List of practice Questions

Intensity of gravitational field inside the hollow spherical shell is

Neutron changing into Proton by emiting electron and anti neutrino this due to

Attractive Force is exists between two protons inside the Nucleons this is due to

Repulsive force exist between two protons but side the nucleons this due to

Out of the following interactions the weakest is

A hollow spherical shell is compressed to half its radius. The gravitational potential at the centre

Gas equation PV = nRT is obeyed by

A fruity smell is obtained by the reaction of ethanol with

Carbon atoms in benzene molecule are inclined at an angle of.

Which of the following has the highest nucleophilicity?

Which of the following, has the most acidic hydrogen?

Two radioactive materials $X_1$ and $X_2$ have decay constants $10\lambda$ and $\lambda$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of $X_1$ to that of $X_2$ will be 1/e after a time

Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane of the paper as shown. The variation of the magnetic field B along the line XX' is given by

The order of reactivities of the following alkyl halides for a $S_N$2 reaction is-

The incentre of the triangle with vertices $(1, \sqrt{3}), (0,0)$ and $ (2,0) is $

The compressibility of a gas is less than unity at STP. Therefore,

Starting with the same initial conditions, an ideal gas expands from volume V$_1$ to V$_2$ in three different ways, the work done by the gas is W$_1$ if the process is purely isothermal, W$_2$ if purely isobaric and W$_3$ if purely adiabatic, then

Propyne and propene can be distinguished by

In a compound microscope, the intermediate image is

For the equilibrium,${ MgCO_3(s) <=>[\triangle] MgO(s)+CO_2 (g)} $ which of the following expressions is correct ?

Benzoyl chloride is prepared from benzoic acid by

At 100$^\circ$C and 1 atm. if the density of liquid water is 1.0 g $cm^{-3}$ and that of water vapour is 0.0006 g $cm^{-3}$, then the volume occupied by water molecules in 1 litre of steam at that temperature

An ionized gas contains both positive and negative ions. If it is subjected simultaneously to an electric field along the + x-direction and a magnetic field along the +z-direction, then

An infinitely long conductor PQR is bent to form a right angle as shown in figure. A current I flows through PQR. The magnetic field due to this current at the point M is $H_1$. Now, another infinitely long straight conductor QS is connected at Q, so that current is I/2 in QR as well as in QS, the current in PQ remaining unchanged. The magnetic field at M is now $H_2.$ The ratio $H_1 /H_2$ is given by

Amongst the following, identify the species with an atom in + 6 oxidation state