Tardigrade
Tardigrade - CET NEET JEE Exam App
Exams
Login
Signup
Tardigrade
Question
Chemistry
Alum is widely used to purify water since :
Question Error Report
Question is incomplete/wrong
Question not belongs to this Chapter
Answer is wrong
Solution is wrong
Answer & Solution is not matching
Spelling mistake
Image missing
Website not working properly
Other (not listed above)
Error description
Thank you for reporting, we will resolve it shortly
Back to Question
Thank you for reporting, we will resolve it shortly
Q. Alum is widely used to purify water since :
AIEEE
AIEEE 2002
A
it forms complex with clay particles
B
it coagulates the mud particles
C
it exchanges $Ca ^{2+}$ and $Mg ^{2+}$ ions present in hard water
D
its sulphate ion is water purifier
Solution:
Mud is colloidal charged solution which on treatment with alum $(Al^{3+})$ gets neutralised or coagulated.