A) \[N{{a}_{2}}[N{{a}_{4}}{{(P{{O}_{3}})}_{6}}]\]
B) \[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{3}})}_{6}}]\]
C) \[N{{a}_{4}}[N{{a}_{4}}{{(P{{O}_{4}})}_{5}}]\]
D) \[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{4}})}_{6}}]\]
Correct Answer: A
Solution :
[a] The complex salt of metaphosphoric acid sodium hexametaphosphate \[{{(NaP{{O}_{3}})}_{6}}\] is known as calgon. It is represented as \[N{{a}_{2}}[N{{a}_{4}}{{(P{{O}_{3}})}_{6}}]\]
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