THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL
CHEMISTRY FTNA 2014
(i) An isotope of carbon has an atomic number 6 and a mass number of 14, this means that it has:
(ii) Which of the following gives the correct meaning of air?
(iii) Why is water a universal solvent?
(iv) How many numbers of shells are there in Magnesium atom?
(v) Technicians prefer to use blue flame in welding because:
(vi) Which of the following is the characteristic of solid?
(vii) What is the oxidation state of Chlorine in KCIO3?
(viii) Which of the following is a sequential method of separating mixture of salt and sand?
(ix) Which of the following is the best apparatus for measuring accurately the volume of a given solution?
(x) The factors that affect the problem being investigated are referred to as:
2. Match each item in List A with a correct response in List B by writing its letter bellow the number of the corresponding item in the table provided.
(i) Method of recovery of both solute and solvent from a liquid.
(ii) Method of separating two miscible liquids which their boiling points are close together.
(iii) Method of separating two immiscible liquids.
(iv) Method of separating two solids by heating in a way that one changes its state directly to gas.
(v) Method of separating coloured components using a moving solvent on materials that absorb such solvent.
(vi) A suitable method of separating edible oils from seeds.
(vii) Method of separating solid mixture which contains iron.
(viii)Method of separating an insoluble solid from a liquid.
(ix)Method of separating a soluble solid and a solvent.
(x)Method of separating liquids which forms a suspension with a solvent
A. Layer separation
C. Simple distillation
E. Hand picking
F. Fractional distillation
H. Solvent extraction