the species contain S-S bond? \(S_4O_6^{2-} S_2O_3^{2-}\) \(S_2O_7^{2-} S_2O_8^{2-}\) \(S_4O_6^{2-} S_2O_7^{2-}\) \(S_2O_7^{2-} S_2O_3^{2-}\)