List of practice Questions

In the detection of II group acid radical, the salt containing chloride is treated with concentrated sulphuric acid, the colourless gas is liberated. The name of the gas is

Primary structure in a nucleic acid contains bases as G A T G C …..… The chain which is complementary to this chain is

The ratio of the total energy E of the electron to its kinetic energy K in hydrogen atom is

The property of the alkaline earth metals that increases with their atomic number is

10¹⁸ fissions per second is required for producing power of 300 MW in a nuclear power station. To increase the power output to 360 MW the additional number of fissions required per second is

RNA and DNA are chiral molecules, their chirality is due to the presence of

During $ẞ^{-}$ decay of a radioactive element there is an increase in its

If the momentum of an α-particle is half that of a proton, then the ratio between the wavelengths of their de-Broglie waves is

A hydrocarbon A (C₄H₈) on reaction with HCl gives a compound B (C₄H₉Cl) which on reaction with 1 mol of NH₃ gives compound C (C₄H₁₀N). On reacting with NaNO₂ and HCl followed by treatment with water, compound C yields an optically active compound D. The D is

Permanent hardness cannot be removed by

The method by which aniline cannot be prepared is

The product B is

If $θ_p$ is the polarizing angle for a glass plate of refractive index μ and critical angle $θ_c$, then

Which is the most suitable reagent for the following conversion ?

In Young's double-slit experiment, two different light beams of wavelengths $λ_1$ and $λ_2$ produce interference pattern with band widths $β_1$ and $β_2$ respectively. If the ratio between $β_1$ and $β_2$ is 3:2, then the ratio between and is

An object is placed at 10 cm in front of a concave mirror. If the image is at 20 cm from the mirror on the same side of the object, then the magnification produced by the mirror is

The apparent depth of a needle lying in a water beaker is found to be 9 cm. If water is replaced by a liquid of refractive index 1.5, then the apparent depth of needle will be (μ of water is 4/3)

Which of the following is not true for oxidation ?

A and C are

The reagent which can do the conversion CH₃COOH → CH₃ - CH₂ - OH is

A, B and C respectively are

K_a values for acids H₂SO₃, HNO₂, CH₃COOH and HCN are respectively 1.3 × 10^-2, 4 × 10^-4, 1.8 × 10^-5 and 4 × 10^-10, which of the above acids produces stronger conjugate base in aqueous solution ?

In set of reactions, identify D

A compound ‘A’ (C₇H₈O) is insoluble in NaHCO₃ solution but dissolve in NaOH and give a characteristic colour with neutral FeCl₃ solution. When treated with Bromine water compound ‘A’ forms the compound B with the formula C₇H₅OBr₃. ‘A’ is

An organic compound ‘X’ on treatment with PCC in dichloromethane gives the compound Y. Compound ‘Y’ reacts with I₂ and alkali to form yellow precipitate of triiodomethane. The compound X is