1. A drop of olive oil of radius 0.25 mm spreads into a circular film of radius 10 cm on the water surface. Estimate themolecular size of olive oil.ans question 2 is in attached image.

1. A drop of olive oil of radius 0.25 mm spreads into a circular fi

1.	1. A drop of olive oil of radius 0.25 mm spreads into a circular film of radius 10 cm on the water surface. Estimate themolecular size of olive oil.ans question 2 is in attached image.
Answer» N:(Question 1.)Given:Radius of olive oil (r) = 0.25mmConverting it into cm,0.25mm = 0.025cm∴ 10mm = 1cmThe radius of the circular film, (R) = 10cmTo find:The MOLECULAR size (t)As we know that(π) will be cancelled in both numerator and denominator.Hence,The molecular size of olive oil is cm- - QUESTION 2.If the size of a nucleus (≈ 10⁻¹⁵ m) is scaled up to the tip os a SHARP pin (≈ 10⁻⁵ m), what roughly is the size of the atom?SOLUTION:Magnification in size = 10¹⁰So,The actual size of an atm is 10⁻¹⁰m = 1 Angstrom, which is scaled up by a factor 10¹⁰.Therefore,The apparent size of an atom = 10⁻¹⁰ × 10¹⁰ = 1mHence,A nucleus in an atom is a SMALL in size as the tip of a sharp pin located at the centre of a sphere of the radius of ONE METRE.