Chemistry Test ...

For \(1 \mathrm{M}\) solution of \(\mathrm{HA}\), the dissociation constant \(\mathrm{K}_{\mathrm{a}}\) in terms of vant Hoff factor (i) can be written as :

Iron is extracted from iron oxide using carbon monoxide as shown.

iron oxide + carbon monoxide → iron + carbon dioxide

Which statement is correct?

The heats of adsorption (in kJ/mol) in physisorption or physical adsorption lie in the range of:

The solubility of mercurous chloride in water is given as:

Compound A contains \(8.7 \%\) Hydrogen, \(74 \%\) Carbon and \(17.3 \%\) Nitrogen. The molecular formula of the compound is, Given : Atomic masses of \(\mathrm{C}, \mathrm{H}\) and \(\mathrm{N}\) are 12,1 and \(14 \mathrm{amu}\) respectively.

The molar mass of the compound \(\mathrm{A}\) is \(162 \mathrm{gmol}^{-1}\).

Major products of the following reaction are :

The products obtained on heating LiNO₃ will be:

The element molybdenum (Mo) combines with sulphur (S) to form a compound commonly called molybdenum disulphide which used in specialized lithium batteries. A sample of this compound contains \(1.50 \mathrm{~g}\) of  Mo for each \(1.00 \mathrm{~g}\) of S. If a different sample of the compound contains \(2.50 \mathrm{~g}\) of S, how many grams of Mo does it contain?

Calculate the number of protons, neutrons and electrons in \({ }_{35}^{80} \mathrm{Br}\).

The \({pH}\) of a solution obtained by mixing \(100 {ml}\) of \(0.2 {M} {CH}_{3} {COOH}\) with \(100 {ml}\) of \(0.2 {M} {NaOH}\) would be \(\left(p K_{a C H_{3} C O O H}\right.\) \(=4.74)\)