(i)                 Which of the following is not among the instruments and chemicals used for First Aid? 

1. A Pair of scissors
2. Assorted bandages
3. Sterilized cotton wool
4.  Mosquito spray
5. Iodine tincture

(ii)               If 0.9 g of calcium metal is burnt in air, the mass of powder formed is

1. 1.14 g
2.  1.18 g
3. 1.12 g
4.  1.08 g
5. 1.26 g

(iii)             Domestic utensils made of iron do rust as a result of the presence of

1.  air and fire
2.   air and water
3. water and oil
4.  oil and fire
5.  air and oil.

(iv)              Which of the following statements about the hardness of water is not true?

1. Soft water readily forms lather with soap
2. Hard water does not readily form lather with soap
3. Permanent hardness of water is due to sulphates of calcium and magnesium
4.  Permanent hard water becomes soft on boiling
5. Calcium and magnesium hydrogen carbonates decompose on boiling.

(v)                Elements lose or gain electrons to form

1. isotopes
2. radicals
3.  molecules
4. ions
5.  allotropes

(vi)              An aqueous solution with pH 6 is

1. slightly acidic
2. strongly alkaline
3.  strongly neutral
4.  strongly acidic
5. slightly alkaline.

(vii)            The atmospheric effect of burning fuel such as wood and petrol oils is to

1. reduce oxygen gas
2.  produce clouds
3. add carbon dioxide gas
4. increase water vapour
5.  produce energy.

(viii)          A mixture of 50 cm³  of ethanol and 50 cm³ of pure water can be separated by

1.  solvent extraction
2. fractional distillation
3. simple distillation
4.  filtration
5.  decantation.

(ix)              The oxidation state of chlorine in sodium chlorate (NaClO3) is

1.  ­1
2. +2
3.  +5
4.  +3
5. 3.

(x)                When ethane (C2H 6) burns in air with a bright smoky flame the product(s) formed will be

1.  carbon dioxide gas
2.  carbon dioxide gas and water
3. water
4. water and oxygen gas
5. oxygen gas.