List of practice Questions

Which cell organelle is present in both prokaryotic and eukaryotic cell?

Two vectors have magnitudes 3 and 5. If angle between them is 60$^{\circ}$, then the dot product of two vectors will be

The volume of a metal sphere increases by $ \text{0}\text{.15 }\!\!%\!\!\text{ } $ when its temperature is raised by $ \text{24}{{\,}^{\text{o}}}\text{C}\text{.} $ The coefficient of linear expansion of metal is:

The relative permeability of iron is $6000$. Its magnetic susceptibility is

As shown in figure, a planet revolves in elliptical orbit around the sun. Where is KE of the planet maximum?

The period of SHM of a particle is 12 s. The phase difference between the positions at $ t=3\,s $ and $ t=4s $ will be:

A triode valve has an amplification factor of 20 and its plate is given a potential of 300 V. The grid-voltage to reduce the plate current to zero, is :

In an ideal parallel LC circuit, the capacitor is charged by connecting it to a DC source which is then disconnected. -The current in the circuit:

For a satellite moving in an orbit around the earth, the ratio of kinetic to potential energy is:

Hyposecretion of growth hormone causes:

Human urine as compared to human blood is:

Which cell organelle is absent in human sperm?

Cell wall of a cell is removed, the remaining is called

$ HCl $ is secreted by which of the following cell of stomach?

A wire elongates by $ l \,mm$ when a load w is hanged from it. If the wire goes over a pulley and two weights w each are hung at the two ends, the elongation of the wire will be (in mm):

A body of mass $M$ moves with velocity $v$ and collides elastically with another body of mass $m$ $(M \gg>m)$ at rest, then the velocity of body of mass $m$ is :

If torque is zero then:

A solid sphere, a hollow sphere and a disc having same mass and radius roll down the same inclined plane from rest. Which one will reach the ground in least time?

If two soap bubbles of different radii are connected by a tube:

If the momentum of body is increased by $100\%$, then the percentage increase in the kinetic energy will be:

A body is moving along a rough horizontal surface with an initial velocity $6 \,m/s$. If the body comes to rest after travelling a distance $9 \,m$, then the coefficient of sliding friction will be:

A plano-convex lens of refractive index $1.5$ and radius of curvature $30 \,cm $ is silvered at the curved surface. Now, this lens has been used to form the image of an object. At what distance from this lens, an object be placed in order to have a real image of the size of the object?

At the height $80\, m$, an aeroplane is moved with $150\, m / s . A$ bomb is dropped from it, so as to hit a target. At what distance from the target should the bomb be dropped ? $\left(g=10\, m / s ^{2}\right)$

Arrange the following as increase in oxidation number : (i) $Mn ^{2+}$ (ii) $MnO _{2}$ (iii) $KMnO _{4}$ (iv) $K _{2} MnO _{4}$