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See-saw
Common balance
Diving board
Which among the given is an iron ore
Which among the given is biodegradable -
Which among the given is colourless
Which among the given is not a chemical action?
Which among the given is not a chemical reaction -
Which among the given is not a commercial source of energy -
Which among the given is not a donor atom
Which among the given is not a natural source of hydrocarbon
Which among the given is not a nitrogenous fetiliser -
Which among the given is not a noble gas