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686
Which of the following compounds has hydrogen bonds between its molecules?
A.
HF
B.
HBr
C.
HCI
D.
HI.
View Answer & Discuss
WAEC 2007
687
Which of the following species does not contain a co-ordinate bond?
A.
AI
2
CI
6
B.
CCI
4
C.
H
3
O
+
D.
NH
+
4
View Answer & Discuss (15)
WAEC 2007
688
14.8 g of a salt (z)dissolved in 250 cm
3
of distilled water gives a concentration of 0.80 mol dm
-3
. Calculate the molar mass of the salt (z).
A.
13.5 g mol
-1
B.
18.5 g mol
-1
C.
47.4 g mol
-1
D.
74.0 g mol
-1
View Answer & Discuss (2)
WAEC 2007
689
How many atoms are there in one mole of hydrogen gas? [Avogadro's constant = 6.02 x 1023mol-1]
A.
1.2 x 10
23
B.
6.0 x 10
23
C.
1.2 x10
24
D.
6.0 x 10
24
View Answer & Discuss (3)
WAEC 2007
690
What is the IUPAC name of the compound represented by the molecular formula NaCIO
4
?
A.
Sodium tetraoxochlorate (l)
B.
Sodium tetraoxochlorate (IV)
C.
Sodium tetraoxochlorate (VI)
D.
Sodium tetraoxochlorate(VII)
View Answer & Discuss (2)
WAEC 2007
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