Which of the following species has tetrahedral geometry?

(i) BH₄ ^–

(ii) NH₂^–

(iii) CO₃^2–

(iv) H₃O⁺

<p>This is a Multiple Choice Questions as classified in NCERT Exemplar</p><p><strong>Ans:</strong> Option (i)</p><p><strong> (i)</strong> The molecule of BH₄ ^- has four bond pairs and zero lone pair of electrons, so it will be a tetrahedral molecule.</p><p><strong> (ii)</strong> NH₂ ^- has two bond pairs and two lone pairs of electrons on the nitrogen atom. So, it will have a bent geometry.</p><p><strong> (iii)</strong> CO₃ ²^- has three bond pairs and no lone pairs of electrons on carbon atoms. So, it will have a trigonal planar geometry.</p><p><strong> (iv)</strong> H₃O⁺has three bond pairs and one lone pair of electrons on oxygen atoms. So, it has a pyramidal geometry.</p>

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