BUK Chemistry 2010/2011 Past Questions

Alkalis are used mainly

Which of the following solids will leave a block residue after being heated strongly

The properties of electrovalent compounds include the following except

Which of the following pairs illustrates isotopy

Carbon is often deposited in the exhaust pipe of cars because of the

What does x stand for in the following expression? X = log₁₀(H⁺)

Sulphur burns in air to produce

Which of the following changes is ΔS negative

Chlorine is used in water treatment as

Which of the following pieces of apparatus can be used for drawng a current of air through a liquid

What amount of copper will be deposited if a current of 10A was passed through a solution of copper(ii) for salt 965 seconds (if = 96500C)

Some precious stones such as ruby and sapphire consist of aluminium oxide colored by traces of

Consider the reaction represented by the following
CaCl_2(aq) + H₂C₂O_4(s) ⇋ CaC₂O_4(s) + 2HCl_aq
Which of the following would dissolve the precipitate of CaC₂O₄ formed?

The following gases decolorizes bromine water except

What volume of distilled water should be added to 400cm³ of 2.0 mole dm^-3 H₂SO₄ to obtain 0.02 mole dm^-3 of solution?

Which of the following indicates the correct oxidizing power of the halogens

Which of the following substance is a peroxide?

What volume of propane is left unreacted when 20cm³ of oxygen and 20cm³ of propane react according to the following equation? C₃H_8(g) + SO₂ ⟶ 3CO_2(g) + 4H₂O

The component of air that is removed when air is bubbled into alkaline pyrogallol solution is

Which of the following will not affect the degree of hardness in a sample of temporarily hard water.