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An iron nail is suspended in copper sulp...

An iron nail is suspended in copper sulphate solution are kept for a while. It is observed that the solution.

A

Remains blue and a coating is formed on the nail

B

Turns green and a coating is found on the nail

C

Remains blue and no coating is formed on the nail

D

Turns green no coating is found on the nail

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• Take three iron nails and clean them by rubbing with sand paper. • Take two test tubes marked as (A) and (B). In each test | tube, take about 10 ml copper sulphate solution. • Tie two iron nails with a thread and immerse them 'carefully in the copper sulphate solution in test tube B for about 20 minutes [Fig. (a)]. Keep one iron nail aside for comparison. • After 20 minutes, take out the iron nails from the copper sulphate solution. • Compare the intensity of the blue colour of copper sulphate solutions in test tubes (A) and (B) (Fig. (b)]. Also, compare the colour of the iron nails dipped in the copper sulphate solution with the one kept aside [Fig. - (b)]. On the basis of activity , give the answers of th following questions : What is the colour of copper sulphat solution in test tube A ?

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MODERN PUBLICATION-METALS AND NON-METALS-EXERCISE
  1. Solutions of copper sulphate, iron sulphate and zinc sulphate are prep...

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  2. A thin plate of zinc metal is placed in a beaker containing aqueous fe...

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  3. An iron nail is suspended in copper sulphate solution are kept for a w...

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  4. Complete the following:

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  5. Rekha took two solutions, 10 mL each separately in two test tubes, A a...

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  6. A chemistry lab-incharge kept zinc metal in FeSO4 solution and observe...

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  7. Madhurima added a few iron fillings to 5 mL of aluminium sulphate Al2(...

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  8. Rinku took 10 mL each of two solutions A and B separately in two test ...

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  9. Raman took three metals labelled P,Q and R. He carried out displacemen...

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  10. Which of the following is . The colour of the FeSO4 solutoin would be

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  11. Rashmi added aluminium metal to colourless soluton of zinc sulphate. A...

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  12. Fill in the blanks:

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  13. If iron nails are added in zinc sulphate solution, the possible observ...

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  14. Which of the following statements are correct: Aluminium can displace ...

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  15. Four test tubed marked I,II,III and IV were taken 20 ml of Al2(SO4)3 s...

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  16. Why does calcium metal after reacting with water starts floating on i...

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  17. Write chemical equations for the following: Lead carbonate is calcined...

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  18. Write chemical equations for the following: Chromium oxide is heated w...

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  19. Write chemical equations for the rection on Zn granules with dil H2SO4...

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  20. Write chemical equations for the rection on Zn granules with Sodium h...

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