Multiple Choice QuestionsAssertion : SeCl4 does not have a tetrahedral structure.
Reason : Se in SeCl4 has two lone pairs.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Molecular nitrogen is less reactive than molecular oxygen.
Reason : The bond length of N2 is shorter than that of oxygen.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Among the following, the species having square planar geometry for central atom are
(i) XeF4, (ii) SF4, (iii) [NiCl4]2- ,(iv) [PdCl4 ]2-
(i) and (iv)
(i) and (ii)
(ii) and (iii)
(iii) and (iv).
A.
(i) and (iv)
XeF4 : sp3 d2 hybridisation, shape is square planar instead of octahedral due to presence of two lone pair of electrons on Xe atom. SF4: SF4 molecule shows sp3d hybridisation but its expected trigonal bipyramidal geometry gets distorted due to presence of a lone pair of electrons and it becomes distorted tetrahedral or see-saw with the bond angles equal to 89° and 177° instead of the expected angles of 90° and 180° respectively.
Experiments have, however, shown that 4-coordinated complexes of Pd(II) are diamagnetic (n = 0). Thus it is dsp2 hybridisation which is involved in the formation of (PdCl4]2- ion i.e. 4-coordinated complexes of Pd(II) have square planar geometry with n = 0 (diamagnetic).
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