Question

What are the similarities and differences in observations when iodine crystals and ammonium chloride crystals are separately heated in a dry test tube?​

Answer 1

ANSWER

(i) When Iodine crystals are heated, the van der Waals forces are easily overcome and the molecule breaks into the gas phase. They sublime and form a purple colored dense vapor.

(ii) When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO

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) there takes reaction between them and copper sulphate changes its color from blue to light green. This shows Iron is more reactive than Copper, it can replace Copper from CuSO

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