THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

CHEMISRY FTNA 2016

1. The scientific study of matter, compounds and chemical reactions
2. The scientific study of compounds, mixtures and organic substances
3. The scientific study of composition, structure and properties of matter
4. The study of relation between human being, medicine and pollution.

(ii) A non-luminous flame is the most applicable flame for heating purposes because:

1. It is very noisy
2. It has no soot
3. It is very hot
4. It has no colour

(iii) Matter is defined as anything that has:

1. Volume and occupies space
2. Mass and occupies space
3. Mass and occupies density 
4. Density and space

(iv) Which of the following process is used in preventing rust of an iron?

1. Water
2. Boiling
3. Salting
4. Galvanization

(v) Water is a universal solvent because:

1. It is available everywhere
2. It boils at 100⁰C
3. It dissolves most of the solutes
4. It dissolves all crystals in compounds

(vi)  Carbon has two main isotopes, ¹² C and ¹⁴ C with relative abundance of 98.89% and 1.11% respectively. Calculate the relative atomic mass of carbon.

1. 13.5
2. 12.01
3. 6
4. 27

(vii) Class F fire can best be extinguished by using

1. Carbon dioxide
2. Wet chemical
3. Water
4.  Sand

(viii)Which of the following components can be separated by filtration method?

1. Sand and water 
2. Kerosene and water
3. Ethanol and water 
4. NaCl and water

(ix) Which of the following is the colour change when cobalt chloride paper is used to test the presence of water?

1. White when dry and pink when wet
2. Blue when dry and pink when wet
3. Yellow when dry and pink when wet
4. Pink when dry and blue when wet

(x) All domestic utensils made of iron undergo rusting when exposed to

1. Air and fire
2. Air and oil
3. Air and water
4. Water and oil