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[ Post UTME Begins ]:
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2846
The reaction C
2
H
6
→ C
2
H + H
2
is known as
A.
dehydration
B.
dehydrogenation
C.
displacement
D.
hydrogenation
E.
reduction
View Answer & Discuss (3)
NECO 2003
2847
Which is NOT a synthetic polymer?
A.
nylon
B.
Orion
C.
Perspex
D.
polystyrene
E.
wool
View Answer & Discuss (1)
NECO 2003
2848
A calcium atom and a calcium ion have the same
A.
chemical properties
B.
electric charge
C.
electronic structure
D.
number of electrons
E.
number of neutrons
View Answer & Discuss
NECO 2003
2849
Which compound will give propane when it Is dehy drated by an excess of hot, concentrated tetraoxosvlphate(VI) acid?
A.
CH
3
CH
2
CHO
B.
CH
3
CH
2
CH2OH
C.
CH
3
CH
2
COQH
D.
CH
3
CH
2
0CH
E.
CH
3
CH
3
OH
View Answer & Discuss (7)
NECO 2003
2850
Which formula is used to indicate the degree of acidity of an acid?
A.
\( [H^+] = ^{\text{mass of acid relative}} molecular mass of acid \)
B.
F = number of H+ = ions x molar mass of the acid
C.
Kw = [H+][OH-]
D.
pH = - log
10
[H+]
E.
pKa = -log
10
Ka
View Answer & Discuss
NECO 2003
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