Question

Assertion: Malleability of a metal is due to the presence of metallic bond.
Reason: Metallic bond is non directional.
A) Both assertion and reason are correct and reason is the correct explanation for assertion.
B) Both assertion and reason are correct but reason is not the correct explanation of assertion.
C) Assertion is correct but reason is incorrect.
D) Both assertion and reason are incorrect.

Answer 1

Hint: The answer for this question lies in the fact that metallic bonds share the electrons with more than one atom and are non directional and because of this metals can be malleable. The answer lies here.

Complete step by step answer:
In our previous chapters of chemistry, we have come across the concepts regarding the malleability and ductility and its variation.
Now, let us see what is malleability and ductility which can help us to approach the required answer.
- Malleability is defined as the ability of substance to deform under the pressure that is stress. if the substance is malleable , then it can be flattened into thin sheets by rolling or also by hammering.
- Ductility on the other hand is when the solid stretches under a tensile strain and the material can be stretched to a wire.
Since, in the above question, the assertion is correct as the malleability is due to the presence of metallic bonds because in metallic bonds there are no localized bonds and hence metal ions can slide easily over another metal ion.
- Because of this reason, the metals can be hammered into thin sheets. Also, the electrons in metallic bonds are shared with more than one atom and this makes them non directional. But even if the reason is correct, this cannot be the correct explanation for the assertion.

Therefore, the correct answer is option B.

Note: Malleability is ability to deform under stress and ductility is the measure of ability to stretch the solid under strain.