Question:
Identify the correct statements from the following:
The formula of Calgon is \( \text{Na}_6(\text{PO}_3)_6 \)
(II) Exhausted permutit is regenerated by aqueous KCl solution.
(III) Calcium stearate is soluble in water.
(IV) In ice crystals, each oxygen is surrounded by four oxygen atoms.
Identify the correct statements from the following:
The formula of Calgon is \( \text{Na}_6(\text{PO}_3)_6 \)
(II) Exhausted permutit is regenerated by aqueous KCl solution.
(III) Calcium stearate is soluble in water.
(IV) In ice crystals, each oxygen is surrounded by four oxygen atoms.
The formula of Calgon is \( \text{Na}_6(\text{PO}_3)_6 \)
(II) Exhausted permutit is regenerated by aqueous KCl solution.
(III) Calcium stearate is soluble in water.
(IV) In ice crystals, each oxygen is surrounded by four oxygen atoms.
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Remember: Calgon is sodium hexametaphosphate; permutit regeneration uses NaCl; calcium stearate is insoluble.
Updated On: May 17, 2025
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- I & IV only
- I & III only
- II & III only
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The Correct Option is B
Solution and Explanation
- (I) Correct: Calgon (water softener) is sodium hexametaphosphate: \( \text{Na}_6(\text{PO}_3)_6 \)
- (II) Incorrect: Permutit (used in ion-exchange) is regenerated using NaCl, not KCl.
- (III) Incorrect: Calcium stearate is insoluble in water; it forms soap scum.
- (IV) Correct: In ice, each oxygen is tetrahedrally surrounded by four other oxygen atoms via hydrogen bonding.
- (II) Incorrect: Permutit (used in ion-exchange) is regenerated using NaCl, not KCl.
- (III) Incorrect: Calcium stearate is insoluble in water; it forms soap scum.
- (IV) Correct: In ice, each oxygen is tetrahedrally surrounded by four other oxygen atoms via hydrogen bonding.
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