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Explain the phenomenon : "When phenolphe...

Explain the phenomenon : "When phenolphethaline is added to aqueous solution of Borax the colour of the solution changed to pink which is again turn colourless if glycerol is added to it

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When mercuric iodide is added to aqueous solution of KI:

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When phenolphthalein is added to an aqueous solution of borax, the solution becomes pink in colour. However, when glycerol is added to the solution, it becomes colourless again. Explain.

Is aqueous solution of Borax basic ? Explain .

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PATHFINDER-SOME P-BLOCK ELEMENTS-QUESTION BANK
  1. How can borax be prepared from colemanite ?

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  2. Write the correct formula of borax and structure of it's anion.

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  3. Explain the phenomenon : "When phenolphethaline is added to aqueous so...

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  4. What is the shape of BO3^(-3) ion ?

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  5. How will BCI3 and CCI4 will react with water ?

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  6. What is the type of hybridisation of Boron in diborane ?

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  7. Give reasons Conc. HNO3 can be transported in aluminium container.

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  8. Give reasons Graphite is used as lubricant.

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  9. Give reasons Aluminium utensils should not be kept in water overnigh...

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  10. Give reasons CCl4 is used in fire extinguisher.

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  11. Give reasons Stannous chloride and Ferric chloride cannot be kept in...

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  12. Write balanced equation for the following BF3+LiHrarr

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  13. Write balanced equation for the following B2H6+H2Orarr

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  14. Write balanced equation for the following NaH+B2H6rarr

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  15. Write balanced equation for the following B2H6+ NH3rarr

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  16. Write balanced equation for the following Al4C3+12H2Orarr

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  17. Identify A,B, C, D in the following reactions.

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  18. What happens when silica is treated with HF ? Give equation.

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  19. A metal 'X' on treatment with NaOH forms a white precipitate (A) which...

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  20. Explain: Silicon forms Si F6^(2-) but corresponding fluoro compound ...

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