Q. A water sample analysis data is given below.
| Ion | Concentration, mg/L | Atomic Weight |
| Ca2+ | 60 | 40 |
| Mg2+ | 30 | 24.31 |
| HCO3- | 400 | 61 |
The carbonate hardness (expressed as mg/L of CaCO3, up to one decimal place) for the water sample is
Ans: 272.0 – 274.0
Sol:
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
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