A vector perpendicular to the vector \((4 \hat{\mathrm{i}}-3 \hat{\mathrm{j}})\) is

Match the following lists.
\begin{array}{|c|c|c|c|}
\hline & List I & & List II \\
\hline A & \begin{array}{l}\text { Zeroth law of } \\
\text { thermodynamics }\end{array} & 1 & \begin{array}{l}\text { Direction of flow of } \\
\text { heat }\end{array} \\
\hline B & \begin{array}{l}\text { First law of } \\
\text { thermodynamics }\end{array} & \| & Work done is zero \\
\hline\underline{\mathrm{C}} & Free expansion of a gas & III & Thermal equilibrium \\
\hline D & \begin{array}{l}\text { Second law of } \\
\text { Thermodynamics }\end{array} & IV & \begin{array}{l}\text { Law of conservation } \\
\text { of energy }\end{array} \\
\hline
\end{array}
The correct answer is
\(\begin{array}{lccccccccc} & \text { A } & \text { B } & \text { C } & \text { D } \end{array}\)

A pressure of \(1 \mathrm{~mm}\) of mercury is equivalent to

A car of mass \(1500 \mathrm{~kg}\) is moving with \(20 \mathrm{~ms}^{-1}\) velocity. If the breaks are applied it comes to rest in 5 seconds, then the retarding force is

The voltage \(\mathrm{V}_0\) in the network shown is

If the time period of revolution of a satellite is \(T\). then its kinetic energy is proportional to

W. K. Roentgen discovered

Assertion (A) At critical temperature, surface tension of liquids become zero.
Reason (R) At critical temperature, intermolecular forces for liquids and gases become equal.

If \(y=\log _2\left(\log _2 x\right)\), then \(\frac{d y}{d x}\) is equal to

Truth table for the given circuit is

In an atom the difference between two energy levels is \(3.31 \mathrm{eV}\), then the wavelength of the radiation emitted when the transition takes place between these levels is nearly

Two roots of the equation \(a x^4+b x^3+c x^2+d x+e=0\) are positive and equal. If the product of the other two real roots is 1, then

The number of angular and radial nodes of \(4 d\) orbital respectively are