Answer Guide Online MCQ S3_4E

 

1.
a) molecules composed of only two atoms (covalently bonded)
b) hydrogen/ nitrogen/ oxygen/ fluorine/ chlorine/ bromine/ iodine
 2.
 
3.  O2-,  Na+
4.
a) highest concentration of reactants/ as reaction proceeds reactants are used up
b)
Lower temp:  curve to right, should flatten off.  no higher than original.
 Powder: curve to left, should level no higher  original.
13. a) N2 b) Al c) H2
d)  Cl2 e)  Br2  f)  H2O
g) CCl4 h) NF3 i) SiBr4
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