NEET 2015 Question Paper with Solutions

4.0 g of a gas occupies 22.4 litres at NTP. The specific heat capacity of the gas at constant volume is \(5.0\ \text{J K}^{-1}\ \text{mol}^{-1}\). If the speed of sound in this gas at NTP is \(952\ \text{m s}^{-1}\) then the heat capacity at constant pressure is (Take gas constant R = \(8.3\ \text{J K}^{-1}\ \text{mol}^{-1}\)) \(7.0\ \text{J K}^{-1}\ \text{mol}^{-1}\) \(8.5\ \text{J K}^{-1}\ \text{mol}^{-1}\) \(8.0\ \text{J K}^{-1}\ \text{mol}^{-1}\) \(7.5\ \text{J K}^{-1}\ \text{mol}^{-1}\)

The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is \(-20^\circ C\) the temperature of the surroundings to which it rejects heat is \(11^\circ C\) \(21^\circ C\) \(31^\circ C\) \(41^\circ C\)

The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be \(13.6 \times 10^3\ \text{kg/m}^3\) and g = 10 \(\text{m/s}^2\) then the power (in watt) is 3.0 1.50 1.70 2.35

An automobile moves on a road with a speed of \(54\ \text{km h}^{-1}\). The radius of its wheels is 0.45 m and the moment of inertia of the wheel about its axis of rotation is \(3\ \text{kg m}^2\). If the vehicle is brought to rest in 15 s the magnitude of average torque transmitted by its brakes to the wheel is \(10.86\ \text{kg m}^2\ \text{s}^{-2}\) \(2.86\ \text{kg m}^2\ \text{s}^{-2}\) \(6.66\ \text{kg m}^2\ \text{s}^{-2}\) \(8.58\ \text{kg m}^2\ \text{s}^{-2}\)

Water rises to a height h in capillary tube. If the length of capillary tube above the surface of water is made less than h then water rises upto a point a little below the top and stays there. water does not rise at all. water rises upto the tip of capillary tube and then starts overflowing like a fountain. water rises upto the top of capillary tube and stays there without overflowing.

If Avogadro number \(N_A\) is changed from \(6.022 \times 10^{23}\ \text{mol}^{-1}\) to \(6.022 \times 10^{20}\ \text{mol}^{-1}\) this would change the mass of one mole of carbon the ratio of chemical species to each other in a balanced equation the ratio of elements to each other in a compound the definition of mass in units of grams.

What is the mass of the precipitate formed when 50 mL of 16.9% solution of \(AgNO_3\) is mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8 N = 14 O = 16 Na = 23 Cl = 35.5) 3.5 g 7 g 14 g 28 g

$2,3\text{-Dimethyl-}2\text{-butene}$ can be prepared by heating which of the following compounds with a strong acid?

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (At. wt. of Mg = 24) 96 60 84 75

The number of water molecules is maximum in 1.8 gram of water 18 gram of water 18 moles of water 18 molecules of water

A series R-C circuit is connected to an alternating voltage source. Consider two situations: (a) When capacitor is air filled. (b) When capacitor is mica filled. Current through resistor is I and voltage across capacitor is V then \(i_a > i_b\) \(V_a = V_b\) \(V_a V_b\)

A circuit contains an ammeter a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm the reading in the ammeter will be 2 A 1 A 0.5 A 0.25 A

A photoelectric surface is illuminated successively by monochromatic light of wavelength \(\lambda\) and \(\lambda/2\). If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case the work function of the surface of the material is (h = Planck's constant c = speed of light) \(\frac{hc}{2\lambda}\) \(\frac{2hc}{\lambda}\) \(\frac{hc}{3\lambda}\) \(\frac{hc}{\lambda}\)

A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. \(E_0\) and a resistance \(r_1\). An unknown e.m.f. E is balanced at a length l of the potentiometer wire. The e.m.f. E will be given by \(\frac{LE_0l}{(r+r_1)}\) \(\frac{LE_0r}{lr_1}\) \(\frac{LE_0r}{(r+r_1)l}\) \(\frac{E_0r}{(r+r_1)}\cdot\frac{l}{L}\)

A parallel plate air capacitor has capacity C distance of separation between plates is d and potential difference V is applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is \(\frac{CV^2}{d}\) \(\frac{C^2V^2}{2d^2}\) \(\frac{C^2V^2}{2d}\) \(\frac{CV^2}{2d}\)

Strong reducing behavior of \(H_3PO_2\) is due to high electron gain enthalpy of phosphorus high oxidation state of phosphorus presence of two -OH groups and one P-H bond presence of one -OH group and two P-H bonds.

In the extraction of copper from its sulphide ore the metal is finally obtained by the reduction of cuprous oxide with carbon monoxide copper (I) sulphide sulphur dioxide iron (II) sulphide.

Which of the statements given below is incorrect? \(O_3\) molecule is bent. ONF is isoelectronic with \(O_2N\) \(OF_2\) is an oxides of fluorine. \(Cl_2O_7\) is an anhydride of perchloric acid.

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is hydrazine in presence of feebly acidic solution hydrocyanic acid sodium hydrogen sulphate a Grignard reagent.

Method by which aniline cannot be prepared is degradation of benzamide with bromine in alkaline solution reduction of nitrobenzene with \(H_2\)/Pd in ethanol potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution hydrolysis of phenylisocyanide with acidic solution.