Question

When a fresh egg is put into a beaker filled with water, it sinks. When the same egg is put in a strong salty water, then it floats. Which of the following is the incorrect statement in this context ?
(1) salt water enters into egg by osmosis and makes it lighter
(2) salt water exerts more buoyant force
(3) salt water is denser than tap water
(4) upthrust exerted by a liquid depends on its density

Answer 1

The density of an egg is higher than the density of the water, so a normal egg sinks when it's put in the water. But if the same egg is put in strongly salty water, it floats. Because the density of the salty water is more than the egg, so it exerts more buoyant force on the egg which balances its weight.

Hence, the correct answer is option 2.