An oxide of chlorine with water gives the strongest acid. The ratio of chlorine and oxygen in its formula is

Arrange the following carbocations in the increasing order of stability with respect to their labels.
\(\begin{array}{c|c}
\hline \text { Label } & \text { Carbocation } \\
\hline 1 & \left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{+} \\
\hline 2 & \mathrm{CH}_3^{+} \\
\hline 3 & \left(\mathrm{CH}_3\right)_3 \mathrm{C}^{+} \\
\hline 4 & \mathrm{CH}_3-\mathrm{CH}_2^{+} \\
\hline
\end{array}\)

(i) \(\mathrm{H}_3 \mathrm{PO}_4(a q) \rightleftharpoons \mathrm{H}^{+}(a q)+\mathrm{H}_2 \mathrm{PO}_4^{-}(a q)\)
(ii) \(\mathrm{H}_2 \mathrm{PO}_4^{-}(a q) \rightleftharpoons \mathrm{H}^{+}(a q)+\mathrm{HPO}_4^{2-}(a q)\)
(iii) \(\mathrm{HPO}_4^{2-}(a q) \rightleftharpoons \mathrm{H}^{+}(a q)+\mathrm{PO}_4^{3-}(a q)\)
The equilibrium constants for the above reactions at a certain temperature are \(K_1, K_2\) and \(K_3\) respectively. The equilibrium constant for the reaction \(\mathrm{H}_3 \mathrm{PO}_4(a q) \rightleftharpoons 3 \mathrm{H}^{+}(a q)+\mathrm{PO}_4^{3-}(a q)\) in terms of \(K_1, K_2\) and \(K_3\) is

Match the following

The correct answer is

Among the following, van der Waals' constant \(a\) would be maximum for

According to molecular orbital theory, the total number of bonding electron pairs in \(\mathrm{O}_2\) is

Small quantities of \(\mathrm{NO}\) and \(\mathrm{HNO}_3\) are formed as impurities, when \(\mathrm{N}_2\) is prepared from \(\mathrm{NH}_4 \mathrm{Cl}\) (aq) and \(\mathrm{NaNO}_2\) (aq), these impurities can be removed by passing the \(\mathrm{N}_2\) gas through which of the following?

Four positive point charges $+q$ are kept at the four corners of a square of side $l$. The net electric field at the midpoint of any one side of the square is $($take $\frac{1}{4\pi {\in }_0}=k$)

Vapour density of a metal chloride is 83. If equivalent weight of the metal is 6, its atomic weight will be ____.

The correct order of acidic character of the following is:

At 300 K . the vapour pressures of \(A\) and \(B\) liquids are 500 and 400 mm Hg respectively. Equal moles of A and B are mixed to form an ideal solution, The mole fraction of \(A\) and \(B\) in vapor state is respectively

The sum of two numbers is 20 . If the product of the square of one number and cube of the other is maximum, then the numbers are :

If \(X\) is a poisson variate with \(P(X=0)=0.8\), then the variance of \(X\) is