Multiple choice

An egg sinks in soft water but floats in a concentrated solution of salt because

  1. egg absorbs salt from the solution and expands

  2. albumin dissolves in salt solution and egg becomes lighter

  3. the density of salt solution exceeds the density of an egg

  4. water has high surface tension
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

According to Archimedes' principle, an object floats if the density of the fluid is greater than the density of the object. Adding salt to water increases the density of the solution until it exceeds the density of the egg.

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