Consider the hypothetical covalent molecule BA2 where the central atom B is conn

Question

Consider the hypothetical covalent molecule BA2 where the central atom B is connected to each of two A atoms. For each of the following situations indicate whether the molecule is polar or nonpolar;

a) A and B have the same electronegativity and the A-B-A bond angle is 180 degrees

b) A and B have the same electronegativity and the A-B-A boned angle is 100 degrees

c) B is more electronegative than A and the bond angle A-B-A is 180 degrees

d) B is more electronegative than A and the bond angle A-B-A is 100 degrees

e) B is less electronegative than A and the bond angle A-B-A is 180 degrees

f) B is less electronegative than A and the bond A-B-A is 100 degrees

2. Place the compounds cylcopentane, pentane, and 2-methylbutane in order of

a) increasing secondary force

b) increasing boiling point

c) increasing densitiy

3. Does ethane react with any of the following? If reaction occurs, write the equation for the reaction

a) H2SO4

B) NaCl

c) NaOH

d) FeCl3

Explanation / Answer

a). non-polar

b) polar

c) polar

d) polar

e)non-polar

f) polar

2. a) 2-methyl butane < pentane < cyclopentane

b) 2-methyl butane < pentane < cyclopentane

c) density : 2-methyl butane < cyclopentane < pentane

3. Ethane will react with FeCl3 to form a coordination compound.

FeCl3 + C2H4 ------------> [Fe (C2H4) Cl3]

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