List of practice Questions

A diverging lens with magnitude of focal length $25\, cm$ is placed at a distance of $15\, cm$ from a converging lens of magnitude of focal length $20\, cm$. A beam of parallel light falls on the diverging lens. The final image formed is :

An electric dipole has a fixed dipole moment $\vec{p}$, which makes angles $\theta$ with respect to x-axis. When subjected to an electric field $\vec{E}_1 = E \hat{i}$, it experiences a torque $\vec{T}_1 = \tau \hat{k}$. When subjected to another electric field $\vec{E}_2 = \sqrt{3 E_1} \hat{j}$ it experiences a torque $\vec{T}_2 = - \vec{T}_1$. The angle $\theta$ is

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is :

A bicycle wheel rolls without slipping on a horizontal floor. Which one of the following is true about the motion of points on the rim of the wheel, relative to the axis at the wheel's centre?

The sum value of the series $ \frac{3}{4} +\frac{5}{36} +\frac{7}{144} +\frac{9}{400} + ...\infty $ is

The normality of 10% (w/v) of acetic acid is

Radii of two conducting circular loops are b and a respectively where b > > a. Centers of both loops coincide but planes of both loops are perpendicular to each other. The value of mutual inductance for these loops

A big water drop is formed by the combination of ?n? small water drops of equal radii. The ratio of the surface energy of ?n' drops to the surface energy of big drop is

$2^{1/4}. 2^{2/8}. 2^{3/16}. 2^{4/32}......\infty$ is equal to-

The correct order of basic strength of the following are

In the reaction,

In the given reaction (B) is

Polymer formation from monomers starts by

Which of the following coordination compounds would exhibit optical isomerism ?

On hydrolysis of starch, we finally get

Which of the following sodium compound/compound(s) are formed when an organic compound containing both nitrogen and sulphur is fused with sodium ?

The velocity of a particle executing a simple harmonic motion is $13\, ms^{-1}$, when its distance from the equilibrium position (Q) is 3 m and its velocity is $12 \, ms^{-1}$, when it is 5 m away from The frequency of the simple harmonic motion is

Which colour of light is most effective for photo synthesis?

Among the following, correct statement is :

A gene whose expression helps to identify transformed cell is known as :

Which statements is wrong for Krebs' cycle ?

The pivot joint between atlas and axis is a type of :

Which of the following is dependent on temperature?

During DNA replication, Okazaki fragments are used to elongate:

The morphological nature of the edible part of coconut is:

Two point charges $A = +3\, nC$ and $B = +1\, nC$ are placed $5\,cm$ apart in air. The work done to move charge $B$ towards $A$ by $1\,cm$ is