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An electric iron has a heating element made of :
An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :
An element found in all organic compounds is
An element of atomic no. 29 belongs to
An element that can form a pentoxide is
An element that does not occur in nature but can be produced artificially is
An example of a cross-linked polymer is
An important green-house gas other than methane being produced from the agricultural fields is
Antacid tablets consist of
Any P-orbital can accommodate up to