NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313823
Which of the following compounds has the lowest melting point?
1 \({\rm{Ca}}{{\rm{F}}_{\rm{2}}}\)
2 \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{CaB}}{{\rm{r}}_{\rm{2}}}\)
4 \({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\)
Explanation:
\({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\) has maximum covalent character due to large size of anion and possesses lowest lattice energy. Thus, melting point is lowest.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313824
Which halide of magnesium has highest ionic character?
1 Chloride
2 Bromide
3 Iodide
4 Fluoride
Explanation:
Magnesium fluoride \(\left( {{\rm{Mg}}{{\rm{F}}_{\rm{2}}}} \right)\) has the highest ionic character. In ionic bonding, there is large electronegativity difference between two atoms, causing the bonding to be more polar have maximum ionic character. \({\rm{Mg}}{{\rm{I}}_{\rm{2}}}{\rm{ < MgB}}{{\rm{r}}_{\rm{2}}}{\rm{ < MgC}}{{\rm{l}}_{\rm{2}}}{\rm{ < Mg}}{{\rm{F}}_{\rm{2}}}{\rm{.}}\)
MHTCET - 2020
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313825
Which of the following has least covalent P-H bond?
1 \({\rm{P}}{{\rm{H}}_{\rm{3}}}\)
2 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{6}}}\)
3 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\)
4 \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\)
Explanation:
Due to the +ve charge on P, it attracts the electrons of the P-H bond towards itself. As a result, it has some ionic character. In other words, the P-H bond in \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\) is least covalent.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313826
Which of the following metal halide is more covalent?
1 \({\rm{SnC}}{{\rm{l}}_{\rm{2}}}\)
2 \({\rm{PbC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{SbC}}{{\rm{l}}_{\rm{3}}}\)
4 \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\)
Explanation:
\({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\) metal halide is more covalent than other given options. It can be expalined on the basis of Fajan’s rule. Higher the charge on the cation, greater is its polarising power. In \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\), Antimony (Sb) is in +5 oxidation state. It has maximum polarising power. Hence, possess higher covalent character.
313823
Which of the following compounds has the lowest melting point?
1 \({\rm{Ca}}{{\rm{F}}_{\rm{2}}}\)
2 \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{CaB}}{{\rm{r}}_{\rm{2}}}\)
4 \({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\)
Explanation:
\({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\) has maximum covalent character due to large size of anion and possesses lowest lattice energy. Thus, melting point is lowest.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313824
Which halide of magnesium has highest ionic character?
1 Chloride
2 Bromide
3 Iodide
4 Fluoride
Explanation:
Magnesium fluoride \(\left( {{\rm{Mg}}{{\rm{F}}_{\rm{2}}}} \right)\) has the highest ionic character. In ionic bonding, there is large electronegativity difference between two atoms, causing the bonding to be more polar have maximum ionic character. \({\rm{Mg}}{{\rm{I}}_{\rm{2}}}{\rm{ < MgB}}{{\rm{r}}_{\rm{2}}}{\rm{ < MgC}}{{\rm{l}}_{\rm{2}}}{\rm{ < Mg}}{{\rm{F}}_{\rm{2}}}{\rm{.}}\)
MHTCET - 2020
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313825
Which of the following has least covalent P-H bond?
1 \({\rm{P}}{{\rm{H}}_{\rm{3}}}\)
2 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{6}}}\)
3 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\)
4 \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\)
Explanation:
Due to the +ve charge on P, it attracts the electrons of the P-H bond towards itself. As a result, it has some ionic character. In other words, the P-H bond in \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\) is least covalent.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313826
Which of the following metal halide is more covalent?
1 \({\rm{SnC}}{{\rm{l}}_{\rm{2}}}\)
2 \({\rm{PbC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{SbC}}{{\rm{l}}_{\rm{3}}}\)
4 \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\)
Explanation:
\({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\) metal halide is more covalent than other given options. It can be expalined on the basis of Fajan’s rule. Higher the charge on the cation, greater is its polarising power. In \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\), Antimony (Sb) is in +5 oxidation state. It has maximum polarising power. Hence, possess higher covalent character.
313823
Which of the following compounds has the lowest melting point?
1 \({\rm{Ca}}{{\rm{F}}_{\rm{2}}}\)
2 \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{CaB}}{{\rm{r}}_{\rm{2}}}\)
4 \({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\)
Explanation:
\({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\) has maximum covalent character due to large size of anion and possesses lowest lattice energy. Thus, melting point is lowest.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313824
Which halide of magnesium has highest ionic character?
1 Chloride
2 Bromide
3 Iodide
4 Fluoride
Explanation:
Magnesium fluoride \(\left( {{\rm{Mg}}{{\rm{F}}_{\rm{2}}}} \right)\) has the highest ionic character. In ionic bonding, there is large electronegativity difference between two atoms, causing the bonding to be more polar have maximum ionic character. \({\rm{Mg}}{{\rm{I}}_{\rm{2}}}{\rm{ < MgB}}{{\rm{r}}_{\rm{2}}}{\rm{ < MgC}}{{\rm{l}}_{\rm{2}}}{\rm{ < Mg}}{{\rm{F}}_{\rm{2}}}{\rm{.}}\)
MHTCET - 2020
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313825
Which of the following has least covalent P-H bond?
1 \({\rm{P}}{{\rm{H}}_{\rm{3}}}\)
2 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{6}}}\)
3 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\)
4 \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\)
Explanation:
Due to the +ve charge on P, it attracts the electrons of the P-H bond towards itself. As a result, it has some ionic character. In other words, the P-H bond in \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\) is least covalent.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313826
Which of the following metal halide is more covalent?
1 \({\rm{SnC}}{{\rm{l}}_{\rm{2}}}\)
2 \({\rm{PbC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{SbC}}{{\rm{l}}_{\rm{3}}}\)
4 \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\)
Explanation:
\({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\) metal halide is more covalent than other given options. It can be expalined on the basis of Fajan’s rule. Higher the charge on the cation, greater is its polarising power. In \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\), Antimony (Sb) is in +5 oxidation state. It has maximum polarising power. Hence, possess higher covalent character.
313823
Which of the following compounds has the lowest melting point?
1 \({\rm{Ca}}{{\rm{F}}_{\rm{2}}}\)
2 \({\rm{CaC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{CaB}}{{\rm{r}}_{\rm{2}}}\)
4 \({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\)
Explanation:
\({\rm{Ca}}{{\rm{l}}_{\rm{2}}}\) has maximum covalent character due to large size of anion and possesses lowest lattice energy. Thus, melting point is lowest.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313824
Which halide of magnesium has highest ionic character?
1 Chloride
2 Bromide
3 Iodide
4 Fluoride
Explanation:
Magnesium fluoride \(\left( {{\rm{Mg}}{{\rm{F}}_{\rm{2}}}} \right)\) has the highest ionic character. In ionic bonding, there is large electronegativity difference between two atoms, causing the bonding to be more polar have maximum ionic character. \({\rm{Mg}}{{\rm{I}}_{\rm{2}}}{\rm{ < MgB}}{{\rm{r}}_{\rm{2}}}{\rm{ < MgC}}{{\rm{l}}_{\rm{2}}}{\rm{ < Mg}}{{\rm{F}}_{\rm{2}}}{\rm{.}}\)
MHTCET - 2020
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313825
Which of the following has least covalent P-H bond?
1 \({\rm{P}}{{\rm{H}}_{\rm{3}}}\)
2 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{6}}}\)
3 \({{\rm{P}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\)
4 \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\)
Explanation:
Due to the +ve charge on P, it attracts the electrons of the P-H bond towards itself. As a result, it has some ionic character. In other words, the P-H bond in \({\rm{PH}}_{\rm{6}}^{\rm{ + }}\) is least covalent.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313826
Which of the following metal halide is more covalent?
1 \({\rm{SnC}}{{\rm{l}}_{\rm{2}}}\)
2 \({\rm{PbC}}{{\rm{l}}_{\rm{2}}}\)
3 \({\rm{SbC}}{{\rm{l}}_{\rm{3}}}\)
4 \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\)
Explanation:
\({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\) metal halide is more covalent than other given options. It can be expalined on the basis of Fajan’s rule. Higher the charge on the cation, greater is its polarising power. In \({\rm{SbC}}{{\rm{l}}_{\rm{5}}}\), Antimony (Sb) is in +5 oxidation state. It has maximum polarising power. Hence, possess higher covalent character.
