List of practice Questions

The first clinical gene therapy was given for treating

The figure shows an experimental plot discharging of a capacitor in an $RC$ circuit. The time constant $\tau$ of this circuit lies between :

The external diameter of a $314\, m$ long copper tube is $1.2\, cm$ and the internal diameter is $1 \,cm$. Calculate its resistance if the specific resistance of copper is $ 2.2\times {{10}^{-8}}\Omega -m $

The equivalent inductance of two inductors is $2.4 \,H$ when connected in parallel and $10 \,H$ when connected in series. What is the value of inductances of the individual inductors?

The elements of xylem tissue that stores tannins are

The element that does not show catenation among the following $p$-block elements is

The electron affinity of chlorine is $3.7\, eV. \,1$ gram of chlorine is completely converted to $Cl^-$ ion in a gaseous state. $(1\, eV = 23.06\, kcal\, mol^{-1})$. Energy released in the process is

The electrode potential E$_{\left(\frac{Zn^{2+}}{Zn}\right)}$ of a zinc electrode at 25$^{\circ}$C with an aqueous solution of 0.1M $ZnSO_4$ is (E$^{\circ}$$_{\left(\frac{Zn^{2+}}{Zn}\right)}$ = -0.76 V. Assume $\frac{2.303RT}{F} =$ 0.06 at 298 K)

The electric force between two point charges separated by a certain distance d in air is F.The distance at which they should be placed in a medium of relative permittivity k so that the force remain the same is

The dominant generation in pteridophytes is

The dissociation constant of a substituted benzoic acid at $25^{\circ}C$ is $1.0 \times 10^{-4}$. The $pH$ of $0.01 \,M$ solution of its sodium salt is

The difference between the reaction enthalpy change $\left( \Delta_{r}H\right)$ and reaction internal energy change $\left( \Delta_{r}U\right)$ for die reaction : $2C_{6}H_{6} \left(1\right) +15O_{2} \left(g\right) \to 12CO_{2} \left(g\right) + 6H_{2}O\left(1\right)$ at $300$ K is $\left(R=8.31 \,,mol^{-1}K^{-1}\right)$

The density of a solution prepared by dissolving $120\, g$ of urea (mol. mass = $60\, u$) in $1000 \,g$ of water is $1.15\, g/mL$. The molarity of this solution is :

The d-electron configurations of $Cr^{2+},Mn^{2+},Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. $Cr=24, Mn=25, Fe=26, Co=27$).

The current $(I)$ in the inductance is varying with time according to the plot shown in figure.

Which one of the following is the correct variation of voltage with time in the coil?

The correct statement for both the processes of physisorption and chemisorption is

The conversion of benzene diazonium chloride to bromobenzene can be accomplished by

The coefficient of viscosity for hot air is

The chlorination of methane is an example of

The ??ells of Rauber??are

The capacitance of a spherical conductor of radius $1 \,m$ is

The area of the triangle whose vertices are complex numbers z, iz, z + iz in the Argand diagram is

Synthetic polymer bakelite can be prepared from following compounds

An equation of a common tangent to the parabola $y^{2} = 16\sqrt{3}x$ and the ellipse $2x^{2} + y^{2} = 4$ is $y = 2x + 2\sqrt{3}$ If the line $y = mx + \frac{4\sqrt{3}}{m}, \left(m\ne0\right)$ is a common tangent to the parabola $y^{2} = 16\sqrt{3}x$ and the ellipse $2x^{2} + y^{2} = 4$, then m satisfies $m^{4} + 2m^{2} = 24.$

The degrees of the differential equations $\frac{dy}{dx}+y^{2} = x$ and $\frac{d^{2}y}{dx^{2}} + y = sin\,x$ are equal. The degree of a differential equation, when it is a polynomial equation in derivatives, is the highest positive integral power of the highest order derivative involved in the differential equation, otherwise degree is not defined.