Q3 - Give reasons for the following
(i)The size of Ga is smaller than Al.
(ii)BF3 acts as Lewis acid.
(iii) CC14 does not undergo hydrolysis.
(iv)PbCl2 does not react with chlorine to form PbC14.
(v)CO is poisonous in nature. (5 Marks)
Answers
Answer:
3-i.due to poor shielding effect of 3d shell in Gallium. Explanation: ... Theatomic radius of Ga is slightly lesser than of Al because in going from Al to Ga, the electrons have already occupied 3d sub shell in Ga.
ii.BF3 acts as a Lewis acid when it accepts the lone pair of electrons that NH3 donates
iii.CCl4 doesn't undergo hydrolysis because of the absence of vacant d-orbitals. But in SiCl4 silicon has vacant d-orbitals which can be used for hydrolysis. Hence SiCl4 can undergo hydrolysis.
iv.(i) This is because lead is more stable in +2 oxidation state than in +4 oxidation state due to inert pair effect. Therefore lead (II) chloride is more stable than lead (IV) chloride and hence lead (II) chloride does not react with chlorine to form lead (IV) chloride.
v.Carbon monoxide is poisonous for humans because it can easily form a complex with human hemoglobin. The complex formed between CO and Hb (CO-Hb) is very stable in nature, even more than the oxyhemoglobin complex (O2-Hb) by almost 300 times. Thus, in this state, hemoglobin does not further bind to oxygen.
Explanation:
Answer:
3-i.due to poor shielding effect of 3d shell in Gallium. Explanation: ... Theatomic radius of Ga is slightly lesser than of Al because in going from Al to Ga, the electrons have already occupied 3d sub shell in Ga.
ii.BF3 acts as a Lewis acid when it accepts the lone pair of electrons that NH3 donates
iii.CCl4 doesn't undergo hydrolysis because of the absence of vacant d-orbitals. But in SiCl4 silicon has vacant d-orbitals which can be used for hydrolysis. Hence SiCl4 can undergo hydrolysis.
iv.(i) This is because lead is more stable in +2 oxidation state than in +4 oxidation state due to inert pair effect. Therefore lead (II) chloride is more stable than lead (IV) chloride and hence lead (II) chloride does not react with chlorine to form lead (IV) chloride.
v.Carbon monoxide is poisonous for humans because it can easily form a complex with human hemoglobin. The complex formed between CO and Hb (CO-Hb) is very stable in nature, even more than the oxyhemoglobin complex (O2-Hb) by almost 300 times. Thus, in this state, hemoglobin does not further bind to oxygen.