Chemistry Test ...

Which of the following is not a redox reaction?

The other name for branched chain alkanes is _____________.

In a buffer solution containing an equal concentration of\(\mathrm{B}^{-}\)and HB, the\(\mathrm{K}_{\mathrm{b}}\)for \(\mathrm{B}^{-}\)is\(10^{-10}\). The \(\mathrm{pH}\) of the buffer solution is:

Isomeric amines with molecular formula \(\mathrm{C}_8 \mathrm{H}_{11} \mathrm{~N}\) given the following tests

Isomer \((\mathrm{P}) \Rightarrow\) Can be prepared by Gabriel phthalimide synthesis

Isomer \((\mathrm{Q}) \Rightarrow\) Reacts with Hinsberg's reagent to give solid insoluble in \(\mathrm{NaOH}\)

Isomer \((\mathrm{R}) \Rightarrow\) Reacts with \(\mathrm{HONO}\) followed by \(\beta\)-naphthol in \(\mathrm{NaOH}\) to given red dye.

Isomer \((\mathrm{P}),(\mathrm{Q})\) and \((\mathrm{R})\) respectively are

Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to

A sample of \(\mathrm{CaCO}_3\) and \(\mathrm{MgCO}_3\) weighed \(2.21 \mathrm{~g}\) is ignited to constant weight of \(1.152 \mathrm{~g}\). The composition of mixture is :

(Given molar mass in gmol \(^{-1} \left.\mathrm{CaCO}_3: 100, \mathrm{MgCO}_3: 84\right)\)

In an adsorption experiment, a graph between \(\log \left(\frac{x}{m}\right)\) versus \(\log p\) is found to be linear with slope of \(45^{\circ}\). The intercept on \(\log \left(\frac{\mathrm{x}}{\mathrm{m}}\right)\) axis was found to \(0.3010\). The amount of the gas adsorbed per gram of charcoal under the pressure of \(0.5 \mathrm{~atm}\) will be:

A mixture is known to contain \(N O_{ {3}}^-\) and \(N O_{ {2}}^-\). Before performing ring test for \(N O_{ {3}}^-\) the aqueous solution should be made free of \(N O_{ {2}}^-\). This is done by heating aqueous extract with:

The energy of a hydrogen atom in the ground state is \(13.6 \mathrm{eV}\). The energy of \(\mathrm{He}^+\) ion in the first excited state will be:

Trigonal bipyramidal geometry is shown by: