If Metal A displaces Metal B from its solution, then Metal A ____.
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The number of neutrons present in a nitrogen atom is ___.
Which of the following causes damage to bridges, iron railings and all objects made of metals?
Nitrogen fixation is a process of
Isobars have _______.
Which of the following metals reacts vigorously with cold water?
Which of the following is added to iron to make iron hard and strong?
NaCl is a salt which is made up of