Question

JEE MAINS CHEMISTRY QUESTION SEPTEMBER 2020

Answer 1

Answer:

• X and Y are SO₂ and Na₂SO₃ respectively.

Explanation:

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As given, Sulphur (S) reacts with H₂SO₄ to form a compound named 'X'. we know that Sulphur reacts with concentrated sulphuric acid to form Sulphur dioxide (SO₂).

Chemical Reaction:

$\bigstar\;\sf S\;+\;H_{2}SO_{4}\longrightarrow SO_{2}\;+\;H_{2}O$

Now, this Sulphur dioxide (SO₂) reacts with Sodium hydroxide (NaOH) to form Sodium sulphite (Na₂SO₃) and liberates a water (H₂O) molecule.

Chemical Reaction:

$\bigstar\;\sf SO_{2}\;+\; NaOH\longrightarrow Na_{2}SO_{3}\; +\; H_{2}O$

Again, Sodium sulphite (Na₂SO₃) reacts with diluted sulphuric acid (H₂SO₄) to form Sulphur dioxide (SO₂).

Chemical Reaction:

$\bigstar\;\sf Na_{2}SO_{3}\;+\; H_{2}SO_{4}\longrightarrow SO_{2}\;+\;NaHSO_{4}$

So, Option (2) SO₂ and Na₂SO₃ is the correct answer.

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