Question : The method of soil conservation in which stones, grass and soil are used to build barriers to collect water is called

Option 1: mulching

Option 2: contour barriers

Option 3: rock dam

Option 4: terrace farming

Question : Select the option that expresses the given sentence in active voice.
Those four pages were torn by Jack.

Option 1: Jack tears those four pages.

Option 2: Jack tore those four pages.

Option 3: Jack tear these four pages.

Option 4: Jack tore these four pages.

Question : The noble gas was used for the treatment of cancer is

Option 1: Hellium

Option 2: Argon

Option 3: Krypton

Option 4: Radon

Question : Glycol is used to manufacture which of the following?

Option 1: Nylon

Option 2: Artificial silk

Option 3: Terylene

Option 4: Rubber

Question : Which of the following devices is used to measure humidity?

Option 1: Hydrometer

Option 2: Hygrometer

Option 3: Psychrometer

Option 4: Anemometer