List of practice Questions

The ratio of electric fields on the axis and at equator of an electric dipole will be

A body starts to fall freely under gravity. The distance covered by it in first, second and third second are in ratio

$4\, g$ of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave $5\, g$ of its oxide. The equivalent weight of copper is :

The correct name of the compound $\left[ Cu \left( NH _{3}\right)_{4}\right]\left( NO _{3}\right)_{2}$ according to IUPAC system is

Number of atoms of oxygen present in $10.6\, g$ of $Na _{2} CO _{3}$ will be

The wave theory of light was given by

On increasing the plate separation of a charged condenser, the energy

Volume of $0.1\, M\, K _{2} Cr _{2} O _{7}$ required to oxidize $35\, mL$ of $0.5\, M\, FeSO _{4}$ solution is

Some electric bulbs are connected in series across a $ 220\,V $ supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will be

In junction diode, the holes are because of

Identify the correct sequence of increasing number of a bonds in the structures of the following molecules: I. $ {{H}_{2}}{{S}_{2}}{{O}_{6}} $ II. $ {{H}_{2}}S{{O}_{3}} $ III. $ {{H}_{2}}{{S}_{2}}{{O}_{5}} $

In which of the following, there are 3 bp and 2 lp?

Xenon hexaflouride reacts with silica to form a xenon compound X. The oxidation state of xenon in X is:

Sulphur reacts with chlorine in 1:2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the hybridisation state of central atom in the anion of F?

100 mL of 0.015 M HCl solution is mixed "with 100 mL of 0.005 M HCl. What is the pH of the resultant solution?

An element has 2 electrons in its K-shell, 8 electrons in L-shell, 13 electrons in M-shell and one electron in N-shell. The element is:

Lattice energy of alkali metal chlorides follows the order :

If $(0, 6)$ and $(0, 3)$ are respectively the vertex and focus of a parabola then its equation is

A body x with a momentum p collides with another identical stationary body y one dimensionally. During the collision y gives an impulse J to the body x. Then, the coefficient of restitution is:

At constant pressure, the ratio of increase in volume of an ideal gas per degree rise in kelvin temperature to its original volume is: (T = absolute temperature of the gas)

If a body moving in a circular path has constant speed, then there is no force acting on it. The direction of the velocity vector of a body moving in a circular path is changing.

At $ 0{}^\circ C $ , the densities of a cork and a liquid, in which the cork floats are $ {{S}_{1}} $ and $ {{S}_{2}} $ respectively. The coefficients of expansion of the material of the cork and the liquid are 100r and respectively. If the cork sinks when temperature of the liquid is t $ {}^\circ C $ , then the $ \left( \frac{{{P}_{2}}}{{{P}_{1}}} \right) $ is:

What is the formula of calgon?

The formula of exhausted permutait is:

If $w= \frac {-1+\sqrt {3i}}{2} $ then $(3+w+3w^2)^4 $