Q1: Bond crushing law

ANS:A - calls for relatively less energy for the smaller product particles, than does the Rittinger law.

The correct statement regarding Bond's crushing law is: "States that the work required for crushing is proportional to the square root of the volume to surface ratio of the product."

Explanation:

• Bond's Crushing Law: Bond's law states that the work required to form particles of any size from very large feed is proportional to the square root of the volume to surface ratio of the product particles.
• Key Points:
  • Bond's law contrasts with Rittinger's law, which states that the work required is proportional to the new surface area created (not mentioned in the options provided).
  • Bond's law is considered more realistic for estimating the energy requirements of commercial crushers compared to Rittinger's law, especially in applications where particles are reduced to smaller sizes.
• Options Analysis:
  • The statement about Bond's law being less realistic in estimating power requirements is not accurate; it is generally considered more applicable than Rittinger's law for industrial crushing operations.
  • The statement that Bond's law calls for relatively less energy for smaller product particles than Rittinger's law is not directly supported by the principles of Bond's law.
  • Bond's law does not explicitly state that the work required is proportional to the new surface created; rather, it focuses on the relationship involving the volume to surface ratio of the product.