List of practice Questions

Cockroaches can climb smooth or steep surfaces due to the presence of adhesive pads found on the tarsus of their legs. They are called __________

The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of ${CO_2}$ is bubbled through aqueous solution of B, C is formed which is recovered in the solid form. Solid C on gentle heating gives back A. The compound A is -

A square surface of side $L$ meter in the plane of the paper is placed in a uniform electric field $E(volt/m)$ acting along the same plane at an angle $q$ with the horizontal side of the square as shown in figure. The electric flux linked to the surface, in units of volt $m$ is

Methyl bromide reacts with $AgF$ to give methyl fluoride and silver bromide. This reaction is called

A gas is considered ideal at

The heat capacity per mole of water is ($R$ is universal gas constant)

A particle is thrown vertically up with a certain velocity. Assuming the air resistance to be negligible, which one of the following represents the velocity (along $y$-axis) time (along $x$-axis) graph for the entire motion of the particle till it reaches back to the ground

Assuming that the earth is a sphere of radius $R_{E}$ with uniform density, the distance from its centre at which the acceleration due to gravity is equal to $ \frac{g}{3} $ ($g$ = the acceleration due to gravity on the surface of earth) is

The foot of the perpendicular drawn from the origin to a plane is $ (1,-1,5) $ . The equation of the plane is

The centroid of the triangle formed by joining the mid points of the sides of a triangle with vertices $ (-1,-1),(2,4) $ and $ (-5,-6) $ is

If $300\,mL$ of a gas weighs $0.368\, g$ at $STP$. What is its molecular weight?

If $ A+B+C=\pi , $ then $ \tan \frac{A}{2}\tan \frac{B}{2}+\tan \frac{B}{2}\tan \frac{C}{2}+\tan \frac{C}{2}+\tan \frac{C}{2}\tan \frac{A}{2} $ is equal to

In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the

The charge on $Fe(OH)_3$ sol is due to

IUPAC name of the compound

In the extraction of copper, the copper matte is a mixture of

Reaction between propene and $HCl$ to form iso-propyl chloride takes place through

The equation of the plane containing the lines $ \frac{x-1}{2}=\frac{y+1}{-1}=\frac{z}{3} $ and $ \frac{x}{2}=\frac{y-2}{-1}=\frac{z+1}{3} $ is

What is the maximum number of emission lines obtained when the excited electron of a hydrogen atom in $ n=5 $ drops to the ground state?

$ {{N}_{2}} $ and $ {{O}_{2}} $ are converted to monopositive cations $ N_{2}^{+} $ and $ O_{2}^{+} $ respectively. Which is incorrect?

$n$ identical drops, each of capacitance $C$ and charged to a potential $V$, coalesce to form a bigger drop. Then the ratio of the energy stored in the big drop to that in each small drop is

The relation between the time of flight of projectile $T_f$ and the time to reach the maximum height $t_m$ is

One Faraday of electricity is passed through molten $Al_2O_3$ aqueous solution of $CuSO_4$ and molten $NaCl$ taken in three different electrolytic cells connected in series. The mole ratio of $Al,Cu$ and $Na$ deposited at the respective cathode is

An object is projected so that its horizontal range $R$ is maximum. If the maximum height attained by the object is $H$, then the ratio of $R/H$ is

An object placed on an inclined plane starts sliding when the angle of incline becomes $30^{\circ}$. The coefficient of static friction between the object and the plane is