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1006
In the preparation of ammonia, which of the following is used as the drying agent?
A.
CaO
B.
CaCI
2
C.
Conc. H
2
SO
4
D.
P
2
O
5
E.
H
3
PO
4
View Answer & Discuss (10)
JAMB 1981
1007
Which of the following can have an isomer?
A.
C
2
H
4
B.
C
4
H
10
C.
C
3
H
8
D.
C
2
H
6
E.
C
6
H
6
View Answer & Discuss (11)
JAMB 1981
1008
Allotropes are elements having?
A.
different physical but the same chemical properties
B.
different chemical but the same physical properties
C.
the same chemical and physical properties
D.
different atomic structure
E.
the same position in the periodic table
View Answer & Discuss (29)
JAMB 1981
1009
A polymerization reaction is one in which?
A.
small molecules form giant molecules
B.
atoms form molecules
C.
giant molecules form small molecules
D.
molecules form volatile compounds
E.
a molecule rearranges itself
View Answer & Discuss (2)
JAMB 1981
1010
Which of the following is the electronic configuration of sodium?
(Atomic number of Na = 11)
A.
1s
2
2s
2
2p
6
3s
2
B.
1s
2
2s
2
2p
6
3s
2
3p1s
2
2s
2
2p
6
3s
1
C.
1s
2
2s
2
2p
6
3s
1
D.
1s
2
2s
2
2p
6
3s
°
E.
1s
2
2s
2
2p
6
4s
1
View Answer & Discuss (1)
JAMB 1981
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