Multiple choice

Sodium hexametaphosphate is used as a/an

  1. cleansing agent

  2. ion exchange resin

  3. insecticide

  4. softening agent for hard water

  5. hardening agent for soft water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because the sodium carbonate are added in sodium hexametaphosphate to raise the pH. It acts as the breakdown of clay which settles down at the bottom of the surface and hard water changes into soft water.

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