Question

HH Imported From S. 13. Which of the pain of moules below can only have dipol-dipole Interactions (as well as London Dispersion Forces)? a) O-CO and OCHO and b) "H . d) and Na and H "H A. a) only B. b) only C. c) only D. d) only E. b) and c) F. c) and d) 14 Which molecules are non-polar? A. SF4 B. CF4 C. H2O D. CH2Cl2 E. Os 16. Which of the following transitions in a hydrogen atom would emit the highest energy photon? An=2 ton=1 B. n6 ton 3 C.n2 ton Din 1 ton2 En 3 ton2

Answer 1

0=6=0 08 (A) 0=6=0 and 09 CO, is lirea thus the bond moments cancel exactly. So, CO, has a zero total permanent 10 dipole moment. 11 So, co, will not show dipole dipole interactions . 12 (B) ACHO and HCHO 13 Aldehydes are polar, it will show dipersion forces and permanent dipolo on nearby molecules. (c) HCHO and Nat 14 15 16 Aldehydes are polar and the interaction between O and Nat is called Ion Dipole attraction (D) HCHO and HCOO 17 18 No clipole interaction Notes Thus, option (B) b only is correct,

VIJAYA BANK अगस्त AUGUST 35 28 29 30 31 25 26 27 42/123 Week 35 B (clue to presence of lone pair Molecule Polarity SF4 OD S and assymetric structure) CF4 Non-Polar (due to Symmetric structure) HO Polar (Bent shape, unequal charge distribution) CH₃C Polar ( Due to wrequal change distribution ) Oz Polar (Best ( Bent Shape). Thus, only CF4 is non- polar Option (B). 8 otes

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