The chemical formula of Hinsberg's reagent is

The amine which will not liberate nitrogen with nitrous acid is

Which of the following show both Frenkel and Schottky defect?

The \(\mathrm{RMS}\) velocity of \(\mathrm{CH}_{4}, \mathrm{He}\) and \(\mathrm{SO}_{2}\) are in the ratio of

The initial amount of 2 radioactive elements X and Y is 1 g each and their half-lives are 12 hours and 16 hours respectively. The ratio of X and Y after 2 days is:

A crystalline solid has \(A^{-}\)ions at the corners and face centres, whereas \(B^{+}\)ions are at the body centre and edge centres of the unit cell. The simplest formula of the compound will be

Which one of the following structures in Column I does not have the correct IUPAC name as given in Column II.
\(\begin{array}{|c|l|l|} \hline \text { S.No. } & \text { Structure } & \text { IUPAC name. } \\ \hline \text { A } & {\left[\mathrm{CoBr} r_2(\mathrm{en})_2\right] \mathrm{Cl}} & \text { Dibromidodi-( ethan-1, 2 - diamine)cobalt (III) chloride } \\ \hline \text { B } & \mathrm{Na}\left[\mathrm{PtBrCl}\left(\mathrm{NO}_2\right)\left(\mathrm{NH}_3\right)\right] & \text { Sodium amminebromidochloridonitrito- N- palatinate(II) } \\ \hline \text { C } & {\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_2\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}\right] \mathrm{SO}_4} & \text { Tetraamminediaquachloridochromium (III) sulphate. } \\ \hline \text { D } & {\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right]\left[\mathrm{PtCl}_4\right]} & \text { Tetraammineplatinum (II) tetrachloridoplatinate (II) } \\ \hline \end{array}\)

The correct decreasing order of negative electron gain enthalpy for \(\mathrm{C}, \mathrm{Ca}, \mathrm{Al}, \mathrm{F}\) and \(\mathrm{O}\) is

What would be the volume of water required to dissolve \(0.2 \mathrm{~g}\) of \(\mathrm{PbCl}_2\) of molar mass \(278 \mathrm{~g} / \mathrm{mol}\) to prepare a saturated solution of the salt? \((\mathrm{K}_{\mathrm{SP}}\) of \(\mathrm{PbCl}_2=3.2 \times 10^{-8})\)

In acidic medium, potassium permanganate oxidises oxalic acid to

The area of a triangle formed by the lines joining the vertex of the parabola \(x^2=\lambda y\) to the ends of its latus rectum is 18 sq units then the value of \(\lambda\) is

The EMF of the cell \(\mathrm{Al} / \mathrm{Al}^{3+}(0.01 \mathrm{M}) \| \mathrm{Fe}^{2+}(0.02 \mathrm{M}) / \mathrm{Fe}\) is 1.209 V . The EMF of the cell can be increased by ------------------------------

An alternating voltage \(=200 \sin 100 t\) is applied to a series combination of \(R=30 \Omega\) and an inductor of \(400 \mathrm{mH}\). The power factor of the circuit is,