KVPY2011ChemistrySurface Chemistry
When the size of a spherical nanoparticle decreases from 30 ~nm to 10 ~nm , the ratio surface area/volume becomes
Options
- A1 / 3 of the original
- B3 times the original
- C1 / 9 of the original
- D9 times the original
Correct answer
B. 3 times the original
Step-by-step solution
Surfacearea Volume = d ² d ³ 6 = 6 ~d ~d ₁=30 ~nm ~d ₂=10 ~nm ( Surface area Volume )₂= 6 ~d ₂ 6 ~d ₁ = d ₁ ~d ₂ = 30 10 =3