A compound A of S, Cl and O has a vapour density of 67.5. It...

A compound A of S, Cl and O has a vapour density of $67.5$. It reacts with water to form two acids and reacts with $\mathrm{KOH}$ to form two salts $\mathrm{B}$ and $\mathrm{C}$. while B gives white precipitate with $\mathrm{AgNO}_{3}$ solution, C gives white precipitate with $\mathrm{BaCl}_{2}$ solution. Identify A (a) $\mathrm{SOCl}_{2}$ (b) $\mathrm{SO}_{2} \mathrm{Cl}_{2}$ (c) $\mathrm{SO}_{2} \mathrm{Cl}$ (d) none of these

A compound A of S, Cl and O has a vapour density of $67.5$. It reacts with water to form two acids and reacts with $\mathrm{KOH}$ to form two salts $\mathrm{B}$ and $\mathrm{C}$. while B gives white precipitate with $\mathrm{AgNO}_{3}$ solution, C gives white precipitate with $\mathrm{BaCl}_{2}$ solution. Identify A
(a) $\mathrm{SOCl}_{2}$
(b) $\mathrm{SO}_{2} \mathrm{Cl}_{2}$
(c) $\mathrm{SO}_{2} \mathrm{Cl}$
(d) none of these

Key Concepts

Vapour Density

Vapour density is a property that relates the mass of a gas to a fixed volume under specified conditions. It is often used in determining the molecular weight of a compound by comparing the density of its vapour to that of a reference gas, usually hydrogen or air. This concept is vital in deducing the molecular formula and establishing the identity of a gaseous compound.

Molecular Mass Determination

Determining the molecular mass of a compound using vapour density involves using the relationship that molecular weight is twice the vapour density (when compared to hydrogen as a reference). This allows chemists to deduce the probable stoichiometry of the compound's atoms, aiding in the identification of its molecular formula when considered alongside the known atomic weights.

Hydrolysis Reactions

Hydrolysis reactions describe how a compound reacts with water to yield two or more products, often acids or bases. These reactions are fundamental in inorganic chemistry and are used to study the behavior of certain compounds, particularly those that can split into different acid components upon contact with water.

Precipitation Tests

Precipitation tests are a qualitative analysis method used to identify the presence of specific ions in a solution. By adding reagents such as silver nitrate or barium chloride, which form insoluble salts with certain anions, chemists can infer the composition of the original compound. These tests are critical in chemical analysis and confirmatory procedures in various reactions.

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