Multiple choice

Consider saucer A containing seawater, saucer B containing river water and saucer C containing processed drinking water poured from a packaged pouch. What will happen when all three of them are kept exposed to direct sunlight for two days provided that the amount of water in each of the saucers is the same?

  1. All three water samples will evaporate at the same time.

  2. Rate of evaporation will be the highest in drinking water followed by river water and least in the seawater.

  3. Rate of evaporation will be the highest in seawater followed by river water and least in the drinking water.

  4. Seawater and river water will evaporate, but the drinking water will remain as it is.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rate of evaporation decreases with increase in density of the evaporating liquid. Density of seawater > river water > drinking water Therefore, seawater evaporates at a lower rate. 

Keep practicing — related questions