List of practice Questions

Phenol is treated with bromine water and shaken well to get white precipitate. The white precipitate is

The magnetic fields at two points on the axis of a circular coil at distance of 0.05 m and 0.2 m from the centre are in the ratio 8 :1 . The radius of the coil is

Characteristics character of human cornea

If the energy of a hydrogen atom in nth orbit is $E_n$, then energy in the nth orbit of a singly ionized helium atom will be

A point source of light is placed 4 m below the surface of water of refractive index is 5/3. The minimum diameter of a disc which should be placed over the source on the surface of water to cut-off all light coming out of water is:

Vapour density of a metal chloride is 47.5. If the valency of metal is 2, the metal is:

For the reaction, $2N_{2}O_{5} \to 4NO_{2} + O_{2}$ rate and rate constant are $1.02 \times 10^{-4}\,mol\, L^{-1} s^{-1}$ and $3.4 \times 10^{-5} s^{-1}$ respectively. The concentration of $N_{2}O_{5}$ in mol $L^{-1}$ will be

A cylindrical rod having temperature T1 and T2 at its end. The rate of flow of heat Q1 cal/sec. If all the linear dimension are doubled keeping temperature remain const. then rate of flow of heat Q2 will be

Which of the following is correct about $H$-bonding in $DNA$?

Correct order of 1st ionisation potential (IP) among following elements Be, B, C, N, O is

Which one of the following gives positive Fehling's solution test?

Intermediates formed during reaction of RCNH2||O with Br2 and KOH are

Which of the following is closest relative of man

Two waves having equation $x_1=a \sin(\omega t-kx+\phi_1),$ $ x_2=a \sin (\omega t-kx +\phi_2)$ If in the resultant wave the frequency and amplitude remain equal to amplitude of superimposing waves, the phase difference between them is

Energy is released in nuclear fission is due to

X(n, α) 7/3Li , then X will be

Biological importance of ozone layer is

A dipole of dipole moment $ \overrightarrow{ p} $ is placed in uniform electric field $ \overrightarrow{ E}$ then torque acting on it is given by

The incorrect IUPAC name is

In steam distillation of toluene, the pressure of toluene in vapour is

The atomic number (Z) of an element is 25. In its ground state, how many electrons are present in the 'N' shell ?

Types of RNA polymerase required in nucleus for RNA synthesis

Reason of lung cancer

Salmonella is related with

Which of the most infectious disease is