List of practice Questions

The diagram given below represents a section of small intestinal mucosa. Identify $A, B$ and $C$
The dialysis of colloidal solution depends upon
The diameter of $16x^2 - 9y^2 = 144$ which is conjugate to $x = 2y $ is
The diameter of colloidal particles range from :
The detergent action of soap is due to its
The development of Periplaneta americana is
The device which produces highly coherent sources is
The diagonal of a square is changing at the rate of $0.5\, cm/ sec$. Then the rate of change of area, when the area is $400\, cm^2$, is equal to
The derivative of $cosec^{-1} \left(\frac{1}{2x\sqrt{1-x^{2}}}\right) w.r.t \sqrt{1-x^{2}}$ is
The derivative of $\sin^{-1} x $ w.r.t $\cos^{- 1} \sqrt{1-x^{2}} $ is
The derivative of $\sin \, x^3 $ w.r.t. $\cos \, x^3$ is equal to
The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by a chemical reaction from a compound of nitrogen due to the presence of the following in aerial nitrogen
The density of water at the surface of the ocean is $\rho$ and atmospheric pressure is $p _{0}$. If the bulk modulus of water is $K$, what is the density of ocean water at a depth where the pressure is $n p_{0}$ ?
The depression of freezing point is directly proportional to
The derivative of an even function is always
The density of a metal which crystallises in $bcc$ lattice with unit cell edge length $300\,pm$ and molar mass $50 \,g \,mol^{-1}$ will be
The density of air at N.T.P. is 1.293 gm/lit. If the pressure is tripled keeping its temperature constant its density becomes
The density of core of a planet is $\rho_1$ and that of the outer shell is $\rho_2$. The radii of core and that of the planet are $R$ and $2R$ respectively. Gravitational acceleration at the surface of planet is same as at a depth. The ratio between $\frac{\rho _{1}}{\rho _{2}}$ is
The density of neon will be highest at
The deficiency of this micro nutrient results in ??ittle leaf?
The definition of current gain is given by
The density of a cube is measured by measuring its mass and the length of its side. If the maximum errors in the measurement of mass and length are $4\%$ and $3\%$, respectively, then the maximum error in the measurement of the density is
The de Broglie Wavelength of a molecule of thermal energy KT (K is Boltzmann constant. and T is absolute temperature) is given by
The de Broglie wavelength of a photon is twice the de Broglie wavelength of an electron. The speed of the electron is $v_{e}=\frac{c}{100}$ then
The decay constant of radium is $ 4.28 \times 10^{-4} $ per yr .Its half-life is approximately