Assignment 7 Metals And Non Metals
Std 10th Test
Name of the student: *
Explain the process of electrolytic refining. *
What is corrosion?
Name a reducing agent that may be used to obtain manganese from manganese dioxide. *
Why sodium chloride has a high melting point? *
Name the anode and cathode used in electrolytic refining of impure copper metal. *
Why are ionic compounds usually hard? How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state? *
A metal ‘X’ acquires a green colour coating on its surface on exposure to air. (i) Identify the metal ‘X’ and name the process responsible for this change. (ii)Name and write chemical formula of the green coating formed on the metal. (iii) List two important methods to prevent the process. *
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