Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Surface Chemistry
Colloids have particle size range between
1
10-7 to 10-10 m
2
10+7 m to 10+10 m
3
10-10 m to 10-12 m
4
More than one of the above
5
None of the above