Chemistry Test-...

The mole fraction of toluene in vapour phase which is in equlibrium with a solution of benzene and toluene having a mole fraction of toluene \(0.50\) is (vapour pressure of pure benzene and pure toluene are 119 torr and \(37.0\) torr respectively at the same temperature).

When an electric current is passed through the copper sulfate solution, free copper ions get drawn to the electrode connected to the ________ terminal of the battery and get deposited on it.

Which scientist provided the basic theory about the nature of matter?

In the reaction \(2 \mathrm{BaO}_{2} \rightarrow 2 \mathrm{BaO}+\mathrm{O}_{2}\), the oxidation number of barium:

What will be the coefficient of \(\mathrm{HCl}\), instead of \(x\), in redox reaction given below?

\(\mathrm{Na}_{2} \mathrm{CO}_{3}+x \mathrm{HCl} \rightarrow 2 \mathrm{NaCl}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\)

Adsorption is different from absorption because adsorption is:

Which of the following molecules has$s{p}^3{d}^3$ hybridization and one lone pair of electrons?

\({ }_{92} \mathrm{U}^{235}\) undergoes nuclear fission as follows

\(\mathrm{n}+{ }_{92} \mathrm{U}^{235} \rightarrow{ }_{42} \mathrm{Mo}^{98}+{ }_{54} \mathrm{Xe}^{136}+2 \mathrm{n}\)

Energy released in fission of \(1 \mathrm{gm}\) of \({ }_{92} \mathrm{U}^{235}\) is (masses of \(n\) , \({ }_{92} \mathrm{U}^{235} , { }_{42} \mathrm{Mo}^{98}\) and \({ }_{54} \mathrm{Xe}^{136}\) are \(1.0087,235.0439,97.9054\) and \(135.9170\) (all in amu) respectively)

In alkyl cyanide, alkyl group attached with:

Match the column I with column II and mark the appropriate choice.