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Introduction to the tetravalency of carbon
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1876
The number of atoms in 1.2g of carbon - 12 isotope is
A.
1.00 x 10
22
B.
6.02 x 10
22
C.
1.20 x 10
23
D.
1.00 x 10
23
E.
6.02 x 10
24
View Answer & Discuss (2)
WAEC 1994
1877
Tetraoxosulphate (lV) acid is described as strong acid because it is highly
A.
corrosive
B.
concentrated
C.
reactive
D.
soluble in water
E.
ionized in water
View Answer & Discuss (1)
WAEC 1994
1878
The following will decolourize acidified potassium tetraoxomanganate (VII) solution except
A.
sulphur (lV) oxide
B.
but-3-ene
C.
pentane
D.
hydrogen sulphide
E.
propyne
View Answer & Discuss (2)
WAEC 1994
1879
Polyatomicity is illustrated by molecules of
A.
sulphur
B.
carbon (IV) oxide
C.
noble gases
D.
liquefied oxygen
E.
liquefied nitrogen
View Answer & Discuss (4)
WAEC 1994
1880
Calcium is usually extracted by the electrolysis of its
A.
trioxonitrate (V)
B.
tetraoxosulphate (IV)
C.
oxide
D.
hydride
E.
chloride
View Answer & Discuss
WAEC 1994
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