AIIMS 2019 Chemistry Properties of Elements MCQ Question
Assertion : Among alkaline earth metals, Be predominantly forms compounds with covalent bond. Reason : Be is larger in size and hence has greater polarising power.
If both assertion and reason are true and reason is correct explanation of assertion.
If both assertion and reason are true and reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Beryllium (Be) has a small atomic size, high ionization enthalpy, and significant polarizing power, which leads it to form covalent compounds rather than ionic ones. Its ability to polarize anions results in the formation of compounds like BeCl₂ and BeH₂, where covalent character is predominant. Other options are not relevant as they do not provide any alternative explanations or examples related to Beryllium's bonding behavior. Understanding these properties helps clarify why certain elements favor covalent bonding over ionic bonding.
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