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When phenolphthalein is added to an aque...

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.

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CHHAYA PUBLICATION-SOME p-BLOCK ELEMENTS-SHORT -TYPE QUESTIONS
  1. Metallic aluminium is frequently used as a reducing agent in the extra...

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  2. Is boric acid a protonic acid? Explain.

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  3. When phenolphthalein is added to an aqueous solution of borax, the sol...

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  4. Explain why diamond is hard but graphite is soft.

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  5. Graphite is a conductor of electricity but diamond is not-why?

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  6. Explain why carbon monoxide is a poisonous gas.

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  7. SiCl4 undergoes easy hydrolysis but C Cl4 does not undergo hydrolysis-...

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  8. CO2 gets absorbed in alkaline solution but CO does not under ordinary ...

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  9. CO is a superior fuel-why?

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  10. How will you get pure nickel using carbon monoxide?

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  11. Explain why solid carbon dioxide is called dry ice.

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  12. Give example: Two solids combine to give a liquid.

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  13. Explain why diamond appears to be very bright and lustrous.

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  14. (SiH3)3N is weaker base than (CH3)3N- why ?

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  15. CO cannot be dried by concentrated sulphuric acid -why?

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  16. N(CH3)3 is pyramidal but N (SiH3)3 is planar-explain.

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  17. Carbon exhibits catenation property but lead does not-why?

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  18. Which are called methanides?

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  19. (CH3)3SiOH is more acidic than (CH3)3COH, even though carbon is more e...

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  20. Silicon is unable to form structure like graphite-why?

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