Multiple choice general knowledge

WHAT DOES PING-PONG BALL CONTAIN?

  1. RICE GRAINS

  2. CAMPHOR

  3. SALT CRYSTALS

  4. NEPHALEON CRYSTALS
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Historically, ping-pong balls were made of celluloid, which contains camphor as a plasticizer to make the material flexible and bouncy. Modern balls use different plastics, but camphor was indeed a key ingredient in traditional balls. Rice, salt, and the non-existent 'nephaleon' are incorrect.

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