1994 JAMB UTME Chemistry Past Questions

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1994

A mixture of sand, ammonium chloride and sodium chloride is best separated by?

1994

For a gas, the relative molecular mass is equal to 2Y. What is Y?

1994

To what temperature must a gas 273 K be heated in order to double both its volume and pressure?

1994

8g CH4 occupies 11.2 dm3 at s.t.p. What volume would 22 g of CH3CH3 occupy under the same condition?(C = 12, H = 1)

1994

At the same temperature and pressure, 50 cm3 of nitrogen gas contains the same number of molecules as?

1994

A pure solid usually melts?

1994

Which of the following physical properties decreases down a group in the periodic table?

1994

The number of electrons in the valence shell of an element of atomic number 14 is?

1994

An increase in temperature causes an increase in the pressure of a gas because?

1994

The shape of ammonia molecule is?

1994

The densities of two gases, X and Y, are 0.5 g dm-3 and 2.0 dm-3 respectively.What is the rate of diffusion of X relative to Y?

1994

The solubility, in moles per dm3 of 20.2 g of potassium trioxonitrate (V) dissolve in 100 g of the resulting mixture is?(K = 39, O = 16, N =14).

1994

Sodium chloride has no solubility product value because of its?

1994

A major effect of oil pollution in coastal waters is the?

1994

A solid that absorbs water from the atmosphere and forms an aqueous solution is?

1994

Element X, Y and Z belong to groups I, V and VII respectively. Which of the following is TRUE about the bond types of XZ and YZ3?

1994

What volume of oxygen measured at s.t.p would be liberated on electrolysis by 9650 coulombs of electricity?(Molar volume of gas = 22.4 dm3, F = 96,500 C mol-)

1994

20 cm3 of a 2.0 M solution of ethanoic acid was added to excess of 0.05 M sodium hydroxide. The mass of the salt produced is?(Na = 23, C = 12, O = 16, H = 1)

1994

Which of the following compounds is a base?

1994

A few drops of concentrated PCI are added to about 10cm3 of a solution of pH 3.4. The pH of the resulting mixtures is?

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