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When urea is added to water the freezing...

When urea is added to water the freezing point decreases. Explain why.

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UNITED BOOK HOUSE-HIGHER SECONDARY EXAMINATION 2017-EXERCISE
  1. Write the appropriate Nernst equation for the following half-cell reac...

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  2. Write down the van't Hoff equation for osmotic pressure of a solution....

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  3. When urea is added to water the freezing point decreases. Explain why.

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  4. A U-tube is completely filled with Fe(OH)3 sol and a potential differe...

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  5. Define heterogeneous catalysis with an example.

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  6. How will you distinguish chemically between HN3 and HN3 ?

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  7. Writ down the balanced chemcial equation for the reaction of H2S with ...

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  8. Explain why Cu(NH(3))4]^(2+) ion is coloured but [Cu(CN)4]^(3-) ion is...

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  9. What are the two monomer units of terylene? Write the repeating unit o...

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  10. What is the ferromagnetic substance?

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  11. KBr crystallises in face-centered cubic (fcc) crystals. The density an...

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  12. Which kind of defect in ionic crystals does not alter the density ?

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  13. An element X has atomic mass 60 g mol^(-1) and density 6.23 g cm^(-3)....

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  14. 20 g of a solid solute is dissolved in 180 g of water. At 100^(@)C the...

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  15. What is the fuel cell? Write down anodic reaction and cathodic reactio...

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  16. Define specific conductivity ?

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  17. A current of 35 ampere is passed through acidulated water for 5 minute...

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  18. Write self-reduction process with balanced chemical reaction in the ex...

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  19. A green oxide of chromium(A), on fusion with KOH and KNO3 gives a yell...

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  20. Comparing La(OH)(3) and Lu(OH)(3), which is more basic and explain why...

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