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10 mL of a given solution of H(2)O(2) co...

`10 mL` of a given solution of `H_(2)O_(2)` contains `0.91 g` of `H_(2)O_(2)`. Express its strength in volume.

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`underset(68 g)(2H_(2)O_(2))to2H_(2)O+underset("22400 mL at NTP")(O_(2))`
68 g of `H_(2)O_(2)` produces 22400 mL of `O_(2)` at NTP.
`:.` 0.91 g of `H_(2)O_(2)` produces `(22400xx0.91)/68`=300 mL of `O_(2)` at NTP
Volume strength =`300/10=30`
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  8. Name the alkali metals which do not combine directly with nitrogen.

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  9. What is the order of reactivity of alkali metals towards hydrogen?

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  10. Arrange the alkali metals in increasing order of their density.

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  11. Which among Na,K,Cs and Li forms most stable hydride?

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  12. Which among Li,Na,K and Cs has density greater than water?

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  13. Arrange K,Ca and Li in order of increasing electrode potential.

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