Which of the following statements is false fo | vedclass

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(B) $1$. $Li$ is the strongest reducing agent in aqueous solution due to its high hydration energy.$2$. The density of alkali metals generally increas

Vedclass · Accepted Answer

Density of $K$ is greater than $Na$.

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(B) $1$. $Li$ is the strongest reducing agent in aqueous solution due to its high hydration energy.$2$. The density of alkali metals generally increases down the group,but $K$ is an exception because it has a larger atomic volume than $Na$,making its density $(0.86 \ g/cm^3)$ lower than that of $Na$ $(0.97 \ g/cm^3)$. Thus,the statement that the density of $K$ is greater than $Na$ is false.$3$. $Li^+$ has the smallest ionic radius in the gas phase,but in aqueous solution,it has the largest hydrated ionic radius due to extensive hydration.$4$. All alkali metals dissolve in liquid ammonia to form deep blue,conducting,and paramagnetic solutions due to the presence of ammoniated electrons.

Column-$I$	Column-$II$
$A$. $Cs$	$1$. Apple green
$B$. $Na$	$2$. Violet
$C$. $K$	$3$. Brick red
$D$. $Ca$	$4$. Yellow
$E$. $Sr$	$5$. Crimson red
$F$. $Ba$	$6$. Blue

Which of the following statements is false for alkali metals?

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Which of the following exhibits the maximum photoelectric effect?

Match the elements given in Column-$I$ with the colour they impart to the flame given in Column-$II$.

Column-$I$ Column-$II$

$A$. $Cs$ $1$. Apple green

$B$. $Na$ $2$. Violet

$C$. $K$ $3$. Brick red

$D$. $Ca$ $4$. Yellow

$E$. $Sr$ $5$. Crimson red

$F$. $Ba$ $6$. Blue

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