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Sodium metal is kept under kerosene. Exp...

Sodium metal is kept under kerosene. Explain?

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Sodium is kept in Kerosene. Why?

What are the product obtained when sodium metal is dropped in water? Explain.

Sodium is highly reactive metal. The free metal does not occur in nature, but must be prepared from compounds. What happens when sodium metal is heated in free supply of air?

What happens when (i) sodium metal is dropped in water (ii) sodium metal is heated in free supply of air (iii) sodium peroxide dissolves in water.

Metal sulphides occur mainly in rocksand metal halides in lakes and seas. Explain.

Which among the following metals is stored in kerosene? (a) Sodium (b) Iron (c ) Tangsten (d) Chromium Why is it stored in kerosene?

The group 1 metals of the periodic table of elements are collectively called alkali metals. Alkali metals are normally kept in kerosene. Why?

“Sodium cannot be kept open in atmospheric air,and cannot be stored in water. So it is stored in kerosene.” Give explanation for the above statement with its chemical equation.

Presence of excess Sodium makes NaCl crystal coloured. Explain on the basis of crystal defects.

In all metallic conductors, electric conduction is due to drifting of free electrons. But the resistivity of different metals are different. Explain the variation of resistivity with temperature.

V PUBLICATION-THE s- BLOCK ELEMENTS-QUESTION BANK
  1. Give reasons. (i )Solutions of alkali metals in liquid ammonia are blu...

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  2. Why Li2CO3 decomposes at lower temperature whereas Na2CO3 at higher te...

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  3. Sodium metal is kept under kerosene. Explain?

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  4. A piece of magnesium is burned in air. Which are the reactants here ...

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  5. BeCl2' can be easily hydrolysid. Explain?

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  6. Why does magnesium has a higher ionization enthalpy than sodium?

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  7. Why is it that 'BeSO4' and 'MgSO4' are soluble but 'BaSO4' is insolubl...

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  8. What is magnesia cement? Give 'its composition?

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  9. Beryllium exhibits some similarities with aluminium. Write three such ...

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  10. The energy released during the addition of an electron to an isolated ...

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  11. Why lithium forms only lithium oxide and not perioxide or superoxide?

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  12. Out of 'KOH' and 'NaOH', which is stronger base and why?

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  13. Potassium carbonate cannot be prepared by Solvay process. Why?

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  14. Why an aqueous solution of sodium carbonate is'alkaline?

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  15. What is fly ash?

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  16. compound of calcium is used in hospitals for setting fracture of bones...

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  17. Give the chemical formula of dolomite and carnallite?

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  18. Sodium fire in the laboratory should not be extinguished by pouring wa...

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  19. Give reasons. (i )Solutions of alkali metals in liquid ammonia are blu...

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  20. Why does table salt get wet in rainy season?

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