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Conductivity MP BP and Electronegativity (Group 2)

Consider the ...

Question

Consider the following statements and arrange in the order of true/false as given in the codes.
$S_{1}$ : Sodium amalgam reacts with hot water and produces sodium hydroxide and hydrogen gas.
$S_{2}$ : Sodium is more reactive than potassium.
$S_{3}$ : Alkaline earth metals dissolve in liquid ammonia to give deep blue-black solutions which are conducting.
$S_{4}$ : Alkaline earth metal salts have more number of water molecules as compared to those of alkali metal salts.

A

TTFF

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B

TFTT

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C

FTTF

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D

TFFT

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Solution

The correct option is B TFTT
On moving down the group, the group atomic size increases and the effective nuclear charge decreases.
Because of this factor, the outermost electron in potassium can be lost easily as compared to sodium. Hence, potassium is more reactive than sodium. S1, S3, S4 are all true

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