A) 1 nm
B) 1-100 nm
C) < 100 nm
D) > 1000 nm
Correct Answer: B
Solution :
The particle size of colloids is 1-100 nm or \[{{50}^{o}}\overset{o}{\mathop{A}}\,\] to \[2000\overset{o}{\mathop{A}}\,\].
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