A gas X is passed through water to forms a saturated solution .The aqueous solution on treatment with AgNO3 also dissolve magnesium ribbon with the evolation of a colourless gas Y. Identify X and Y

Options

A. `X = CO_(2),Y = Cl_(2)`
B. `X = Cl_(2),Y = CO_(2)`
C. `X = Cl_(2),Y = H_(2)`
D. `X = H_(2),Y = Cl_(2)`

Explanation

To solve the problem step by step, we need to identify the gases X and Y based on the information provided.

### Step 1: Identify Gas X
- The problem states that a gas X is passed through water to form a saturated solution. This implies that gas X must be soluble in water.
- A common gas that forms a saturated solution when passed through water is chlorine (Cl₂). When Cl₂ dissolves in water, it forms hydrochloric acid (HCl) and hypochlorous acid (HOCl).

**Hint:** Consider gases that are known to react with water to form acids or other soluble compounds.

### Step 2: Reaction with Silver Nitrate
- The aqueous solution formed from the gas X (which we identified as Cl₂) is treated with AgNO₃ (silver nitrate).
- When HCl (from the dissolved Cl₂) reacts with AgNO₃, it forms a white precipitate of silver chloride (AgCl) and nitric acid (HNO₃).

**Hint:** Look for reactions that produce precipitates when silver nitrate is involved.

### Step 3: Dissolving Magnesium Ribbon
- The problem states that the aqueous solution also dissolves magnesium ribbon with the evolution of a colorless gas Y.
- When magnesium (Mg) reacts with hydrochloric acid (HCl), it produces magnesium chloride (MgCl₂) and hydrogen gas (H₂). The hydrogen gas is colorless.

**Hint:** Consider the reactions of metals with acids to identify the gases produced.

### Step 4: Identify Gas Y
- From the reaction of magnesium with hydrochloric acid, the colorless gas evolved is hydrogen (H₂).

### Final Identification
- Therefore, we can conclude that:
- Gas X is chlorine (Cl₂).
- Gas Y is hydrogen (H₂).

### Answer:
- Gas X: Chlorine (Cl₂)
- Gas Y: Hydrogen (H₂)

### Summary of Steps:
1. Identify gas X as chlorine (Cl₂) based on its solubility in water.
2. Recognize that the reaction of HCl with AgNO₃ produces a white precipitate of AgCl.
3. Understand that magnesium reacts with HCl to produce hydrogen gas (H₂).
4. Conclude that gas Y is hydrogen (H₂).