Which of the following electrolytic solution has the least specific conductance?

\(25 \mathrm{~mL}\) of \(0.08 \mathrm{~N}\) Mohr salt solution is oxidised by \(20 \mathrm{~mL}\) of \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) in acid medium. The mass of Mohr's sallt present in 500 cc is

Match the reactions in Column I with the correct products given in Column II:
\(\begin{array}{|l|l|l|l|} \hline \text{S.N.} & \text{Column I} & \text{S.No.} & \text{Column II} \\ \hline \text{A} & 1- \text{Chloropropane} + (\mathrm{Zn} / \mathrm{HCl}) \rightarrow & \text{P} & \text{Propanone + Methanal} \\ \hline \text{B} & n- \text{Hexane + (anh.} \left.\mathrm{AlCl}_3 / \mathrm{HCl}_{(\mathrm{g})}\right) \rightarrow & \text{Q} & \text{Propanone} \\ \hline \text{C} & 2- \text{Methylpropene} + ( \left.\mathrm{O}_3 ~\&~ \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}\right) \rightarrow & \text{R} & \text{Propane} \\ \hline \text{D} & \text{Propyne} +\left(\mathrm{HgSO}_4 / \mathrm{H}_2 \mathrm{SO}_4\right. at 333 K) \rightarrow & \text{S} & \text{2-Methylpentane + 3-Methylpentane} \\ \hline \end{array}\)

Coupling reaction is an example of

Arrange the compounds \(\mathrm{A}, \mathrm{B}, \mathrm{C}\) and \(\mathrm{D}\) in the increasing order of their reactivity towards \(\mathrm{S_N}1\) reaction.
\(
\begin{aligned}
& \mathrm{A}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Cl} \\
& \mathrm{B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl} \\
& \mathrm{C}=\mathrm{CH}_2=\mathrm{CH}-\mathrm{Cl} \\
& \mathrm{D}=\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{Cl}
\end{aligned}\)

The \(\mathrm{pH}\) of a mixture of \(10 \mathrm{~mL}\) of \(0.1 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\). \(5 \mathrm{~mL}\) of \(0.2 \mathrm{~N} \mathrm{HCl}\) and \(5 \mathrm{~mL}\) of \(0.1 \mathrm{M} \mathrm{Ca}(\mathrm{OH})_{2}\) is

The chemical equilibrium of a reversible reaction is not influenced by

Which of the following conditions are favourable for chemisorption?

One volt induced emf is produced in the secondary coil when the current through the primary coil is changed from \(3 \mathrm{~A}\) to \(1 \mathrm{~A}\) in 100 milliseconds. the mutual inductance of the two coil is:

The vector \((\vec{r})\) whose magnitude is \(3 \sqrt{2}\) units which makes an angle of \(\dfrac{\pi}{4}\) and \(\dfrac{\pi}{2}\) with \(y\) and \(z\)- axis respectively is

\(11^{3}+12^{3}+13^{3}+\ldots . .+20^{3}\) is

An LED is constructed from a \(p\)-\(n\) junction diode using GaAsP. The energy gap is \(1.9 \mathrm{~eV}\). The wavelength of the light emitted will be equal to

The coordinates of the vertices of the triangle are \(A(-2,3,6), B(-4,4,9)\) and \(C(0,5,8)\). The direction cosines of the median \(\mathrm{BE}\) are