OAU Chemistry 2008/2009 Past Questions

Consider the reaction 2A_(g) ⥨ B_(g) + C_(g) ΔH = +25.6KJ. Which of the following changes will favour the formation of the products of the reaction represented above, at equilibrium?

An element ²²⁶₈₈X undergoes radioactive decay by emitting two alpha particles and a beta radiation. Which of the following nuclei correctly describe the product formed by the reaction?

Which of the following alkanols will not undergo oxidation reaction by acidified K₂Cr₂O₇?

The electronic configuration of the specie underlined as in the molecule H₂S is.

The functional group(s) of an amino acid is/are

A student while trying to identify two gases labeled A and B, found that gas A is acidic to litmus paper and turn acidified potassium dichromate solution green, while gas B turns red litmus paper blue and forms dense white fume with hydrogen chloride. The correct identity of A and B respectively are

Which of the following titrations will have a solution with a pH greater than 7 at the end point (equivalent point) of the titration?

70cm³ of hydrogen are sparked with 25cm³ of oxygen at S.T.P. The total volume of the residual gas is

A solution X, on mixing with AgNO³ solution, gives a white precipitate soluble in NH³. A solution Y when added to X, also gives a white precipitate which is soluble on boiling. Solution Y contains

Which of the following is an exception in the assumptions of the kinetic theory of gases?

A saturated solution AgCI was found to have a concentration of 1.30 x 10^-5 moldm^-3. The solubility product of AgCl therefore is

0.06g of a hydrocarbon occupies 32cm³ at S.T.P. Its formula is

Consider the following compounds: (i) CH₃CH2C(CH3)2CH2CH3 (ii) CH3CH2CH2CH3 (iii) CH3CH(CH3)C(CH3)2CH3 (iv) CH3CH(CH3)CH3.

Which of the following is NOT a redox reaction?

Which of the following processes leads to increase in entropy?

Which one of the following statements is true?

A liquid begins to boil when

An element which exists in more than one crystalline form is said to exhibit.

Which of the following is an example of a chemical changes?

The electronic configuration in the ground state of the chloride ion (Cl)

The oxidation number of oxygen in BaO² is

Which ONE of the following statements is true for the p-block elements?

The general formula for carboxylic acids

The functional group represented in the compound CH³CH²CH²CH²CH=O is