NEET Chemistry: Chemistry Class 11: Water questions with solutions

Q1. Which is true statement about \( \boldsymbol{H}_{2} \boldsymbol{O} \) ?

1. Hardness can be removed by passing through ion exchange resin
2. Its pressure can be detected by anhydrous \( C u S O_{4} \)
3. It is amphoprotic
4. All of the above

Answer: All of the above

All three statements are true. Ion-exchange resins remove hardness ions like Ca2+ and Mg2+, anhydrous CuSO4 turns blue in the presence of water, and H2O is amphiprotic because it can both donate and accept a proton.