List of practice Questions

Some of the reactions and their equilibrium constants K_c are given. Choose the reaction which proceeds rarely at the given temperature.

Which one of the following is the correct relation between C_p and C_v for one mole of an ideal gas? (R is molar gas constant)

The standard enthalpy of formation of CH₄(g), CO₂(g) and H₂O(I) are -75 kJ mol^-1, -393 kJ mol^-1 and -286 kJ mol^-1 respectively. The amount of heat liberated (in kJ) when 3.2g of methane gas is burnt under standard conditions is

A metal 'X' crystallizes in a body-centered cubic structure and its metallic radius is 346.4 pm. The length (in pm) of the unit cell is

The dipole-dipole interaction energy between rotation polar molecules is proportional to___, where 'r' is the distance between polar molecules.

Which one of the following reactions involves change from sp² to sp³ hybridisation of the central atom?

Which one of the following molecules contains an incomplete octet of the central atom?

A fast moving particle of mass 6.63×10^-28g can be located with an accuracy of 1A. The uncertainty in its velocity (in ms^-1) is about (h=6.63×10^-34 Js)

From the following, choose the correct structures of chloroxylenol and terpineol, which are the constituents of "Dettol"

A particle of mass 6.6×10^-31kg is moving with a velocity of 1×10⁷ms^-1. The de Broglie wavelength (in A) associated with the particle, is (h=6.6×10^-34 Js)

A di-negative ion of the element X consists of 10 electrons and 8 neutrons. A dipositive ion of the element Y consists of 12 protons. The number of neutrons in Y is 1.5 times the number of electrons in atom X. Then the mass numbers of X and Y would be in the ratio

Among the following pairs of compounds, the one that does not illustrate the law of multiple proportions, is

Which one of the following contains the highest number of oxygen atoms?

In communication systems, the device used to convert energy from one form to another form is

The minimum length of the dipole antenna for a carrier wave frequency of 200 MHz is nearly

Logic gates are given the inputs A = 0 and B = 1 in case (a) and A = 1 and B = 0 in case (b). The gates giving output of y=1 for both the cases are

When light falls on a solar cell, the generation of emf happens due to

The special purpose diode operated / working under forward bias is / are

In a nuclear reactor, the ratio of number of fission produced by a given generation of neutrons to the number of fission of the preceding generation is known as

In Bohr atom model, the total energy of the electron in hydrogen atom is -3.4eV. Then its angular momentum about the nucleus of the atom is (h=Planck's constant)

The INCORRECT statement is

The energy equivalent of 5 g of a substance is

The material that is not photo sensitive to visible light is

The momenta of a proton, a neutron and an electron are in the ratio 3:2:1, then their respective de Broglie wavelengths are in the ratio

Two rays of light A and B are falling on a glass slab at the angles of incidence 45° and 60°. if the reflected ray of A is partially polarized and that of B is completely polarized, then the refractive index of glass is