Question:

Polyphosphates are used as water softening agents because they

Updated On: Jun 14, 2022
  • form soluble complexes with anionic species
  • precipitate anionic species
  • form soluble complexes with cationic species
  • precipitate cationic species
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The Correct Option is C

Solution and Explanation

Polyphosphates are used as water softening agents because
they form soluble complexes with cationic species of hard
water.
$Na_2[Na_4(PO_3 )_6] + CaSO_4\longrightarrow ^{Na_2[(Ca_2(PO_3 )_6]+ Na_2SO_4}_{\, \, \, \, \, \, Soluble\, complex}$
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P-Block Elements

  • P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
  • P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of: