OOU Post UTME Chemistry Past Questions

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Palm wine turns sour with time because

A gaseous mixture of 80.0g of oxygen and 56.0g of nitrogen has a total pressure of 1.8atm. The partial pressure of oxygen in the mixture is

Element P, Q, R and S have 6, 11, 15 and 17 electrons respectively, therefore

Which of the following is not a member of the homologous series of the paraffins?

Copper metal dissolves in concentrated trioxonitrate (v) acid with the resultant evolution of

Organic molecules that have the suffix -ene are unsaturated hydrocarbons that have

The molecular formula of a common organic laboratory anesthetic is

An element X forms the following compounds with chlorine: XCl4, XCl3, XCl2. This illustrates the

Lucas reagent is used to test for

Cotton is almost pure

The major source of oxides of nitrogen is from the burning of

Which quantum number divides shells into orbitals?

The weakest attractive force that can be observed between two molecules is

0.0075 mole of calcium trioxocarbonate (iv) is added to 0.015 mole of a solution of HCl. The volume of gas evolved at S.T.P is

When a solution of silver (I) nitrate is saturated with hydrogen sulphide, a black precipitate forms, which is

The percentage of water of crystallization in ZnSO4. 7H2O is

A mixture of sugar and sulphur can be separated by

Which of the following gases can be collected by method of downward delivery?

The principal constituents of natural gas is

0.499g of CuSO4·XH2O when heated to constant weight gave a residue of 0.346g. What is the value of X?

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