List of practice Questions

Which species of Pinus produces "Chilgoza" ?

Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is

Equivalent and molecular masses are same in

12 g of Mg with excess of HCI at NTP gives

The molality of a urea solution in which 0.0100 g of urea, $[(NH_2)_2CO]$ is added to 0.3000 $dm^3$ of water at STP is:

What is the equivalent weight of $SnCl _{2}$ in the following reaction, $SnCl _{2}+C l_{2} \rightarrow S n C l_{4} ?$

The unit of physical quantity obtained integral of electric field is

Charge $q_2$ of mass m revolves around a stationary charge $q_1$ in a circular orbit of radius r. The orbital periodic time of $ q_2 $ would be

There exists an electric field of 1 N/C along $Y$ direction. The flux passing through the square of 1 m placed in $XY$ plane inside the electric field is

A spherical conducting shell of inner radius $r_{1}$ and outer radius $r_{2}$ has a charge $Q$. A charge $-q$ is placed at the centre of the shell. The surface charge density on the inner and outer surfaces of the shell will be

Among the following, the correct graphical representation of electric intensity as a function of distance from the centre of a uniformly charged conducting sphere is shown in

An electron c penetrates through a thin plate A and enters the electric field region between parallel plates A and B. It gets slowed down Three other particles-proton (p), alpha particles $(\alpha)$ and beta particles $(\beta^-)$ - similarly penetrate through either plate A or plate B as shown. The correct statement as regards the speed of the particles is

Gauss's law can't be used to calculate electric field near an electric dipole. Electric dipole don't have symmetrical charge distribution.

The total electric flux emanating from a closed surface enclosing an $\alpha$-particle (e = electronic charge) is

If the roots of the equation $x^2 + ax + b = 0$ are $c$ and $d$, then one of the roots of the equation $x^{2}+\left(2c+a\right)x+c^{2}+ac+b=0$ is

What is the time (in sec) required for depositing all the silver present in $125\, mL$ of $1\, M \, AgNO _{3}$ solution by passing a current of $241.25 \, A$? ($IF = 96500$ coulombs)

A small drop of mercury is spherical but bigger drops are oval in shape. surface tension of liquid decreases with increase in temperature.

The unit of surface tension is

$Mg ^{2+}$ is isoelectronic with

Which one of the following species is diamagnetic in nature?

The number of values of k for which the linear equations $4x + ky + 2z = 0$ , $kx + 4y + z = 0$ and $2x + 2y + z = 0$ possess a non-zero solution is

In the given network, the value of $C$, so that an equivalent capacitance between $A$ and $B$ is $3\mu F$, is

Charges $5 \mu C$ and $10 \mu C$ are placed 1 m apart. Work done to bring these charges at a distance 0.5 m from each other is $(k = 9\times 10^9 SI)$

A hollow metal sphere of radius 10 cm is charged such that the potential on its surface becomes 80 V. The potential at the centre of the sphere is

A $600 \,pF$ capacitor is charged by $200 \,V$ supply. It is then disconnected from the supply and is connected to another $300 \,pF$ capacitor. The electrostatic energy lost in the process is