A) \[{{10}^{-7}}{{10}^{-9}}cm\]
B) \[{{10}^{-9}}{{10}^{-11}}cm\]
C) \[{{10}^{-5}}{{10}^{-7}}cm\]
D) \[{{10}^{-2}}{{10}^{-3}}cm\]
Correct Answer: C
Solution :
The size of colloidal particles is in the range c 100 nm to 1 nm or \[{{10}^{-5}}cm\]to \[{{10}^{-7}}cm\]
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