FORM TWO CHEMISTRY NECTA MULTIPLE CHOICE 2014

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:

  1. 6 protons, 8 neutrons, 6 electrons
  2. 8 protons, 6 neutrons, 8 neutrons
  3. 6 protons, 14 neutrons, 6 electrons
  4. 14 protons, 6 neutrons, 14 electrons.
Choose Answer :

(ii) Which of the following gives the correct meaning of air?

  1. Mixture of Nitrogen, Oxygen and dust particles.
  2. Mixture of Nitrogen, Oxygen and Carbon dioxide.
  3. C. Mixture of Nitrogen, Oxygen and Water vapour
  4. Homogenous mixture of gases.
Choose Answer :

(iii) Why is water a universal solvent?

  1. It is neither acidic nor basic than any other known liquid.
  2. It dissolves more substances than any other known liquid.
  3. It occurs naturally in all the three states of matter than any other liquid.
  4. It dissolves both organic and inorganic solutes than any other liquid.
Choose Answer :

(iv) How many numbers of shells are there in Magnesium atom?

  1. 1
  2. 2
  3. 3
  4. 4
Choose Answer :

(v) Technicians prefer to use blue flame in welding because:

  1. It is bright and non-sooty
  2. It is light and non-sooty
  3. It is very hot and large
  4. It is very hot and non-sooty
Choose Answer :

(vi) Which of the following is the characteristic of solid?

  1. It is packed together but does not have definite size.
  2. It is compact packed and has definite shape and size.
  3. It is loosely packed with irregular order.
  4. It is closely packed with uniform shape.
Choose Answer :

(vii) What is the oxidation state of Chlorine in KCIO3?

  1. +2
  2. -5
  3. +5
  4. +3
Choose Answer :

(viii) Which of the following is a sequential method of separating mixture of salt and sand?

  1. Evaporation, filtration and decantation
  2. Decantation, evaporation and filtration
  3. Sedimentation, evaporation and filtration
  4. Decantation, filtration and evaporation
Choose Answer :

(ix) Which of the following is the best apparatus for measuring accurately the volume of a given solution?

  1. Measuring cylinder
  2. Burette
  3. Beaker
  4. Conical flask
Choose Answer :

(x) The factors that affect the problem being investigated are referred to as:

  1. Dependent factors
  2. Variables
  3. Independent factors
  4. Conditions
Choose Answer :

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