List of practice Questions

Out of dia, para and ferromagnetism, the universal property of all substances is

The tenth element in the periodic table resembles the element with atomic number

Direct nitration of aniline is not a feasible process because

The ground state energy of hydrogen atom is –13.6 eV. What are the kinetic and potential energies of the electron in this state?

Find the areas of the squares whose sides are : (a) 10 cm (b) 14 cm (c) 5 m.

Find the areas of the rectangles whose sides are : (a) 3 cm and 4 cm (b) 12 m and 21 m (c) 2 km and 3 km (d) 2 m and 70 cm

Find $x$ from the equation $cosec\left(90^{\circ}+\theta\right)+x\,cos\theta\,cot\left(90^{\circ}+\theta\right)=sin\left(90^{\circ}+\theta\right)$.

A taxon with reference to classification of living organisms can be defined as

If $ {{a}_{1}},{{a}_{2}},.....,{{a}_{n}} $ are in AP with common difference $ d\ne 0, $ then $ (\sin d) $ $ [\sec {{a}_{1}}\sec {{a}_{2}}+ $ $ \sec {{a}_{2}}\sec {{a}_{3}}+...+\sec {{a}_{n-1}}\sec {{a}_{n}}] $ is equal to

$\displaystyle \int^{\sqrt{\pi}/2}_0$ $2x^{3} sin\left(x^{2}\right) dx =$dx is equal to

The correct order of ease of cleavage of ether linkage by hydrogen halide follows

Which one of the following amines forms a non-acidic and alkali insoluble product with p-toluenesulphonyl chloride?

The ratio of hydraulic stress to the corresponding strain is known as

Consider the following statements concerning $N_2H_4$ 1. It is an exothermic compound 2. It burns in air with the evolution of heat 3. It has kinetic stability 4. In reduces $Fe^{3+}$ to $Fe^{2+}$ in acidic medium Which of the following combination is correct?

Match the following correctly

For a first order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 20 min. The time required to reduce initial concentration by a factor of 1/16 is

A galvanometer has 30 divisions and a sensitivity $ 16 \mu A/div $ . It can be converted into a voltmeter to read 3 V by connecting

An $LCR$ series circuit is at resonance. Then

Consider a circular loop of radius R on the xy-plane carrying a steady current anticlockwise. The magnetic field at the center of the loop is given by

An astronaut experiences weightlessness in a space satellite. It is because

Arrange the following ions in the order of decreasing X-0 bond length, where X is the central atom in $SiO_4^{4-},ClO_4^- ,PO_4^{3-},SO_4^{2-}$

Detergents are known to pollute rivers and waterways. However, detergents can be made biodegradable and pollution free by taking

A simple harmonic motion is represented by $x(t) = \sin^2 \omega t - 2 \, \cos^2 \, \omega t$ . The angular frequency of oscillation is given by

A vessel of depth $x$ is half filled with oil of refractive index $ {{\mu }_{1}} $ and the other half is filled with water of refractive index $ {{\mu }_{2}} $ The apparent depth of the vessel when viewed from above is