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Chemistry
UTME / JAMB 2010
Quantitative and Qualitative Analyses
Solution
Calculate the volume of 0.5 mol dm\(^{-3}\) H\(_2\)SO\(_4\) that is neutralized by 25 cm\(^3\) of 0.1 mol dm\(^3\) NaOH?
A
5.0 cm3
B
2.5 cm3
C
0.4 cm3
D
0.1 cm3
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2010
Quantitative and Qualitative Analyses
Solution
To a solution of an unknown compound, a little dilute tetraoxosulphate (VI) acid was added with some freshly prepared iron (II) tetraoxosulphate (VI) solution. The brown ring observed after the addition of a stream of concentrated tetraoxosulphate (VI) acid confirmed the presence of?
A
CO\(^{2-}_{3}\)
B
Cl-
C
SO\(_{3}^{2-}\)
D
NO\(^{2-}_{3}\)
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2010
Quantitative and Qualitative Analyses
Solution
A compound gives an orange-red color to non-luminous flame. This compound is likely to contain?
A
Na+
B
Ca2+
C
Fe3+
D
Fe2+
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2004
Quantitative and Qualitative Analyses
Solution
What volume of gas is evolved at S.t.p if 2g of calcium trioxocarbonate (IV) is added to a solution of hydrochloric acid?
[Ca = 40, C = 12, O = 16, Cl = 35.5, H = 1 Molar volume of a gas at s.t.p = 22.4 dm\(^3\)
A
112 cm3
B
224 cm3
C
448 cm3
D
2240 cm3
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1985
Quantitative and Qualitative Analyses
Solution
A colourless organic compound X was burnt in excess air to give two colourless and odourless gases, Y and Z, as products. X does not decolorize blue bromine vapour, Y turns lime milky while Z gives a blue colour with copper (ll) tetraoxosulphate (IV).
Compound X is?
A
an alkene
B
an alkane
C
an alkyne
D
tetrachloromethane
E
dichloromethane
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1980
Quantitative and Qualitative Analyses
Solution
When dilute hydrochloric acid is added to iron(ll)sulphide, the gas evolved will?
A
turn moist red litmus paper blue
B
turn lime water milky
C
blacken lead acetate paper
D
rekindle a glowing splint
E
burn a sqeakly pop
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1980
Quantitative and Qualitative Analyses
Solution
Which of the following tests would confirm-unequivocally that a solution X contain the sulphate ion if it gives with?
A
silver nitrates solution, a white precipates insoluble in dilute HNO3
B
barium chloride solution, a white precipitate insoluble in dilute H2SO4
C
barium chloride solution, a white precipitate soluble in dilute HCl
D
barium chloride solution a white precipitate soluble in dilute ammonia
E
barium chloride solution a white precipitate insoluble in dilute HCl
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1980
Quantitative and Qualitative Analyses
Solution
When copper (ii) sulphate solution is treated with excess ammonium hydroxide, a precipitate is first formed, and then this dissolves to give a deep blue solution.
This deep blue solution is a?
A
Cu(OH)2
B
CuSo4.5H2O
C
(NH4)2SO4
D
Cu(NH3)4(OH)2
E
CuSO4.(NH4)2SO4.2H2O
medium Difficulty
Study Explanation