How many pair of heart is found in an earthworm?

The term Fire Ice is used for ___?

Carbohydrates are organic compounds composed of which elements? 

Which statements correctly describe Phosphoric Acid?

(I) Phosphoric Acid is a corrosive, colorless, odorless, and inorganic acid.

Which method is employed to separate minor quantities of multiple dissolved solids in a solution?

Which material is used as a moderator in a nuclear power plant that slows down the neutrons and makes them fit for causing fission?

Which sodium compound is the most popular additive in sauces, salad dressings, and beverages for its preservative action?

Petroleum is a mixture of-

Manganite is an ore/mineral of

What is the common name of the compound with the formula C6H5NH2?

The mine explosions are mostly caused by the combination of air with which gas?