Question

7. State your observations when :
(a) a piece of sodium is dropped into water; (b) cobalt chloride paper is
moistened; (c) calcium is added to water; (d) anhydrous copper sulphate is
dissolved in water; (e) ferric chloride is kept in the open; (f) crystals of washing
soda are kept in the open; (g) crystals of copper sulphate are kept exposed
to the atmosphere; (h) a bottle of concentrated sulphuric acid is kept open.​

Answer 1

option A is the answer

apiece of sodium