Oxide of which of the following will turn red litmus blue?
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Electrons in the highest energy level of an atom are called ________.
Which of the following elements has the lowest melting point?
Which drug is used for Pain Relief?
Which one of the following is a cation?
_____ is produced from incomplete burning of fuels such as petrol and diesel.
Name the noble gas which is placed in the third period and eighth group of the Modern Periodic table.
Pentane has _____ structural isomers.
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