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Give reasons A mixture of dilute NaOH ...

Give reasons
A mixture of dilute NaOH and aluminium pieces is used to open drain.

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Because hydrogen gas is evolved under pressure during the reaction
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ICSE-SELF ASSESSMENT PAPER 03-Questions
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  8. What happens when aluminium reacts with water?

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  9. Draw the Lewis structure of the following compounds: CH(3)CH(2)CH(3)

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  11. Draw the Lewis structures of the following species : H2 S

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