A non-metal which reacts with concentrated sulphuric acid to form two gases which turn lime water milky is ______.
Show Hint
- Sulphur
- Carbon
- Oxygen
- Nitrogen
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Chemical Reaction:
Concentrated sulphuric acid (H_2SO_4) acts as a powerful oxidizing agent. When it reacts with elemental carbon, it oxidizes the carbon to carbon dioxide while being reduced to sulphur dioxide.
Step 2: Identifying the Product Gases:
The balanced chemical equation for the reaction is: [ C + 2H_2SO_4 (textconc.) CO_2 + 2SO_2 + 2H_2O ] The two gaseous products are Carbon dioxide (CO_2) and Sulphur dioxide (SO_2).
Step 3: Lime Water Test:
Both CO_2 and SO_2 have the property of reacting with lime water [calcium hydroxide, Ca(OH)_2] to form a white precipitate (CaCO_3 and CaSO_3 respectively), which makes the solution appear milky.
Step 4: Final Answer:
Carbon is the unique non-metal in this list that produces both of these gases simultaneously upon reaction with concentrated acid.
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