Which of the following rules must be followed | vedclass

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(A) An alloy is a solid solution of two or more metals or a metal and a non-metal. For the formation of substitutional solid solutions (alloys),the fo

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The difference in atomic radii should not be more than $15\%$.

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(A) An alloy is a solid solution of two or more metals or a metal and a non-metal. For the formation of substitutional solid solutions (alloys),the following conditions are generally required:$1$. The atomic radii of the components should not differ by more than $15\%$.$2$. The crystal structures of the components should be similar.$3$. The valence shell electronic configurations should be similar.$4$. The electronegativity difference should be small.Therefore,the correct rule is that the difference in atomic radii should not be more than $15\%$.

List-$I$	List-$II$
$A$. Oxidation state of $Mn$ in $MnO_2$	$i$. $+2$
$B$. Most stable oxidation state of $Mn$	$ii$. $+3$
$C$. Maximum stable oxidation state of $Mn$ in oxides	$iii$. $+4$
$D$. Characteristic oxidation state of Lanthanoids	$iv$. $+5$
	$v$. $+7$

Which of the following rules must be followed to form an alloy?

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