List of practice Questions

The co-efficient of $x^{-12}$ in the expansion of$\left(x+\frac{y}{x^3}\right)^{20}$is
The co-efficient of $x^3$ in the expansion of $(1-x+x^2)^5$ is
The coagulation of colloidal particles of the sol can be caused by
The chemical reagent used for leaching of gold and silver ores is
The chief reaction product of reaction between n-butane and bromine at 130?C is :
The circle $ x^2 + y^2 - 25 = 0$ and $3(x^2 + y^2) - 30x - 40)' + 175 = 0$ touch each other at
The chemical name of aspirin is
The charge on cobalt in $ {[Co(CN)_6 ]^{3-}}$ is
The chemical composition of cryolite mineral is
The charge on $1$ gram ions of $Al^{3+}$ is
The charge on an electron was calculated by
The characters which appear in the first filial generation are called
The characteristic(s) common to urea, uric acid and ammonia is/are (i) They are nitrogenous wastes (ii) They all need very large amount of water for excretion (iii) They are all equally toxic (iv) They are produced in the kidneys
The characteristic's of light which are changed during modulation is/are
The characteristic property of organization is present
The cell wall is composed of two thin overlapping shells which fit together like a soap case in
The cells called '$HIV$ factory' is
The centre of mass of a non uniform rod of length L whose mass per unit length $\lambda=\frac{Kx^2}{L},$ Where k is a constant and x is the distance from one end is :
The cell constant is the product of resistance and
The cell reaction of the galvanic cell :$Cu (r)|Cu^2+(aq) ||Hg^{2+}(aq) Hg | (l)$ is
The cause of the fractional atomic weight of elements is
The cause of Brownian movement is
The catalytic activity of transition metals and their compounds is ascribed mainly to
The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ mol$^{-1}$) of C - C, Si - Si and Ge -Ge bonds are respectively;
The cartesian equation of the line $l$ when it passes through the point $(x_1, y_1, z_1)$ and parallel to the vector $\vec{b}=a\hat{i}+b\hat{j}+c\hat{k}$, is