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State reasons :CF6^(2-) does not form bu...

State reasons :`CF_6^(2-)` does not form but `SiF_6^(2-)` forms write Chemical for rule of ‘Borax.

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State reason : BH_3 forms dimer.

[SiF_6]^(2-) is known but [SiCI_6]^(2-) is not. Give reasons.

[SiF_6]^(2-) exists while [SiCl_6]^(2-) does not. Explain ?

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UNITED BOOK HOUSE-MODEL QUESTION PAPER 20-EXERCISE
  1. Find the increasing order of covalent nature of AlCl3, MgCl2 and NaCl....

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  2. Define Co-efficient of Viscosity of a liquid. Write its S.I Unit.

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  3. Calculate q, w & Delta uwhen a gas is Compressed from 15 lit to 5 lit ...

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  4. Write Hess's law of constant heat summation. Write the mathematical ex...

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  5. Balance the following reaction by oxidation no method H2O + HNO2 rarr...

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  6. Balance the following reaction by oxidation no method Cu + NO ---> CuO...

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  7. Balance the following reaction by oxidation no method FeCl3+ SnCl2 ra...

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  8. State one method to remove permanent hardnessof water. Why H2S is a ga...

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  9. Why Csl is lesssoluble in water? Whatis used as anode in the extractio...

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  10. How N2 is estimated in Duma’s process.

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  11. What is self Catalysis? Write Arrheneous equ for the specific rate con...

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  12. Write ostwald dilution law 1 what is buffer solution? State with examp...

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  13. Boric acid is a weak acid, but in presence of Glycerol, it acts as a s...

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  14. State reasons :CF6^(2-) does not form but SiF6^(2-) forms write Chemic...

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  15. What happens when:LiBH4 is reacted with BF3 in dry ether medium.What i...

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  16. What happens when:CO2 gas is passed through BaO2 Suspension in water.W...

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  17. What is Ziegler natta Catalyst? State one use of it. State with exampl...

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  18. How would you differ,Chemically ethane & ethylene.

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  19. How would you differ,Propyne & acetylene.

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  20. What is P-2 Catalyst?

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