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Q.27 Represent the following compounds by Lewis dot structure and dash structure. 

(i) CCI4   (ii) H2O   (iii) CO2

Q.28 Explain the diagonal relationship between lithium and magnesium.
Explain why sodium is more useful then potassium.
What happens  when magnesium is burnt in air.


Why does lithium shows anomalous nature ? Describe the importance of sodium hydroxide and sodium chloride. 


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