Which of the following will show 'Tyndall effect?'

The correct answer is Milk.

Key Points

• The Tyndall effect is the scattering of light as it passes through a colloid.
• Milk is a colloid, which means it contains particles that are dispersed throughout a continuous medium.
• When light passes through milk, the particles in the colloid scatter the light, making the path of the light visible.
• This scattering of light is what is known as the Tyndall effect.
• Colloids like milk have particle sizes ranging from 1 to 1000 nanometers.
• The phenomenon is named after the 19th-century physicist John Tyndall, who first studied it.

 Additional Information

• Salt solution
  • A salt solution is a homogeneous mixture of salt (sodium chloride) dissolved in water.
  • It does not exhibit the Tyndall effect because the particles are ions, which are too small to scatter light.
• Sugar solution
  • A sugar solution is also a homogeneous mixture where sugar is dissolved in water.
  • Like the salt solution, it does not show the Tyndall effect as the sugar molecules are too small to scatter light.
• Copper sulphate solution
  • A copper sulphate solution is another homogeneous mixture where copper sulphate is dissolved in water.
  • This solution does not exhibit the Tyndall effect because the particles are ions, which do not scatter light.