Chemistry Test ...

Which characteristic is not correct for physical adsorption?

Temporary hardness may be removed from water by adding:

Which one of the following has largest ionic radius?

On treating a compound with warm dil. \(\mathrm{H}_2 \mathrm{SO}_4\), gas \(\mathrm{X}\) is evolved, which turns \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) paper acidified with dil. \(\mathrm{H}_2 \mathrm{SO}_4\) to a green compound \(\mathrm{Y} . \mathrm{X}\) and \(\mathrm{Y}\) respectively are

Methyl isocyanide on reduction using \(\mathrm{LiAlH}_{4}\) gives:

The reaction of toluene with chlorine in \({FeCl}_{3}\) gives predominantly:

K₂[Hgl₄] detect the ion/group:

If Aufbau rule is violated, then \(\mathrm{Ca}^{20}\) will be in:

The wavelength range of the visible spectrum extends from violet \((400 \mathrm{~nm}\) ) to red ( \(750 \mathrm{~nm}\) ). Express these wavelengths in frequencies (Hz). (\(1 \mathrm{~nm} \left.=10^{-9} \mathrm{~m}\right)\):