Question

3. X’abrown coloured shining element with atomic number one unit grater than Ni when burnt in
air, turns black. What is 'X'? What is
the black coloured substance?
31
SALE-2016
2
2
I, + KNO3
elanced equation
Hg(NO3)2 +KI → HgI2 +KNO3
047
TXPSM
CHEMICAL EQUATIONS​

Answer 1

The shinny brown colored element 'X' is copper. When it is heated in air, it becomes black due to the deposit of copper oxide.

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