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676
The ammonium compound used in the manufacture of dry cells is
A.
NH
4
NO
3
B.
(NH
4
)SO
4
C.
NH
4
Cl
D.
(NH
4
)
2
CO
3
View Answer & Discuss (4)
WAEC 2006
677
Which of the following equations represents a substitution reaction?
A.
C
2
H
10(g)
+ CI
2(g)
→ C
4
H
9
CI
(g)
+ HCI
(g)
B.
C
2
H
4(g)
+ HCI
(g)
→ C
2
H
5
CI
(l)
C.
C
2
H
2(g)
+ 2H
2(g)
→ C
2
H
6(g)
D.
C
3
H
4(g)
+ 40
2(g)
→ 3CO
2(g)
+ 2H
2
O
(g)
View Answer & Discuss
WAEC 2006
678
When sodium atom form the ion Na+,
A.
it gains one proton
B.
it achieves a noble gas configuration
C.
its atomic number increases
D.
it gains one electron
View Answer & Discuss (7)
WAEC 2007
679
Which of the following statements about rare gases are correct?
A.
Their outermost shells are fully filled
B.
They are generally unreactive
C.
Their outermost shells are partially filled
D.
They have lone pair of
View Answer & Discuss (4)
WAEC 2007
680
Which of the following properties is characteristic of the halogens?
A.
Ability to accept electrons readily
B.
Ability to donate electrons readily
C.
Ability to from basic oxides
D.
Formation of coloured compounds
View Answer & Discuss
WAEC 2007
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