Of the molecules below. the bond in ________ is the most polar.

Multiple choice
11. Of the molecules below, the bond in is the most polar. C) HC DO HF E) H2 A) HBr B) H 12. The C o bond in COC12 can be described as A) a a bond and a m bond, both involving sp hybrid orbitals on C B) a a bond involving an sp hybrid orbital on C and a m bond involving a p orbital on C) a o bond and a m bond, both involving sp2 hybrid orbitals on C D) a o bond involving an sp2 hybrid orbital on C and a m bond involving a p orbital on C 13. The electron configuration belonging to the atom with the highest ionization energy is A) is 2s 2p 3s B) is 2s 2p 3s ls 2s 2p 3s 3p D) ls 2s 2p 3s 3p 3s 3p 14. Which isoelectronic series is correctly arranged in order of increasing radius? C) Ca 15. Which of the following correctly represents the electron affinity of bromine? A) Brtg)- Br (g) e B) Br(g)+ e Br (g) Brz (g)+2e 2Br (g)

Answer

11) Polarity of a bond is directly proportional to the electronegativity difference between the constituent atoms. Here electronegativity difference is higher for HF Answer D) HF 12) Carbon on COCl2 is sp2 hybridized. The double bond involves one sigma bond and one pi bond Answer C) A bond and a bond, both involving sp2 hybrid orbitals on C 13) Here, among the provided, the highest ionization energy is shown by Chlorine Answer E) 1s2 2s2 2p6 3s2 3p5 14) Here, Cl will have highest radius and Ca2+ will have lowest radius Answer D) Ca2+ < K+ < Ar < Cl 15) Electron affinity can be defined as the energy released when an isolated gaseous atom accepts an electron.

Answer B) Br (g) + e     rightarrow    Br (g)

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