Question

The reaction between X and Y, forms compound Z, X loses an electron and Y gains an electron which of the following properties is NOT shown by Z?
A. Has high melting point
B. Has low melting point
C. Conduct electricity in molten state
D. Occurs as solid

Answer 1

Hint: In this question it is given that X loses electron means it behaves as an electropositive element where Y behaves as a non-metal because it gains an electron and as we know that when two opposite charges comes together due to attraction, ionic bond or electrovalent bond is formed. Check the characteristic features of ionic compounds.

Complete answer:
From your chemistry lessons you have learned about the chemical bonds and ionic bond formation between two opposite charges and about their characteristic features.
Chemical bonds are formed between two atoms due to the complete transfer of one or more then one electrons from one atom to another atom so it can attain their nearest inert gas configuration. Chemical bonds are of three types among them one is ionic bond in which donating and accepting one electron takes place to complete their octet.
Ionic bond or electrovalent bond is a type of bond which forms between two oppositely charged ions due to electrostatic force of attraction between them or we can say that is a type of bond formed when one atom loses electrons and another atom gains electrons. And the compound which is formed due to ionic bonding is known as ionic compound.
Now, let us know about some of the properties of ionic bond that are:
a. Ionic bonds are the strongest among all the bonds
b. Molecules with ionic bond have high boiling and ,melting point
c. Ionic bonded molecules are good conductors of electricity in their molten state or aqueous Solution.
d. ionic compounds are solid
In the question it is given that X is losing electrons i.e. behaves as electropositive metal and Y gains electrons i.e. behaves as a non-metal and the compound d Z is formed which will ion due to formation of ionic bond between X and Y.
Hence the incorrect one will be (B) because ionic compounds have a high melting point.

Thus the correct option will be (B).

Note:
Ionic bond is the most reactive of all the bonds because ionic bond has charge separation.
Other types of covalent bonds are covalent and coordinate. In covalent bond there is equal sharing of electrons between the two atoms and this bond is formed between atoms with small electronegativity difference while ionic bond is formed between atoms with large electronegativity differences.