Identify the incorrect set from the following | vedclass

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(B) $1$. $SiO_2$ is a covalent network solid,which is an insulator and has a very high melting point. This is correct.$2$. $MgO$ is an ionic solid,not

Vedclass · Accepted Answer

$MgO$,covalent solid,insulator,high melting point

Vedclass · Answer

(B) $1$. $SiO_2$ is a covalent network solid,which is an insulator and has a very high melting point. This is correct.$2$. $MgO$ is an ionic solid,not a covalent solid. It consists of $Mg^{2+}$ and $O^{2-}$ ions held together by strong electrostatic forces of attraction. It is an insulator in the solid state and has a high melting point. Therefore,the description 'covalent solid' for $MgO$ is incorrect.$3$. $H_2O_{	ext{(ice)}}$ is a molecular solid held by hydrogen bonding,which is an insulator and has a low melting point. This is correct.$4$. $Ag_{(s)}$ is a metallic solid,which is a conductor of electricity and has a high melting point. This is correct.Thus,the incorrect set is $B$.

Identify the incorrect set from the following:

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