Question

A block of wood is so loaded that it just floats in water at room temperature. If some salt is added to water, then the wood

• A. sinks
• B. just floats in water
• C. floats with some part outside water
• D. none of these

Answer 1

The correct option is C

floats with some part outside water

On adding some salt to water, the density of water increases, so upthrust on the block of wood increases. The block rises up till the weight of salty water displaced by the submerged part of the block becomes equal to the weight of the block.