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जल के मुदुकरण में प्रयुक्त कैलगन है -A. `Na_(2) [Na_(4) (PO_(3))_(6)]`B. `Na_(4) [Na_(2) (PO_(3))_(6)]`C. `Na_(2) [Na_(4) (PO_(4))_(5)]`D. `Na_(4) [Na_(4) (PO_(4))_(6)]` |
| Answer» Correct Answer - a | |