state gov Bihar SSC (BSSC) Inter Level Mock Test 2024 - 25 General Science Chemistry Chemical Reaction
Which of the following are physical means of purifying water ?
I. decantation
II. chlorination
III. filtration
IV. sedimentation
Select the correct answer using the codes given below.
1
I and II
2
II and III
3
I, II and III
4
I, III and IV