1982 JAMB UTME Chemistry Past Questions

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1982

The nitrogen gas obtained by burning an excess of phosphorus in air has a density higher than the nitrogen from nitrogen compounds because the nitrogen from air is contaminated with?

1982

If atom X with six electrons in its outermost shell combines with atom Y with one electron in its outermost shell to form an ionic compound, then?

1982

When a little brine was added to a metal nitrate a white precipitate was formed which first turned violet and then black on exposure to ai. The metal nitrate is therefore?

1982

If the temperature of a gas is increased?

1982

100 cm3 of oxygen is made to react with 50 cm 3 of hydrogen, and the whole reaction mixture was then passed through anhydrous calcium chloride. What is the volume of gas left?

1982

9.8g of solid potassium chlorate (KClO3) were added to 40 cm3 of water and heated to dissolve all the solid. As the solution cooled, crystals of potassium chlorate started forming at 60°C. The solubility of potassium chl…

1982

The pressure on 100 cm3 of oxygen gas at 35°C is 750mm of Hg.What would be the volume of the gas if the pressure is increased to 1000mm of Hg without changing the temperature?

1982

0.07g of a hydride of carbon occupies 56.0cm3 at S.T.P. when vaporized and contains 14.29% by mass of hydrocarbon is(C = 12, H = 1)

1982

A mixture contains 20cm3 of hydrogen, 35cm3 of oxygen, 15cm3 of carbon monoxide and 10cm3 of nitrogen at S.T.P. Which of the following gives the mole fraction of hydrogen in this mixture?

1982

A current of 10.0A was passed for 1 hour through a solution of copper (ll) sulphate between the copper electrodes. Which of the following observation would be correct?(1 Faraday = 96,500 coulobms) (i) 0.186 mole of coppe…

1982

Which of the following is a neutralization reaction? Addition of

1982

An element X has two isotopes, 2010X and 2210X, present in the ratio 1:3. The relative atomic mass of X would be?

1982

When a pressure cooker is half filled with water, and heated to boiling point, then the pressure inside the cooker will?

1982

Which of the following bonds exist in crystalline ammonium chloride (NH4Cl)?

1982

What weight of sodium hydroxide is required to make 500 cm3 of 0.2 M solution?(Na = 23, O = 16, H = 1)

1982

How many grams of methylacetylene (propyne) CH3 - C Ξ CH will completely discharge the colour of 8g of bromine?(Br = 80, C = 12, H = 1)

1982

Magnesium ribbon was added to each of the following aqueous solution in turn: H2SO4, AgNO3, HNO3, HCl, NH3, HCl, NH3. In which case does the magnesium become covered with a dark precipitate?

1982

When copper powder is heated with concentrated sulphuric acid, the gas produced is?

1982

1982 JAMB UTME Chemistry Past Questions

The nitrogen gas obtained by burning an excess of phosphorus in air has a density higher than the nitrogen from nitrogen compounds because the nitrogen from air is contaminated with?

If atom X with six electrons in its outermost shell combines with atom Y with one electron in its outermost shell to form an ionic compound, then?

When a little brine was added to a metal nitrate a white precipitate was formed which first turned violet and then black on exposure to ai. The metal nitrate is therefore?

If the temperature of a gas is increased?

100 cm3 of oxygen is made to react with 50 cm 3 of hydrogen, and the whole reaction mixture was then passed through anhydrous calcium chloride. What is the volume of gas left?

9.8g of solid potassium chlorate (KClO3) were added to 40 cm3 of water and heated to dissolve all the solid. As the solution cooled, crystals of potassium chlorate started forming at 60°C. The solubility of potassium chl…

The pressure on 100 cm3 of oxygen gas at 35°C is 750mm of Hg.What would be the volume of the gas if the pressure is increased to 1000mm of Hg without changing the temperature?

0.07g of a hydride of carbon occupies 56.0cm3 at S.T.P. when vaporized and contains 14.29% by mass of hydrocarbon is(C = 12, H = 1)

A mixture contains 20cm3 of hydrogen, 35cm3 of oxygen, 15cm3 of carbon monoxide and 10cm3 of nitrogen at S.T.P. Which of the following gives the mole fraction of hydrogen in this mixture?

A current of 10.0A was passed for 1 hour through a solution of copper (ll) sulphate between the copper electrodes. Which of the following observation would be correct?(1 Faraday = 96,500 coulobms) (i) 0.186 mole of coppe…

Which of the following is a neutralization reaction? Addition of

An element X has two isotopes, 2010X and 2210X, present in the ratio 1:3. The relative atomic mass of X would be?

When a pressure cooker is half filled with water, and heated to boiling point, then the pressure inside the cooker will?

Which of the following bonds exist in crystalline ammonium chloride (NH4Cl)?

What weight of sodium hydroxide is required to make 500 cm3 of 0.2 M solution?(Na = 23, O = 16, H = 1)

How many grams of methylacetylene (propyne) CH3 - C Ξ CH will completely discharge the colour of 8g of bromine?(Br = 80, C = 12, H = 1)

Magnesium ribbon was added to each of the following aqueous solution in turn: H2SO4, AgNO3, HNO3, HCl, NH3, HCl, NH3. In which case does the magnesium become covered with a dark precipitate?

When copper powder is heated with concentrated sulphuric acid, the gas produced is?

In the preparation of carbon monoxide by heating ethanedioic acid with concentrated sulphuric acid, the concentrated sulphuric acid act as?

Brass is an alloy containing copper and?