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If same mass of liquid water and a piec...

If same mass of liquid water and a piece of ice is taken, then why is the density of ice less than that of liquied water ?

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Since water expands on freezing, therefore, volume of ice for the same mass of water is more than liquid water. Hence mase per unit volume i.e., density of ice is lower than liquid water.
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MODERN PUBLICATION-HYDROGEN-NCERT FILE (NCERT EXEMPLAR PROBLEMS) (Short Answer Question)
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  2. Name the classes of hydrides to which H(2)O, B(2)H(6) and NaH belo...

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  3. If same mass of liquid water and a piece of ice is taken, then why...

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  4. Complete the following equations (i) PbS(s) +H(2)O(2) (aq) to ...

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  5. Given reasons (i) Lakes freeze form top towards bottom. (ii) Ice ...

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  6. What do you understand by the term 'auto-protolysis' of water? What is...

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  7. Dicuss briefly de- mineralistion of water by ion exchange resin.

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  8. Moleular hydrides are classified as electron deficient, electron prec...

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  9. How is heavy water prepared? Compare its physical properties with ...

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  10. Write one chemical reactions for the preparation of D(2)O(2).

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  11. Calculate the strength of 5 volume H2O2 solution. Round off answer in ...

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  12. (i) Draw the gas phase and solid phase structure of H(2)O(2). (ii...

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  13. Melting point, enthalpy of vaporisation and viscosity data of H2 O an...

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  15. Explain why HCl is a gas and HF is a liquid ?

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  16. When the first element of the periodic table is treated with diox...

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  17. Rohan heard that instructions were given to the laboratory attend...

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  18. Given reason why hydrogen resembles alkali metals ?

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  19. Hydrogen generally form covalent compounds. Give reason

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  20. Why is the ionisation enthalpy of hydrogen higher than that of sod...

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