Answer:Hg
Answer:All transition elements dissolves in acid
Answer: Cr, Cu
Answer: Magnitude of ionisation enthalpy
Answer: FeSO4
Answer:Co-ordination covalent bond is not directional
Answer:Difference in atomic radii should be less than 15%
Answer:15%
Answer:the difference in their atomic volume is less than 2%
Answer:134 pm 117 pm
Answer: As decolouring agent in textile industry