(e) What do you observe when: (i) Iodine crystals are heated in a test tube? (ii) Iron nails are added to copper sulphate solution? (iii) Lead nitrate crystals are heated strongly? (iv) Ferric chloride crystals are exposed to atmosphere for some time? (v) Blue copper sulphate crystals are heated?
Answers
Answer:
1. when iodine crystals are heated the ven dar walls are easily overcome and the molecules break into to gas phase. The sublime and form a purple coloured dense vapour.
2. when when iron nails is dipped in copper sulphate there takes reaction between them and copper sulphate changes its colour from Blue to light green
3. when we heat crystals of lead nitrate we can see reddish-brown vapours and lead nitrate decomposes to lead oxide Oxygen and nitrogen dioxide.
4. when ferric chloride crystals are are exposed to atmosphere for sometime then it reacts with moisture and forms ferrous oxide and HCL in gaseous form.
5. when blue copper sulphate crystals are heated they lose water of crystallization and blue colour of CuSo4 changes to white.
Answer:
Explanation:
1. when iodine crystals are heated the ven dar walls are easily overcome and the molecules break into to gas phase. The sublime and form a purple coloured dense vapour.
2. when when iron nails is dipped in copper sulphate there takes reaction between them and copper sulphate changes its colour from Blue to light green
3. when we heat crystals of lead nitrate we can see reddish-brown vapours and lead nitrate decomposes to lead oxide Oxygen and nitrogen dioxide.
4. when ferric chloride crystals are are exposed to atmosphere for sometime then it reacts with moisture and forms ferrous oxide and HCL in gaseous form.
5. when blue copper sulphate crystals are heated they lose water of crystallization and blue colour of CuSo4 changes to white.
Please give 5 star rating and click on thanks!!!