Which of the following is an amphoteric oxide?
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Except Helium, all noble gases have how many electrons in the outermost shell?
What is the full form of PVC?
Which of the following is not a greenhouse gas?
The pH value increase from 7 to 14 represents a
Which of the following is a CORRECT statement?
The maximum number of electrons that can be accommodated in M shell is
Which of the following is called Aurum?