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A student placed a clean iron nail in bl...

A student placed a clean iron nail in blue coloured copper sulphate solution for a considerable time. He observes that :

A

iron nail gets green coating

B

iron nail gets brown coating

C

iron nail gets no coating

D

iron nail gets blue coating

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The correct Answer is:
B
NA
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What happens when iron nails are put into copper sulphate solution?

On keeping iron nails in a blue coloured copper sulphate solution, it is observed that the colour of the solution turns light green after sometime. Give reasons for this colour change. Name the type of reaction.

A students is performing displacement reactions of metals with salt solutions. (a) In first case, the student keeps a strip of copper metal in iron (II) sulphate for a considerable time (b) In second case, the student keeps a strip of zinc metal in copper (II) sulphate solution for a consider time (i) In which case the displacement reaction will take place ? why ? (ii) In which case the displacement reaction will not take place? Why not ?

The reaction of iron nail with copper sulphate solution is ………….. Reaction.

LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. When a student added a few drops of barium chloride solution to sodium...

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  2. A student placed a pinch of solid sodium hydrogencarbonate on a strip ...

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  3. A student placed a clean iron nail in blue coloured copper sulphate so...

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  4. For students A,B,C and D were studying the effect of the solutions of ...

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  5. Which of the following solutions having same concentration will have l...

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  6. We can show that iron is more reactive than copper :

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  7. The pH of a sample of hydrochloric acid is 2. The pH of this sample wh...

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  8. Observe the given figures and choose the correct option:

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  9. When treated with diluted hydrochloric acid which of the following giv...

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  10. Which one of the following procedures is correct to detect the acidic ...

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  11. Which of the following metal strips when placed in colourless AgNO(3) ...

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  12. A small piece of aluminium metal was placed in a beaker containing a g...

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  13. A student measured the pH values of four solutions marked A,B,C and D ...

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  14. Whch of the following solutions should be put on a universal indicator...

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  15. A student took solution X in a test -tube and added a few drops of uni...

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  16. In order to study the neutralisation reaction of acid and base a stude...

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  17. In a experiment to measure the pH values of solutions, a student place...

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  18. A student was given four unknown solutions in test tubes marked A,B,C ...

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  19. When a student added red litmus to an aqueous solution, the red litmus...

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  20. A student was asked to test an unknown colourless solution with an ind...

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