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State the reason:PbI4 does not exist but...

State the reason:`PbI_4` does not exist but `PbF_4` fairly stable.

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UNITED BOOK HOUSE-MODEL QUESTION PAPER 12-EXERCISE
  1. What do you mean by electronegetivity? Write its change across a perio...

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  2. Find the position of" 17A^35 in periodic table indicate whether the el...

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  3. Illustrate with example: Sp-hybridisation.

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  4. Find the hybridisation of the * marked element in the following compou...

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  5. What is the dipole moment of CCI4?

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  6. Write the Vanderwall's equation for real gas. Explain the term involve...

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  7. What do you mean by surface tension? Write its dimension. Write the S....

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  8. Calculate the entropy change of melting- of 5 gm ice. What type of fun...

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  9. DeltaH and DeltaS for a reaction at 27^@C are - 24kcal mol^(-1) & 24 c...

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  10. Balance the euqation by oxidation no method:- SnCl2 + HCl+ O3 rarr SnC...

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  11. Balance by oxidation number method Cu + HNO3 rarr Cu(NO3)2 + NO2 + H...

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  12. Balance the following reaction by oxidation number method:MnO2 + HCI ...

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  13. How would you prepare H2 O2 by electrolysis method? Is MnO2 a peroxide...

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  14. Why alkaline earth metal are respondant to flame test?

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  15. 2.4 gm of silver salt of a monobasic organic acid when heated 1.24 gm ...

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  16. What type of equilibrium 'is this 3Fe (s) + (g) f Fe3O4 (S) 4H2 (g)Di...

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  17. Why black precipital is formed when H2S is passed through Pb^(2+) & Cu...

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  18. State the reason:PbI4 does not exist but PbF4 fairly stable.

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  19. Explains why CO2 is gaseous while SiO2 is a Solid?

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  20. How would you carry out the following Conversion: .

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