Assertion: In general,transition metals have | vedclass

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Question

(A) The transition metals (with the exception of $Zn$,$Cd$,and $Hg$) are very hard and have low volatility. Their melting and boiling points are high.

Vedclass · Accepted Answer

Assertion is true,Reason is true and Reason is the correct explanation for Assertion

Vedclass · Answer

(A) The transition metals (with the exception of $Zn$,$Cd$,and $Hg$) are very hard and have low volatility. Their melting and boiling points are high. The high melting points of these metals are attributed to the involvement of a greater number of electrons from $(n-1)d$ orbitals in addition to the $ns$ electrons in the interatomic metallic bonding. Since more electrons participate in metallic bonding,the strength of the metallic bond increases,leading to higher melting points. Thus,the Assertion is true and the Reason is the correct explanation for the Assertion.

List-$I$ (Elements)	List-$II$ (Group)
$A$. $Mn, Tc, Re$	$IV$. $7$
$B$. $Zn, Cd, Hg$	$I$. $12$
$C$. $Ti, Zr, Hf$	$II$. $4$
$D$. $Ga, In, Tl$	$V$. $13$

Assertion: In general,transition metals have high melting points.
Reason: More number of electrons from $(n-1)d$ and $ns$ are involved in interatomic metallic bonding.
The correct option among the following is

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Match the following elements in List-$I$ with their respective groups in List-$II$.
List-$I$ (Elements) List-$II$ (Group)
$A$. $Mn, Tc, Re$ $IV$. $7$
$B$. $Zn, Cd, Hg$ $I$. $12$
$C$. $Ti, Zr, Hf$ $II$. $4$
$D$. $Ga, In, Tl$ $V$. $13$

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Assertion: In general,transition metals have high melting points.Reason: More number of electrons from $(n-1)d$ and $ns$ are involved in interatomic metallic bonding.The correct option among the following is