P Block Elements
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7.14 Write the order of thermal stability of the hydrides of Group 16 elements.
7.14 Write the order of thermal stability of the hydrides of Group 16 elements.
7.14
The enthalpy of dissociation of H-E bond (E= O, S, Se, Te, Po) in the hydrides decreases down the group. Hence, the thermal stability of the hydrides decreases down the group. The thermal stability is in the order H2O > H2S> H2Se> H2Te >H2Po.
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7.13
Sulphur generally exists in the combined form in the following sulphate minerals like gypsum (CaSO4.2H2O), Epsom salt (MgSO4.7H2O), barite (BaSO4) and sulphide minerals such as galena (PbS), zinc blende (ZnS), copper pyrites (CuFeS2).
Traces of sulphur are present in volcanoes as hydrogen sulph
Upvote 7.12
H3PO3 on heating dissociates into orthophosphoricacid (H3PO4) and phosphine (PH3). Since, the oxidation states of orthophosphorous acid (H3PO3), orthophosphoric acid (H3PO4) and phosphine (PH3) are +3, +5 and -3 respectively, this reaction is known as a disproportionate reaction (since the oxida
Upvote 7.11
The basicity of a compound is defined as the number of acidic hydrogen atoms present in the compound. For a hydrogen atom to be acidic, it should be bonded to a strongly electronegative element like fluorine or oxygen atom.
As shown in the figure, 3 hydrogen atoms (green circled) are attached t
Upvote 7.10 Write a balanced equation for the hydrolytic reaction of PCl5 in heavy water.
7.10 Write a balanced equation for the hydrolytic reaction of PCl5 in heavy water.
7.10
The balanced equation for the hydrolytic reaction of PCl5 in heavy water (D2O):
Therefore, on adding the above two equation we can say that the net reaction is:
Upvote 7.9
Generally, in CCl4, all the C-Cl bonds are equal. But that is not in the case of PCl5. All the bonds in PCl5 are not similar. It has three equatorial and two axial bonds. Therefore, when PCl5 is heated strongly, the axial bonds breakdown and thus PCl5 decomposes to PCl3.
Upvote <p><strong>7.9 What happens when PCl5 is heated?</strong></p>
7.8 What happens when white phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO2 ?
7.8 What happens when white phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO2 ?
7.8
White phosphorous when heated with concentrated NaOH solution (in a CO2 atmosphere) gives phosphine, PH3. Another product is Sodium hypophosphite, NaH2PO2.
Upvote 7.7 Bond angle in PH4 + is higher than that in PH3. Why?
7.7 Bond angle in PH4 + is higher than that in PH3. Why?
7.7 Hybridisation of P in PH3 is sp3. Out of the four sp3 hybrid orbitals, three are involved in bonding with the three H-atoms and the fourth one has a lone pair in it.
PH3 when combines with a proton, it forms PH + in which the lone pair is absent. So, here all the four hybrid orbitals are involved
Upvote 7.6 Diagram of N2O5:
Covalence of nitrogen in N2O5 is 4 (as can be said from the above diagram).
Note: Covalence is the number of electron pairs that an atom can share with other atoms.
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