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Four students (A),(B),(C) and (D) observ...

Four students (A),(B),(C) and (D) observed the colour and solubility of iron, sulphur and iron, sulphur and iron sulphide in carbon disulphide. The tick mark represents soluble and cross mark represents insoluble, in carbon disulphide. Their observation are tabulated below

The student who correctly reported the observations, is student :

A

A

B

B

C

C

D

D

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The correct Answer is:
D
NA
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. Four students observed the colour and odour of acetic acid and its rea...

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  2. A student takes Cu, Al, Fe and Zn piees separtely in four test tubes l...

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  3. Four students (A),(B),(C) and (D) observed the colour and solubility o...

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  4. A student adds a few drops of the universal indicator solution to a di...

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  5. A student strongly heats hydrated ferrous sulphate salt in a dry test-...

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  6. A student took four test tubes containing solutions of different colou...

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  7. A student while heating solid lead nitrate taken in a test tube would ...

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  8. Four students added a small amount of ethanoic acid to sodium hydrogen...

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  9. A student was given an unknown solution in a test tube. When he added ...

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  10. A student placed a few drops of a liquid over a portiin of the red lit...

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  11. A student was asked to carry out a chemical reaction by placing four d...

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  12. When a student added universal indicator solution to one of the follow...

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  13. A student prepared hydrogen chloride gas by treating sodium chloride w...

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  14. When a student added a few drops of barium chloride solution to sodium...

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

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

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

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

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

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

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