List of practice Questions

Forthcoming generation are less adaptive than the parental generation due to

What is true for archaebacteria

A particle is projected making an angle of 45$^{\circ}$ with horizontal having kinetic energy K. The kinetic energy at highest point will be

Two springs A and B having spring constant K$_A$ and K$_B$ (K$_A$ = 2K$_B$) are stretched by applying force of equal magnitude. If energy stored in spring A is E$_A$ then energy stored in B will be

A projectile is moving at $20\,m\,s^{-1}$ at its highest point, where it breaks into two equal parts due to an internal explosion. One part moves vertically up at $30\,m\,s^{-1}$ with respect to the ground. Then the other part will move at

ABCD is a square loop made of an uniform conducting wire. The current enters the loop at A and leaves at D. The magnetic field is

The unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with

For certain first order reaction m, 75% of the reaction complete in 30 min. How much time it require to complete 99.9% of the reaction?

A ray of light passes through four transparent media with refractive indices $\mu_1,\mu_2,\mu_3$ and $\mu_4$ as shown in the figure. The surfaces of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have

In a Young's double slit experiment, 12 fringes are observed to be formed in a certain segment of the screen when light of wavelength 600 nm is used. If the wavelength of light is changed to 400 nm, number of fringes observed in the same segment of the screen is given by

Ratio of kinetic energy and rotational energy in the motion of a disc is:

Hormone responsible for senescence 

When we migrate from dark to light, we fail to see for sometimes but after a time visibility becomes normal. It is example of

Which one correctly matched

Sp. vol. of cylinderical virus particle is 6.02 × 10^-2 cc/gm. Whose radius and length are 7 Å & 10Å respectively. If NA = 6.02 × 10^23. Find mol. wt. of virus

Which of following give positive Fehling solution test

Optical fibre are based on

If |A →+ B→| = |A→|= |B→| then angle between A and B will be

A ray of light travelling in air haves wavelength λ, frequency n, velocity v and intensity I. If this ray enters into water then these parameter are λ', n' , v' and I' respectively. Which relation is correct

A disc is placed on a surface of pond which has refractive index 5/3.A source of light is placed 4 m below the surface of liquid. The minimum radius of disc will be so light is not coming out

The total energy of particle performing SHM depend on

If $\overrightarrow{a}, \overrightarrow{b}$ and $ \overrightarrow{c}$ are unit vectors, then $|\overrightarrow{a}-\overrightarrow{b} |^2+| \overrightarrow{b}-\overrightarrow{c}|^2+| \overrightarrow{c}-\overrightarrow{a}|^2$ does not exceed

Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be

If $f (x) = xe^{x(1-x)}$ , then f (x) is