Q443
Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water.
A.
Magnesium
B.
Calcium
C.
Manganese
D.
None of these
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Brown stains in vessels and clothes generally indicate the presence of high quantities of iron. It causes reddish-brown staining of laundry, porcelain, dishes, utensils and even glassware. Manganese acts in a similar way but causes a brownish-black stain. Soaps and detergents do not remove these stains.