* There are trhee parts * I need explanation for each one Consider the reaction
ID: 1064005 • Letter: #
Question
* There are trhee parts
* I need explanation for each one
Consider the reaction illustrated using electron dot symbols: Elements X and Z could be (respectively): (A) Ca and O (B) Ca and Br (C) Na and Br (D) Na and O (E) Na and P Which compound(s) is/are expected to have a net zero dipole moment? (A) I only (B) II only (C) both I and II (D) neither I nor II Which statement best describes CO_2? (Drawing its Lewis structure might help you.) (A) It requires resonance-structures to describe. (B) It contains polar bonds and is a nonpolar molecule. (C) It is a polar molecule with lone pairs on the central atom. (D) The hybridization of the central atom is sp^3.Explanation / Answer
1)
X forms X+2 . X must be of group 2 . It will be Ca
Z forms Z-1 . Z must be of grop 17. It will be Br
Answer: B
2)
I is tetrahedral where all 4 bonds are formed by the same F
due to symmetry it will have zero dipole moment
II is trans alkene where F are located at diagonally opposite corners
This makes net dipole moment= 0
Answer: C
3)
CO2 is liner and hence it is non polar due to symmetry but each C=O bond is polar in nature
Answer: B
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