2016 Ondo State Joint Exam Chemistry Obj & Essay Questions And Answers Now Available For Free

CHEMISTRY ANSWERS



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CHEM-OBJ
1-10: BCBBCCCBBB
11-20: BAADBADDAB
21-30: BABABAAADB
31-40: CCBBADBDDC
(1A)
DALTON Law Of pressure
It states that at a particular temperature,
the total pressure of
a mixture of two or more non-interacting
(ideal) gases is
equal to the sum of partial pressures of
the individual gases.
Mathematically, it can be written as: Ptotal
= P1 + P2 + P3 + ...
where P1, P2, P3, etc. are the partial
pressures of each
component of the mixture.
(1B)
LOADING
(1C)
I. Aluminum Oxide.
It forms a thin oxide coating (Al2O3)
almost instantly on exposure to air and
that coating prevents
further reaction with the metal, thus
making the world safe
for soda and beer cans (not to mention
beer kegs!).
ii. Sodium Metal
Sodium is an alkali metal, and chlorine is a
halogen. This
means that sodium contains one electron
in its outer orbital
and chlorine contains seven electrons in its
outer orbital.
iii. sodium hydroxide
The species, [Al(OH)4]- is the
tetrahydroxoaluminate complex
ion. It only appears at high pH.
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2A
ALKALI COMPOUNDS
Common name | Chemical name | Formula
Barite Barium | sulfate | BaSO4
Epsom salts |magnesium sulfate | MgSO4
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