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On keeping iron nails in copper sulphate...

On keeping iron nails in copper sulphate sulphate solution for2 hours, the colour of solution changes

A

form colourless to blue

B

from light green to blue

C

form blue to light green

D

from light green to colourless

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Rinku took 10 mL each of two solutions A and B separately in two test tubes. The solutions were in copper sulphate and zinc sulphate respectively the colours of the two solutions were

• 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 ?

Write balanced chemical equation and identify the type of chemical reaction taking place when: Iron nails dipped in blue copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.

What happens when: Iron nails are placed in a copper sulphate solution ? Write word equation of the reaction involved.

MODERN PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-EXERCISE
  1. On keeping iron nails in copper sulphate sulphate solution for2 hours...

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  2. Translate the following statements into chemical equation and balance ...

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  3. Translate the following statements into chemical equation and balance ...

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  4. Translate the following statements into chemical equation and balance ...

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  5. Translate the following statements into chemical equation and balance ...

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  6. Give the values of x and y by balancing. x KNO3 rarr y KNO2+ O2

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  7. Give the values of x and y by balancing. x HCL +O3 rarr y H2O +2Cl2

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  8. Balance the following chemical equation: KClO3 rarr KCl+O2

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  9. Balance the following equations: Al+H2SO4 rarr Al2(SO4)3+H2

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  10. Balance the following chemical equation: H2+N2 rarr NH3

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  11. Balance the following equations: C6H6+O2 rarr CO2+ H2O

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  12. Balance the following equations: Fe2O3+C rarr Fe+CO

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  13. Balance the following chemical equation: NaOH+H2SO4rarrNa2SO4+H2O

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  14. Balance the following equation : CH4(g) +O2(g) rarr CO2 (g)+H2O(l)

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  15. Balance the following equation : Ba(OH)2+ HBr (aq) rarr BaBr2 (aq) +...

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  16. Balance the following equation : Al(s) +HCl(aq) rarr AlCl2(aq)+H2(g)

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  17. Balance the following equation : KCN (aq) +H2SO4(aq) rarr K2SO4(aq)+...

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  18. Which of the following are balanced equations: 2H2+O2 rarr H2O

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  19. Balance the following equations: C6H6+O2 rarr CO2+ H2O

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  20. Balance the following equations: C6H6+O2 rarr CO2+ H2O

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  21. Which of the following equations are balanced? 2HgO gives 2Hg + Oxyg...

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