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Chemistry · Classification of Elements and Periodicity in Properties
हिन्दीMatch List-I with List-II: List-I List-II A \( \text{Na}_2\text{O} \) with water I Forms a strong base \( 2\text{NaOH} \) B \( \text{Cl}_2\text{O}_7 \) with water II Forms a strong acid \( 2\text{HClO}_4 \) C Maximum covalency of Boron III Equal to \( 4 \) due to absence of \( d \)-orbitals D Oxidation state of Al in \( [\text{AlCl}(\text{H}_2\text{O})_5]^{2+} \) IV Equal to \( +3 \) while its covalency is \( 6 \) Choose the correct answer from the options given below:
Match List-I with List-II:
| List-I | List-II | ||
|---|---|---|---|
| A | \( \text{Na}_2\text{O} \) with water | I | Forms a strong base \( 2\text{NaOH} \) |
| B | \( \text{Cl}_2\text{O}_7 \) with water | II | Forms a strong acid \( 2\text{HClO}_4 \) |
| C | Maximum covalency of Boron | III | Equal to \( 4 \) due to absence of \( d \)-orbitals |
| D | Oxidation state of Al in \( [\text{AlCl}(\text{H}_2\text{O})_5]^{2+} \) | IV | Equal to \( +3 \) while its covalency is \( 6 \) |
Choose the correct answer from the options given below:
Correct answer · Option 4
A-(I), B-(II), C-(III), D-(IV)
Explanation
Basic oxides like Na2O form NaOH with water, acidic oxides like Cl2O7 form HClO4, boron has maximum covalency of 4, and Al in [AlCl(H2O)5]2+ exhibits +3 oxidation state with 6 coordinate bonds (covalency 6).
