List of practice Questions

The exchange of gases in the alveoli of the lungs takes place by

Lines of force, due to earth?? horizontal magnetic field, are

Let $f(x) = x - [x] $, for every real number x, where [x] is the integral part of x Then, $ \int^1_{-1} \, f ( x ) \, dx$ is

The richest source of vitamin A are:

The value of $\displaystyle \sum_{k=1}^6 \bigg(\sin\frac{2\pi k}{7}-i \cos \frac{2\pi k}{7}\bigg)$ is

�Mirage� is a phenomenone due to

The contraction of gall bladder is due to

Highly pure dilute solution of sodium in liquid ammonia

In Youngs double slit experiment, the central fringe of interference pattern produced by light of wavelength $ 6000\,\overset{\text{o}}{\mathop{\text{A}}}\, $ shifts to the position of the 5th bright fringe on introducing a thin glass plate of refractive index of 1.50 in front of one of the slits. The thickness of the plate would be:

Kirchhoff's voltage law is based on the law of conservation of

What is the current (I) in the circuit, as shown in figure

The freezing point of a solution prepared from 1.25 g of non-electrolyte and 20 g of water is 271.9K. If molar depression constant is 1 86 $K m^{-1}$ then molar mass of the solute will be

The solubility of $BaSO_4$ in water is $2.33 \times 10^{-3}$ gram/litre. Its solubility product will be (molecular weight of $BaSO_4 = 233$)

Which of the following has highest boiling point?

Which of the following salt has the same value of vant?s Hoff factor as that of $K _{3}\left[ Fe ( CN )_{6}\right]$ ?

A particle of mass m is executing oscillation about the origin on the x-axis. Its potential energy is $ U (x) = k [ x ]^ 3,$ where k is a positive constant. If the amplitude of oscillation is a, then its time period T is

If a simple pendulum oscillates with an amplitude of $50\, mm$ and time period of $2\, sec$, then its maximum velocity, is

If the metal bob of a simple pendulum is replaced by a wooden bob, then its time period will

One-third of spring having force constant k is cut and mass m is suspended to it. If the frequency of oscillation of the original spring with the same mass is/then the frequency of oscillation in one-third of spring is

A first order reaction, which is $30\%$ complete in $30$ minutes has a half-life period of

For the first order reaction,

For the reaction A$\to$ B, the rate law expression is rate = k [A], Which of the following statements is incorrect ?

The rate constant of reaction is $0.69 \times 10^{-2} min ^{-1}$ and the initial concentration is $0.2\, mol L ^{-1}$. The half-life period is

The rate of diffusion, is