Water Test - 1...

Which of the following are the forms of surface water?

(i) Streams
(ii) River water
(iii) Lakes
(iv) Springs

________ is observed on the leaves of grass and plants on winter mornings.

Consider the following statements:

(i) The liquid in which a substance dissolves is the solvent.
(ii) The substance which gets dissolved in a solvent is the solute.
(iii) On heating a saturated solution, the excess salt gets precipitated from the solution.
(iv) The resultant mixture obtained when no more solute can be dissolved in the solvent is called a saturated solution.

Which of the above statements is not correct?

Which of the following actions will not help in prevention of water pollution?

In which of the following cases will evaporation of water be the fastest if equal quantity of water is taken in each of the cases?

Which of the following statements is/are false?

a. Red worms used for vermicomposting grind their food with their teeth.
b. Vermicompost contains a large amount of castings, which are, the material that passses through the gut of the worms.
c. Compost does not pollute the environment.

Which of the following is a renewable resource?