Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) People Development & Environment Environmental Issues Pollution
Softening of hard water is done by
A. Aeration
B. Boiling
C. Lime soda
D. Ozonation
E. Ion exchange
Choose the correct answer from the options given below:
1
A. B and C Only
2
B, C and E Only
3
B, C and D Only
4
C, D and E Only