AIPMT 2014

Reason of lanthanoid contraction is

When 0.1 mol MnO\(_4^{2 - }\) is oxidised the quantity of electricity required to completely oxidise MnO\(_4^{2 - }\) to MnO\(_4^ -\) is

The weight of silver (at. wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O2 at STP will be

Which one of the following is not a common component of Photochemical smog?

Which of the following compounds will undergo racemisation when solution of KOH hydrolyses?

Which of the following organic compounds has same hybridization as its combustion product (CO2)?

Identify Z in the sequence of reactions :

What products are formed when the following compound is treated with Br2 in the presence of FeBr3?

Which of the following salts will give highest pH in water?

Which of the following will be most stable diazonium salt RN2+X\(-\)?

In the following reaction, the product (A) is

Acidity of diprotic acids in aqueous solutions increases in the order

Which of the following orders of ionic radii is correctly represented ?

Which of the following organic compounds polymerizes to form the polyester dacron?

Which one of the following is an example of thermosetting polymer?

In acidic medium, H2O2 changes Cr2O72- to CrO5 which has two (\(-\)O\(-\)O\(-\)) bonds. Oxidation state of Cr in CrO5 is

(I)   H2O2 + O3 \(\to\) H2O + 2O2
(II)   H2O2 + Ag2O \(\to\) 2Ag + H2O + O2
Role of Hydrogen peroxide in the above reactions is respectvely

The pair of compounds that can exist together is

If \(a\) is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be

Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?

When 22.4 liters of H2(g) is mixed with 11.2 litres of Cl2(g), each at S.T.P. the moles of HCl(g) formed is equal to

Equal masses of H2, O2 and methane have been taken in a container of volume V at temperature 27oC in identical conditions. The ratio of the volumes of gases H2 : O2 : methane would be

1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel, Which reactant is left in excess and how much ? (At. wt. Mg = 24, O = 16)

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H2SO4. The percentage of nitrogen in the soil is

What is the maximum number of orbitals that can be identified with the following quantum numbers ?
n = 3, l = 1, m1 = 0

Calculate the energy in joule corresponding to light of wavelength 45 nm. (Planck,s constant, h = 6.63 \(\times\) 10\(-\)34 J s, speed of light, c = 3 \(\times\) 108 m s\(-\)1)

Be2+ is isoelectronic with which of the following ions ?

Which property of colloids is not dependent on the charge on colloidal particles?

For the reaction, \({X_2}{O_{4\left( l \right)}}\,\, \to \,\,2X{O_{2(g)}}\)
\(\Delta\)U = 2.1 kcal, \(\Delta\)S = 20 cal K\(-\)1 at 300 K
Hence, G is

Which of the following statements is correct for the spontaneous adsorption of a gas?

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are

A radioactive X with a half life 1.4 \(\times\) 109 years decays to Y which is stable. A sample of the rock from a cave was found to contain X and Y in the ratio 1 : 7. The age of the rock is

Hydrogen atom in ground state is excited by a monochromatic radiation of \(\lambda\) = 975 \(\mathop A\limits^ \circ\). Number of spectral lines in the resulting spectrum emitted will be

The binding energy per nucleon of and nuclei are 5.60 MeV and 7.06 MeV respectively. In the nuclear reaction
\({}_3^7Li + {}_1^1H \to {}_2^4He + _2^4He + Q\)
the value of energy Q released is

Two thin dielectric slabs of dielectric constants K1 and K2(K1 < K2) are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field E between the plates with distance d as measured from pl...

A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total kinetic energy generated due to explosion is :

The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is :

The resistances in the two arms of the meter bridge are 5 \(\Omega\) and R\(\Omega\) respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6\(l\)1. The resistance R is

A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 ...

Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5 \(\Omega\). The power loss in the wire is

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de Broglie wavelength of the particle is

When the energy of the incident radiation is increased nby 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is

A thin semicircular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B, as shown in the figure.

The potential difference developed across the ring when its speed is \(v\), is

Light with an energy flux of 25 \(\times\) 104 W m\(-\)2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm2, the average force exerted on the surface is

In a region, the potential is represented by V(x, y, z) = 6x \(-\) 8xy \(-\) 8y + 6yz,   where \(V\) is in volts and x, y, z are in metres. The electric force experienced by a charge of 2 coulomb situated at point (1, 1, 1) is

A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere rrespectively are

If the focal length of objective lens is increased then magnifying power of

The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2 A on the first surface returns back through the same path after suffering reflection at the silvered surface.
The refracti...

A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 \(\times\) 1024 kg) have to be compressed to be a black hole?

Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by