JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
Among the statements \((I - IV),\) the correct ones are: \((I)\) \(Be\) has smaller atomic radius compared to \(Mg\) \((II)\) \(Be\) has higher ionization enthalpy than \(Al.\) \((III)\) Charge/radius ratio of \(Be\) is greater than that of \(Al\). \((IV)\) Both Be and \(Al\) form mainly covalent compounds.
- A \(( I ),( II )\) and \(( IV )\)
- B \(( II ),( III )\) and \(( IV )\)
- C \((I), (II)\) and \((III)\)
- D \((I), (III)\) and \((IV)\)
Answer & Solution
Correct Answer
(C) \((I), (II)\) and \((III)\)
Step-by-step Solution
Detailed explanation
\(I , A _{ N }: Be < Mg\) \(II\, IE : Be > Al\) \(III\) Charge/radius ratio of \(Be\) \(w\) less than that of \(Al\) \(IV\) \(Be\), \(Al\) mainly form covalent compounds
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