Question : ______ is characterized by abundant dissolved oxygen, sunlight, nutrients, generally high wave energies and water motion and in the intertidal subzone, alternating submergence and exposure.

Option 1: The Lentic Zone

Option 2: The Limnetic Zone

Option 3: The Littoral Zone

Option 4: The Benthic Zone

Question : In a mixture of 25 litres, the ratio of acid to water is 4 : 1. Another 3 litres of water is added. The ratio of acid to water in the new mixture is:

Option 1: 5 : 2

Option 2: 2 : 5

Option 3: 3 : 5

Option 4: 5 : 3

Question : What is a brine solution?

Option 1: Excess salt + water

Option 2: Silver

Option 3: Excess ethanol + water

Option 4: Excess starch + water

Question : Ozone consists of which of the following?

Option 1: Oxygen only

Option 2: Oxygen and Nitrogen

Option 3: Hydrogen and Carbon

Option 4: Oxygen and Carbon

Question : The rapidly growing mass of phytoplankton covering the surface water of a lake or pond is known as:

Option 1: eutrophication

Option 2: water bloom

Option 3: water pollution

Option 4: water hyacinth