Statement I : Sodium metal is stored in keroseneStatement II : The density of sodium is less than water

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Statement I and II are correct and II explains I

Statement I and II are correct and II does not explain I

Statement I is correct and Statement - II is incorrect

Both statement - I and II are incorrect

answer is B.

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Detailed Solution

All alkalimetal are stored in keroseneReason : Due to their high reactivity with water (or) atmospheric moisture we can't store them in water.Na + H2O → NaOH + 1/2H2↑ + ΔAnd the above reaction is highly exothermic in natureTherefore inorder to avoid the above reaction we need to store them in kerosene [inert]→ But in the case of "Li" ,Due to its low density it floats on the surface of kerosene,that means it exposes to atomsheric air, therefore the Li metal will be stored in kerosene by wrapping with paraffin wax material→ Density : Na< H2OTherefore Statement - I & Statement - II are correct

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