Choose the sentence that has incorrect form of words:

Urea is a —

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

In addition to hydrogen the other abundant element present on Sunsurface is

The total energy of revolving electron in an atom 

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

When Hydrogen starts burning in air it produces?

Which of the following is an iron ore ? 

Which one of the following elements is used in the manufacture of fertilizers?

Which of the following is the major constituent of LPG? 

The element used for making solar cells is