MCQOPTIONS
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MCQOPTIONS
| 1. |
Hardness of water is due to presence of salts of [BHU 2005] |
| A. | \[N{{a}^{+}}\] and \[{{K}^{+}}\] |
| B. | \[C{{a}^{2+}}\]and \[M{{g}^{2+}}\] |
| C. | \[C{{a}^{2+}}\]and \[{{K}^{+}}\] |
| D. | \[C{{a}^{2+}}\] and \[N{{a}^{+}}\] |
| Answer» C. \[C{{a}^{2+}}\]and \[{{K}^{+}}\] | |