Which of the following elements exhibits the | vedclass

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(A) The photoelectric effect is the emission of electrons when electromagnetic radiation,such as light,hits a material. For alkali metals,the ease of

Vedclass · Accepted Answer

$Cs$

Vedclass · Answer

(A) The photoelectric effect is the emission of electrons when electromagnetic radiation,such as light,hits a material. For alkali metals,the ease of electron emission depends on the ionization enthalpy. As we move down the group from $Li$ to $Cs$,the atomic size increases and the ionization enthalpy decreases. $Cs$ (Cesium) has the lowest ionization enthalpy among the alkali metals,making it the easiest to lose an electron when exposed to light. Therefore,$Cs$ exhibits the highest photoelectric effect.

List-$I$	List-$II$
$A$. Slaked lime	$I$. $NaOH$
$B$. Dead burnt plaster	$II$. $Ca(OH)_2$
$C$. Caustic soda	$III$. $Na_2CO_3 \cdot 10H_2O$
$D$. Washing soda	$IV$. $CaSO_4$

Which of the following elements exhibits the highest photoelectric effect?

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Match List-$I$ with List-$II$:

List-$I$ List-$II$

$A$. Slaked lime $I$. $NaOH$

$B$. Dead burnt plaster $II$. $Ca(OH)_2$

$C$. Caustic soda $III$. $Na_2CO_3 \cdot 10H_2O$

$D$. Washing soda $IV$. $CaSO_4$

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