List of practice Questions

World Ozone Day is celebrated on

A ray of light is incident normally on a glass slab of thickness $5\, cm$ and refractive index 1.6. The time taken to travel by a ray from source to surface of slab is same as to travel through glass slab. The distance of source from the surface is

Plants having little or no secondary growth are

In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels ?

Considering Ellingham diagram, which of the following metals can be used to reduce alumina ?

The power radiated by a black body is $P$ and it radiates maximum energy at wavelength, $\lambda_0$. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength $\frac{3}{4} \lambda_0$ , the power radiated by it becomes $nP$. The value of $n$ is

Biopatent is granted for biological entities by _______ authority of a country.

"Pusa Sadabahar" is resistant to _______ disease.

Carbon monoxide combines with haemoglobin to form __________

In ovary, estrogen is secreted by ________

The net gain of ATP molecules during aerobic breakdown of one glucose molecule is __________

Winged pollen grains are present in

If $A = \begin{bmatrix}1&2&3\\ -1&1&2\\ 1&2&4\end{bmatrix} $ then $\left(A^{2} - 5A\right)A^{-1} = $

An oscillator of mass $M$ is at rest in its equilibrium position in a potential $V = \frac{1}{2} k(x - X)^2$. A particle of mass $m$ comes from right with speed u and collides completely inelastically with $M$ and sticks to it. This process repeats every time the oscillator crosses its equilibrium position. The amplitude of oscillations after $13$ collisions is : $(M=10, m=5, u=1, k=1)$

The refractive index of the material of a prism is $\sqrt{2}$ and the angle of the prism is $30^{\circ}$. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is

Relative stabilities of the following carbocations will be in the order

In which case is the number of molecules of water maximum ?

Above diagram represents :

Choose the figure from the given answer figures that will complete the pattern of the given problem figure.
Problem Figure 

Answer Figure 

What comes in place of question mark (?) in the series given below? P3C, R5F, T81, V12L, ?

Find the missing number in the following figure.

There are 25 boys in a horizontal row. Rahul was shifted by three places towards his right side and he occupies the middle position in the row. What was his original position from the left end of the row?

Pointing to a man in a photograph, a woman said, "His brother's father is the only son of my grandfather". How is the woman related to the man in the photograph?

Five villages P, Q. R, S and T situated close to each other. P is to the West of Q, R is to the South of P, T is to the North of Q and S is to the East of T. Then, in which direction R is with respect to S?

If the day after tomorrow is a Sunday, what was it day before yesterday?