List of practice Questions

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.

Square-planar geometry is shown by

Signals for parturition originate from

Shape and hybridisation of $SO_2$ are

Select the correct statement from the following regarding cell membrane

Select the correct order in relation with the bond length

Second stage of hydrosere is occupied by plants like

Schneiderian membrane is found in

Sacred groves are useful in

RNA interference is essential for the

Richmond-Lang effect can be observed in plants by the treatment of