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[ Post UTME Begins ]:
View The List Of Schools That Have Released 2026 Post-UTME Forms.
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2311
In which of the following processes is biotechnology not applied?
A.
Manufacture of drugs
B.
Treatment of domestic sewage
C.
Production of alcoholic beverages
D.
Electroplating of metals
View Answer & Discuss (1)
WAEC 2005
2312
How many orbitals are in the d-sub shell?
A.
1
B.
3
C.
5
D.
7
View Answer & Discuss (3)
WAEC 2006
2313
An element X has isotopic masses of 6 and 7. if the relative abundance is 1 to 12.5 respectively, what is the relative atomic mass of X?
A.
6.0
B.
6.1
C.
6.9
D.
7.0
View Answer & Discuss (1)
WAEC 2006
2314
An atom
238
92
X decays by alpha particle emission to give an atom Y. The atomic number and mass number of Y are
A.
90 and 234 respectively
B.
91 and 238 respectively
C.
92 and 236 respectively
D.
93 and 238 respectively
View Answer & Discuss
WAEC 2006
2315
If 1 mole of sodium contains 6 x 10
23
atoms, how many atoms are contained in 0.6 g of sodium? [Na = 23]
A.
1.56 x 10
23
B.
1.56 x 10
22
C.
3.6 x 10
23
D.
3.6 x 10
22
View Answer & Discuss (1)
WAEC 2006
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