Question

34. An element X has electronic configuration 2, 8, 1 and another element Y has electronic configuration 2, 8, 7.
They form a compound Z. The property that is not exhibited by Z is
A) it has high melting point
B) it is a good conductor of electricity in its pure solid state
C) it breaks into pieces when beaten with hammer
D) it is soluble in water

Answer 1

Answer:

The compound Z formed after reaction with element X and element Y will not exhibit the property of being a good conductor of electricity in its pure solid state.

Explanation:

• The electronic configuration of element X is 2,8,1 so the atomic number will be 11 and the element X is Sodium.
• For element Y, the electronic configuration is 2,8,7 and the atomic number would be 17. Therefore, the given element Y is Chlorine.
• Sodium (Na) on reaction with chlorine (Cl) , forms an ionic compound Sodium chloride (NaCl) which is generally solid in nature.
• Sodium Chloride does not conduct electricity in the pure solid state as ions are not free for movement in solid state.

Answer 2

Answer:

The property that is not exhibited by Z

is a good conductor of electricity in its pure solid state