Analyst Questions

Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment.

Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. This removes material that will either float or readily settle out by gravity. It includes the physical processes of screening, comminution, grit removal, and sedimentation.

Secondary treatment removes the soluble organic matter that escapes primary treatment. It also removes more of the suspended solids. Removal is usually accomplished by biological processes in which microbes consume the organic impurities as food, converting them into carbon dioxide, water, and energy for their own growth and reproduction.

Tertiary treatment includes removal of nutrients such as phosphorus and nitrogen and practically all suspended and organic matter from waste water.

India's rank in the latest ICC One Day International Rankings is Second. England tops the list followed by India, South Africa, New Zealand, Pakistan, Australia in the list.

Whereas India's rank in the latest ICC Test International Rankings is First followed by South Africa and England in 2nd and 3rd places.

A rotating column of air is called as a Tornado which extends from the thunderstorm to the ground.

An approach to studying biology that aims to model the dynamic behavior of whole biological systems based on a study of the interactions among the system's parts.

Here in the option B) H2SO4 - Sulfuric acid is reacting with sodium hydroxide (NaOH), a base to produce a salt (Sodium Sulfate), and water (H2O). This is characteristic of of acid-base neutralization reactions.

Venus planet is known as the Morning Star or the Evening Star.

National Housing Bank is a wholly subsidiary of RBI - Reserve Bank of India.