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State the reason for the following : C...

State the reason for the following :
Calcium does not occur in free state in nature.

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**Step-by-Step Solution:** 1. **Understanding Calcium's Properties:** - Calcium is an alkaline earth metal with the atomic number 20. Its electronic configuration is [Ar] 4s², indicating it has two electrons in its outermost shell. 2. **Reactivity of Calcium:** - Calcium is known to be highly reactive, especially with oxygen and water. This high reactivity is a characteristic of alkaline earth metals. ...
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State the reason why (i) carbon is not used to reduce the oxides of sodium or aluminium. (ii) an iron strip dipped in a blue copper sulphate solution turns the blue solution to pale green. (iii) calcium does not occur in free state in nature. (iv) zinc is used in the galvanisation of iron and not copper.

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OSWAL PUBLICATION-METALS AND NON-METALS-Board corner(Long answer type questions)
  1. Metal X is found in nature as its sulphide XS. It is used in the galva...

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  2. State the reason for the following : Aluminium oxide is called an am...

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  3. State the reason for the following : An iron strip dipped in a blue ...

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  4. State reasons for the following : (i) Aluminium oxide is called an a...

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  5. State the reason for the following : Calcium does not occur in free ...

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  6. State the reason for the following : Sodium or potassium metals are ...

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  7. How will you show experimentally that metals are good conductors of he...

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  8. Describe the extraction of Mercury metal from its ore Cinnabar (HgS).

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  9. What is reactivity series? How does the reactivity series of metals he...

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  10. (a) What is reactivity series ? How does the reactivity series of meta...

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  11. List in tabular form three chemical properties on the basis of which w...

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  12. Give reasons for the following: Most metals conduct electricity wel...

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  13. Give reasons for the following: The reaction of iron (III) oxide [Fe...

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  14. Write chemical equations for the following reactions: Calcium metal ...

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  15. Write balanced chemical equations for the following reaction Cinnaba...

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  16. Write chemical equations for the following reactions: Manganese diox...

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  17. What are alloys? List two properties of alloys.

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  18. Write the steps involved in the extraction of pure metals in the middl...

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  19. (a) White the steps involved in the extraction of pure metals in th...

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  20. Draw labelled diagram for the electrolytic refining of copper.

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