Question
139 + 323 β β169 + ? =
450 What will come in the place of question mark (?) in the given expression?Solution
ATQ, 139 + 323 β β169 + ? = 450 462 β 13 + ? = 450 ? = 450 β 449 ? = 1
Urea is a β
The gas that usually causes explosions in coal mines is
The electronic configuration of an atom having atomic number 20 isΒ
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:Β
The particle required to continue the chain process of Uranium fission is:
Which of the following processes is used for the production of Biodiesel?Β
When water itself combines chemically with some element or mineral it is calledΒ