Select the most appropriate ANTONYM of the given

Urea is a —

The gas that usually causes explosions in coal mines is

The electronic configuration of an atom having atomic number 20 is 

Which one of the following is known as the brown coal?

The element used for making solar cells is

Alcoholic (OH) group can be identified by

The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called: 

The particle required to continue the chain process of Uranium fission is:

Which of the following processes is used for the production of Biodiesel? 

When water itself combines chemically with some element or mineral it is called