The P Block Elements
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Account for the following observations:
(i) AlCl3 is a Lewis acid (ii) Though fluorine is more electronegative than chlorine yet BF3 is a weaker Lewis acid than BCl3
(iii) PbO2 is a stronger oxidising agent than SnO2 (iv) The +1 oxidation state of thallium is more stable than its +3 state
Account for the following observations:
(i) AlCl3 is a Lewis acid (ii) Though fluorine is more electronegative than chlorine yet BF3 is a weaker Lewis acid than BCl3
(iii) PbO2 is a stronger oxidising agent than SnO2 (iv) The +1 oxidation state of thallium is more stable than its +3 state
This is a Long Answers Type Questions as classified in NCERT Exemplar
(i) ln? AlCl3, Aluminium is bonded to 3 chlorine atoms through three covalent bonds and six electrons are shared in the structure. To have complete Octet, AlCl3 lacks two electrons & hence act as an electron acceptor substance or
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Describe the general trends in the following properties of the elements in Groups 13 and 14.
(i) Atomic size (ii) Ionisation enthalpy (iii) Metallic character (iv) Oxidation states (v) Nature of halides
Describe the general trends in the following properties of the elements in Groups 13 and 14.
(i) Atomic size (ii) Ionisation enthalpy (iii) Metallic character (iv) Oxidation states (v) Nature of halides
This is a Long Answers Type Questions as classified in NCERT Exemplar
(i) Grp-13 The atomic size of the boron family follows the irregular trend. Generally, down the group the size increases but Gallium has a smaller atomic radius than Aluminium due to the poor shielding effect of 3d-orbitals.
Order:
Upvote Describe the general trends in the following properties of the elements in Groups 13 and 14.
(i) Atomic size
Describe the general trends in the following properties of the elements in Groups 13 and 14.
(i) Atomic size
This is a Long Answers Type Questions as classified in NCERT Exemplar
Grp-13 The atomic size of the boron family follows the irregular trend. Generally, down the group the size increases but Gallium has a smaller atomic radius than Aluminium due to the poor shielding effect of 3d-orbitals.
Order: B
Gr
Upvote 11.2. How can you explain higher stability of BCl3 as compared to TlCl3?
11.2. How can you explain higher stability of BCl3 as compared to TlCl3?
BCl3 is quite stable. Because there is absence of d- and f-electrons in boron three valence electrons (2s2 2px1) are there for bonding with chlorine atom. In Tl the valence s-electron (6s2) are experiencing maximum inert pair effect. Thus, only 6p1 electron is available for bonding. T
Upvote 11.1. Discuss the pattern of variation in the oxidation states of
(i) B to Tl and (ii) C to Pb.
11.1. Discuss the pattern of variation in the oxidation states of
(i) B to Tl and (ii) C to Pb.
(i) B to Tl
Common oxidation states are +1 and +3. The stability of +3 oxidation state decreases from B to Tl while +1 oxidation state increases from B to Tl.
(ii) C to Pb
The common oxidation states are +4 and +2. Stability of +4 oxidation state decreases from C to Pb.
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