a) In the formation of compound between two atoms A and B. A loses two electrons and B gains one electron.
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11th
Chemistry
Chemical Bonding and Molecular Structure
Basics of Chemical Bonding
In the formation of compoun...
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Asked on December 27, 2019 by
Shubhra Yasmin
In the formation of compound between two atoms A and B, A looses two electrons and B gain one electron.
(a) What is the nature of bond between A and B?
(b) Explain the formation of MgCl
2
molecule.
(c) Common salt conducts electricity only in the molten state. Why?
(d) Why is melting point of NaCl high?
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ANSWER
(a) Since the bond formation involves loss and gain of electrons, the bond formed must be ionic.
(b) Formation of MgCl
2
molecule:
Mg→Mg
2+
+2e
−
2Cl+2e
−
→2Cl
−
∴Mg
2+
+2Cl
−
→MgCl
2
(c) When NaCl is melted, the ions become mobile. Due to this they can conduct electricity.
(d) Due to strong electrostatic interactions between the ions Na
+
& Cl
−
, more energy is required to break this interaction. Hence, due to this it has high melting point.