|
Alum is used as |
|
|||
|
(a) |
an analgesic |
(b) |
a fertilizer |
|
|
(c) |
a disinfectant |
(d) |
a purifier for water |
|
|
Alum is used as |
|
|||
|
(a) |
an analgesic |
(b) |
a fertilizer |
|
|
(c) |
a disinfectant |
(d) |
a purifier for water |
|