Basics of Chemistry
Quick practice
Question 1 of 5
Which of the following gases is used to purify drinking water?
A
Fluorine
B
Carbon dioxide
C
Helium
D
Chlorine
Get unlimited practice with Uttar Pradesh State Exams subscription
Boost your performance with adaptive practice tests
Practice every concept in the syllabus
Compare your speed and accuracy with your peers
Download the app and practice on the go