Question

Consider the boiling point trends for simple molecular compounds that contain only X-H bonds (note: there are 2 questions about this graph). +H20 - HF - NH3 - CH4 --HF - HCI - HBr - HI --NH3 - PH3 – AsH3 - SbH +CH - SiH - Gehe - SnH Boiling point (°C) . -175 3 41 Row of non-H atom What does the bp trend from CH - SIH.GOH - SnH, demonstrate about induced-dipole/induced-dipole forces? (if you can't see the graph: bp = -162* CH. -112 SIH-88 Gel -52°C SH.) Select one: a strength increases as polarizability increases b. strength increases as molecular polarity increases 0. strength increases as molecular mass decreases d strength is not related to molecular structure strength increases as central atom size decreases D o

Answer 1

Boiling point increases The boiling points op Group - 16 hydrides is given bya Cha - 162°C Sith – 112°c Down the group Gehu - 88°c Snh4 - 52°c Regarding induced dipote-induced dipole interaction we can say that - Down the group (from CHA → Su Hu) the no. of electrons gradually increasas so, the size of the molecule will also increases. The large sized molecules can be easily polarized co, the develope -mont of charges over the two poles will be gradually increased which holds the molecules Logether much strongly as compared those molecules which are less polaritable ( like smaller molecules CH4 ete). so from CH4 snity as the molecular size increases the polarizability of the molecule will also increases due to which the induced dipole - induced dipole force will inereased and hence boiling points will also gradually mereased... So, option (a) is correct COM Scanned with CamScanner