Identify the pair of drugs which act as antihistamines.

What are the products formed when moist chlorine gas is reacted with hypo?

The stability of dihalides of \(\mathrm{Si}, \mathrm{Ge}, \mathrm{Sn}\) and \(\mathrm{Pb}\) follows the sequence.

Decreasing order of number of ionisable hydrogen atoms in the following molecules is
I. \(\mathrm{H}_3 \mathrm{PO}_4\)
II. \(\mathrm{H}_3 \mathrm{PO}_3\)
III. \(\mathrm{H}_3 \mathrm{PO}_2\)
IV. \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6\)

The standard reduction potentials of \(\mathrm{Zn}^{2+}\left|\mathrm{Zn}, \mathrm{Cu}^{2+}\right| \mathrm{Cu}\) and \(\mathrm{Ag}^{+} \mid \mathrm{Cu}\) and \(\mathrm{Ag}^{+} \mid \mathrm{Ag}\) are respectively \(-0.76,0.34\) and \(0.8 \mathrm{~V}\). The following cells were constructed : (1) \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}\right|\left|\mathrm{Cu}^{2+}\right| \mathrm{Cu}\) (2) \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}\right|\left|\mathrm{Ag}^{+}\right| \mathrm{Ag}\) (3) \(\mathrm{Cu}\left|\mathrm{Cu}^{2+} \| \mathrm{Ag}^{+}\right| \mathrm{Ag}\) What is the correct order of \(E_{\text {cell }}^{\circ}\) of these cells?

The bond orders of \(\mathrm{He}_2^{+}\)and \(\mathrm{He}_2\) are respectively

Xerophthalmia disease is caused by the deficiency of

Match the entries in List I with those in List II.

A conductor of length 1.5 m and area of cross-section \(3 \times 10^{-5} \mathrm{~m}^2\) has electrical resistance of \(15 \Omega\). The current density in the conductor for an electric field of \(21 \mathrm{Vm}^{-1}\) is

If \(\alpha, \beta\) are the roots of the equation \(x^2-4 x+8=0\), then for any \(n \in N, \alpha^{2 n}+\beta^{2 n}\) equals

\(6 \Omega\) and \(12 \Omega\) resistors are connected in parallel. This combination is connected in series with a \(10 \mathrm{~V}\) battery and \(6 \Omega\) resistor. What is the potential difference between the terminals of the \(12 \Omega\) resistor?

0.1 mole of \(\mathrm{NaCl}\) is dissolved in \(100 \mathrm{~g}\) of water. The mole fraction of \(\mathrm{NaCl}\) is