Chemistry Test ...

In the reaction, \(\mathrm{Cl}_{2}+\mathrm{OH}^{-} \rightarrow \mathrm{Cl}^{-}+\mathrm{ClO}_{3}+\mathrm{H}_{2} O\), chlorine is:

If \(1.202 {~g} {~mL}^{-1}\) is the density of \(20 \%\) aqueous KI, determine themolality of KI.

A pH electrode obeys Nernst equation and is being operated at \(25^{\circ} \mathrm{C}\). The change in the open circuit voltage in millivolts across the electrode for a pH change from \(6\) to \(8\) is ___________.

Molal depression constant for a solvent is \(4.0 \mathrm{~K} \mathrm{kgmol}^{-1}\). The depression in the freezing point of the solvent for \(0.03 \mathrm{~mol} \mathrm{~kg}^{-1}\) solution \(\mathrm{K}_2 \mathrm{SO}_4\) is:

(Assume complete dissociation ofthe electrolyte)

The rate constant for a first order reaction is \(4.606 \times 10^{-3} \mathrm{~s}^{-1}\). The time required to reduce \(2.0 g\) of the reactant to \(0.2 g\) is:

The enthalpy of combustion of methane, graphite and dihydrogen at \(298 \mathrm{~K}\) are \(-890.3 \mathrm{~kJ} \mathrm{~mol}^{-1},-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\), and \(-285.8 \mathrm{~kJ} \mathrm{~mol}^{-1}\) respectively. Enthalpy of formation of \(\mathrm{CH}_{4}(\mathrm{g})\) will be:

The arrangement of elements in the Modem Periodic Table is based on their:

Calculate (a) wavenumber and (b) frequency of yellow radiation having wavelength \(5800 Å\).

Coal is the chief source of:

Which one of the following is the functional group in Propanone?