Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Equilibrium
What is the common ingredient in antacid, mild abrasive in tooth paste, a constituent of chewing gum, and a filler in cosmetics?
1
Magnesium sulphate
2
Calcium carbonate
3
Ascorbic acid.
4
More than one of the above
5
None of the above