List of practice Questions

How do we differentiate between $Fe^{3+}$ and $Cr^{3+}$ in group III ?

The $pH$ of solution containing $0.10\, M$ sodium acetate and $0.03\, M$ acetic acid is $ \left( pK _{a} \text { for } CH _{3} COOH =4.57\right) $

A torque of $30 \,N-m$ is acting on a wheel of mass $5 \,kg$ and moment of inertia $2\, kg-m2$. If wheel starts rotating from rest then, its angular displacement in $10 $ seconds will be:

A body projected with an initial velocity horizontally has kinetic energy K. If it is projected at an angle $ 45{}^\circ $ the initial kinetic energy will be:

Geometrical isomerism is not shown by :

Which of the following is a redox reaction?

Best material for the study of mitosis in laboratory is:

An observer can see through a pin-hole the top end of a thin rod of height A, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is

Brilliance of diamond is due to

The green house effect is caused by :

Compressibility factor for $1$ mole of a van der Waals' gas at $0^{\circ} C$ and $100$ atmospheric pressure is found to be $0.5$ the volume of gas molecules is :

To which block of the periodic table does element with atomic number 56 belong

Thermite is a mixture of iron oxide and

The most stable complex among the following is

The figure shows a system consisting of (i) a ring of outer radius 3R rolling clockwise without slipping on a horizontal surface with angular speed $?$ and (ii) an inner disc of radius 2R rotating anti-clockwise with angular speed $?/2$. The ring and disc are separated by frictionless ball bearings. The system is in the x-z plane. The point P on the inner disc is at a distance R from the origin, where OP makes an angle of 30$^{\circ}$ with the horizontal. Then with respect to the horizontal surface,

For paramagnetic materials magnetic susceptibility is related with temperature as:

Study of ant is called:

Smallest bacteria is

Root pressure is maximum when:

Ribosomes are produced in:

One end of massless rope, which passes over a massless and frictionless pulley $P$ is tied to a hook while the other is free. Maximum tension the rope bear is $360 \,N$. With what value of maximum safe acceleration (in $ms ^{-2}$ ) can a man of $60\, kg$ climb on the rope ?

Minimum deviation is observed with a prism having angle of prism A, angle of deviation $ \delta , $ angle of incident $ i $ and angle of emergence e, then we have generally:

Methyl orange is the example of which type of dye?