Consider an elementary reaction
\(\mathrm{A}(\mathrm{g})+\mathrm{B}(\mathrm{g}) \rightarrow \mathrm{C}(\mathrm{g})+\mathrm{D}(\mathrm{g})\)
If the volume of reaction mixture is suddenly reduced to \(\frac{1}{3}\) of its initial volume, the reaction rate will become ' \(x\) ' times of the original reaction rate. The value of \(x\) is :

Consider the following species:
BrF\(_5\), XeF\(_5^-\), BF\(_4^-\), ICl\(_4^-\), XeF\(_4\), SF\(_4\), NH\(_4^+\), ClF\(_3\), XeF\(_2\), ICl\(_2^-\)
Number of species having sp\(^3\)d hybridized central atom is __________.

\(K _{ a }\) for butyric acid \(\left( C _{3} H _{7} COOH \right)\) is \(2 \times 10^{-5}\). The \(pH\) of \(0.2 M\) solution of butyric acid is \(...........\times 10^{-1}\). (Nearest integer) [Given \(\log 2=0.30]\)

\(17\,mg\) of a hydrocarbon (M.F. \(C _{10} H _{16}\) ) takes up \(8.40\,mL\) of the \(H _2\) gas measured at \(0^{\circ}\,C\) and \(760\,mm\) of \(Hg\). Ozonolysis of the same hydrocarbon yields \(Image\) The number of double bond/s present in the hydrocarbon is \(...........\).

Good reducing nature of \(H_3PO_2\) is attributed to the presence of

Increasing order of reactivity of the following compounds for \(S_{N^{1}}\) substitution is

Consider the following reactions \((a)\;\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCH}(\mathrm{OH}) \mathrm{CH}_{3} \stackrel{\mathrm{conc.H}, \mathrm{SO}_{4}}{\longrightarrow}\) \((b)\;\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}(\mathrm{Br}) \mathrm{CH}_{3} \stackrel{\text { alc.KOH }}{\longrightarrow}\) \((c)\;\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}(\mathrm{Br}) \mathrm{CH}_{3} \xrightarrow[\text { It should be }\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CO}^{-} \mathrm{K}^{+}]{\text { given by } \mathrm{NTA}\left(\mathrm{CH}_{3}\right)_{3} \mathrm{O}^{-} \mathrm{K}^{+}}\) \((d)\;\begin{array}{*{20}{c}}
  {{{(C{H_3})}_2}C - C{H_2} - CHO} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}\xrightarrow{\Delta }\) Which of these reaction(s) will not produce Saytzeff product ?

Two dice are thrown  \(5\) times, and each time the sum of the numbers obtained being  \(5\) is considered a success. If the probability of having at least \(4\) successes is \(\frac{\mathrm{k}}{3^{11}}\), then \(\mathrm{k}\) is equal to

Consider the following electrochemical cell at standard condition.
\(\begin{aligned}
& \mathrm{Au}(\mathrm{s})\left|\mathrm{QH}_2, \mathrm{Q}\right| \mathrm{NH}_4 \mathrm{X}(0.01 \mathrm{M})| | \mathrm{Ag}^{+}(1 \mathrm{M}) \mid \mathrm{Ag}(\mathrm{s}) \\
& \mathrm{E}_{\text {cell }}=+0.4 \mathrm{~V}
\end{aligned}\)
The couple \(\mathrm{QH}_2 / \mathrm{Q}\) represents quinhydrone electrode, the half cell reaction is given below

The \(\mathrm{pK}_{\mathrm{b}}\) value of the ammonium halide salt \(\left(\mathrm{NH}_4 \mathrm{X}\right)\) used here is _________. (nearest integer)

A ball will a speed of \(9\, m / s\) collides with another identical ball at rest. After the collision, the direction of each ball makes an angle of \(30^{\circ}\) with the original direction. The ratio of velocities of the balls after collision is \(x : y\) where \(x\) is........

The total number of orbitals associated with the principal quantum number \(5\) is

\(\alpha=\sin 36^{\circ}\) is a root of which of the following equation

Number of complexes which will exhibit synergic bonding amongst, \([ Cr ( CO )_{6}], [ Mn ( CO )_{5}]\) and \([ Mn _{2}( CO )_{10}]\) is ..... .