\(\mathrm{SO}_{2}+\mathrm{Cl}_{2} \stackrel{\text { Sunlight }}{\longrightarrow}\) Product The product is (a) Chloroform (b) Sulphuryl chloride (c) Sulphuric acid (d) None of these

The interaction between sulfur dioxide (SO2) and chlorine (Cl2) gas is a classic example of a photochemical reaction. Photochemical reactions are those chemical processes that require light to proceed. Sunlight provides the energy necessary for the breaking and forming of chemical bonds.

In this particular reaction, sunlight acts as a catalyst, providing the energy needed to initiate the process. When SO2 and Cl2 are exposed to sunlight, the chlorine molecules are energized and split into highly reactive chlorine radicals. These radicals then react with SO2, leading to the formation of a compound known as sulphuryl chloride (SO2Cl2).

Understanding this reaction is important for students as it demonstrates several key principles of chemistry, such as the role of light as a catalyst and the formation of free radicals.

Sulphuryl chloride (SO2Cl2) formation is a straightforward process under the right conditions, and involves direct synthesis from its constituent elements, sulfur dioxide and chlorine. The equation for the reaction is: \[\begin{equation}SO_2(g)+Cl_2(g) \rightarrow SO_2Cl_2(l)\text{in the presence of sunlight.}\end{equation}\]

During this reaction, the energy from sunlight excites the chlorine molecules, which then react with sulfur dioxide. Sulphuryl chloride, the product of this reaction, is commonly used as a solvent and a reagent in various industrial processes. Its formation is exothermic, meaning it releases heat, indicating the stability of the product formed from the reactants. Knowledge of the properties and the uses of sulphuryl chloride can be essential for students, especially in industrial applications of chemistry.

NEET (National Eligibility cum Entrance Test) is a preeminent medical entrance examination in India where chemistry is a significant subject. Preparing for the chemistry section requires a strong grasp of concepts, critical thinking, and the ability to apply knowledge to solve problems efficiently.

The sulfur dioxide and chlorine reaction and subsequent sulphuryl chloride formation may feature in the test as it covers topics like chemical reactions, stoichiometry, thermodynamics, and the practical applications of chemistry. To excel in questions like these, NEET aspirants should focus on understanding the fundamental principles that govern chemical reactions, memorize standard reaction conditions, and practice solving problems methodically.

To prepare effectively for chemistry in NEET, students should:

• Study NCERT textbooks thoroughly, as the basics are often derived from there.
• Practice previous years' question papers and take mock tests to improve speed and accuracy.
• Clarify doubts with educators or through reliable online educational platforms.
• Revise regularly to ensure retention of key concepts.

Ultimately, success in NEET chemistry demands consistent study habits, conceptual clarity, and practical application of knowledge.