Chemistry Test ...

Freezing point of a 4% aqueous solution of X is equal to freezing point of 12% aqueous salution of Y. If molecular weight of X is A, then molecular weight of Y is:

The solubility of \(\mathrm{Ca}(\mathrm{OH})_2\) in water is [Given: The solubility product of \(\mathrm{Ca}(\mathrm{OH})_2\) in water \(=5.5 \times 10^{-6} \mathrm{]}\)

A hydrocarbon has molecular formula C₂H₆.Which of the class of hydrocarbons cannot have this formula?

Which of the following pollutant is a component of Acid rains?

The molality of a \(10 \%(\mathrm{v} / \mathrm{v})\) solution of di-bromine solution in \(\mathrm{CCl}_4\) (carbon tetrachloride) is ' \(\mathrm{x}\) '. \(\mathrm{x}=\ldots-\) _ \(^{-} \times 10^{-2} \mathrm{M}\). (Nearest integer)

[Given: molar mass of \(\mathrm{Br}_2=160 \mathrm{gmol}^{-1}\)

atomic mass of \(\mathrm{C}=12 \mathrm{gmol}^{-1}\)

atomic mass of \(\mathrm{Cl}=35.5 \mathrm{gmol}^{-1}\)

density of dibromine \(=3.2 \mathrm{gcm}^{-3}\)

density of \(\left.\mathrm{CCl}_4=1.6 \mathrm{gcm}^{-3}\right]\)

The oxygen dissolved in water exerts a partial pressure of \(20 \mathrm{kPa}\) in the vapour above water. The molar solubility of oxygen in water is....\(\times 10^{-5} \mathrm{~mol} \mathrm{~d} \mathrm{~m}^{-3}\). (Round off to the nearest integer).

[Given, Henry's law constant \(\left(\mathrm{K}_{\mathrm{H}}\right)=8.0 \times 10^4 \mathrm{kPa}\) for \(\mathrm{O}_{2^{\prime}}\)

density of water with dissolved oxygen \(=1.0 \mathrm{kgd} \mathrm{m}^{-3}\).

Most abundant organic compound on earth is _______________.

56.0 L of nitrogen gas is mixed with excess hydrogen gas and it is found that 20L of ammonia gas is produced. The volume of unused nitrogen gas is found to be______ L.

Two salts \(\mathrm{A}_2 \mathrm{X}\) and \(\mathrm{MX}\) have the same value of solubility product of \(4.0 \times 10^{-12}\). The ratio of their molar solubilities i.e \(\frac{\mathrm{S}\left(\mathrm{A}_2 \mathrm{X}\right)}{\mathrm{S}(\mathrm{MX})}=\ldots \ldots\)

(Round off to the nearest integer)

Which of the following gives benzoic acid on oxidation?