1985 JAMB UTME Chemistry Past Questions

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1985

If the ONLY pollutants found in the atmosphere over a city are oxides of nitrogen, suspended lead compounds. carbon monoxide and high levels of methane, the probable source(s) of the pollution must be?

1985

What is the formula of sodium gallate if gallium (Ga)shows an oxidation number of + 3?

1985

X + Y = Z is an equilibrium reaction. The addition of a catalyst?

1985

In the reaction H2(g)O \(\to\) H2(g) + 1/2O2(g)ΔH = -2436000 KJ, which of the following has no effect on the equilibrium position?

1985

Which of the following metals will displace iron from a solution of iron(ll)tetraoxosulphate(lV)?

1985

2MnO-4 + 10Cl- + 16H+ → 2Mn2+ + 5Cl2 + 8H2O. Which of the substances serves as an oxidizing agent?

1985

A certain industrial process is represented by the chemical equation 2A(g) + B(g) \(\to\) C(g) + 3D(g) \(\Delta\)H = X kJmol-1. Which of the following conditions will favour the yield of the products?

1985

A correct electrochemical series can be obtained from K, Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging?

1985

The energy change (ΔH) for the reaction CO(g) + (1)/(2)O2(g) → is?(ΔHi(CO) = -110.4 kJ mol-) (ΔHi(CO2) = -393 kJ mol-)

1985

When pollen grains are suspended in water and viewed through a microscope, they appear to be in a state of constant but erratic motion. This is due to?

1985

A man suspected of being drunk is made to pass his breath into acidified potassium dichromate solution. If his breath carries a significant level of ethanol, the final colour of the solution is?

1985

Which of the following is used in the manufacture of bleaching powder?

1985

Complete hydrogenation of ethyne yields?

1985

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 cop…

1985

Which of the following substances is the most abundant in the universe?

1985

Solid sodium hydroxide on exposure to air absorbs a gas and ultimately gives another alkaline substance with the molecular formula?

1985

An organic compound decolourized acidified KMnO4 solution but failed to react with ammoniacal silver nitrate solution. The organic compound is likely to be?

1985

Tetraoxosulphate (IV) ions are finally tested using?

1985

Addition of dilute hydrochloride acid to an aqueous solution of a crystalline salt yield a yellow precipitate and a gas which turned dichromate paper green. The crystalline salt was probably?

1985

When marble is heated to about 1473 K, another white solid is obtained which reacts vigorously with water to give an alkaline solution. The solution contains?

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