A) \[{{10}^{-1}}\]to\[{{10}^{-3}}cm\]
B) \[{{10}^{-5}}\]to\[{{10}^{-7}}cm\]
C) \[{{10}^{-8}}\]to\[{{10}^{-5}}cm\]
D) \[{{10}^{-6}}\]to\[{{10}^{-8}}cm\]
Correct Answer: B
Solution :
In colloidal state, particle size ranges from (\[10\]to\[1000\,\,{\AA}\]). \[1\,\,{\AA}={{10}^{-8}}cm,\,\,10\,\,{\AA}={{10}^{-7}}cm\] \[\therefore \]Particle size of colloidal state is\[{{10}^{-5}}\]to\[{{10}^{-7}}cm\].
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