Which of the following is NOT a redox reaction?

A. 2HNO₂ + 2HI → 2H₂O + 2NO + I₂

B. Zn + H₂SO₄ → ZnSO₄ + H₂

C. Ca(HCO₃)₂ → CaCO₃ + H₂O + CO₂

D. 4FeO + O₂ → 2Fe₂O₃

E. 2Na + Cl₂ → 2NaCl

0.16g of methane when burnt raises the temperature of 100g of water by 40°C. What is the of combustion of methane when if the heat capacity of water is 4.2 Jg^-1°C^-1?

(CH₄ = 16)

A. 1,160 kJ mol^-1

B. 1,180 kJ mol^-1

C. 1,560 kJ mol^-1

D. 1,600kJ mol^-1

E. 1,680 kJ mol^-1

Which of the following processes NOT lead to a chemical change?

A. Strirring iron in sulphur (IV) acid

B. Stirring sodium carbonate in water

C. Stirring glucose in concentrated sulphur (IV) acid

D. Mixing sulphur (IV) acid with potassium carbonate

E. Titrating an acid against base

Brass is an alloy containing copper and?

A. zinc

B. tin

C. aluminium

D. silver

E. lead

The number of grammes of potassium hydroxide in 250cm³ of one molar solution is?
(K = 39, O = 16, H = 1)

A. 40g

B. 52g

C. 100g

D. 26g

E. 14g

60cm³ of hydrogen are sparked with 20cm³ of oxygen at 100°C and 1 atmosphere. The total volume of the residual gases is?

A. 60 cm³

B. 10 cm³

C. 40 cm³

D. 30 cm³

E. 70 cm³

The solubility curve of a solid X (molecular mass = 160) is as show above. 1,000 cm3 of a saturated solution of X at 80°C is cooled to 40°C . The weight of X crystalized out would be

A. 10 g

B. 12 g

C. 14 g

D. 16 g

E. 18 g

The i.u.p.A.C name for the compound

A. 2-chloro-isopentane

B. 3-chloro-isopentane

C. 2-chloro-2-methylbutane

D. 1-chloro-2,2- dimethylpropane

E. 2-chloro-2-ethylpropane

1.00g of mixture of calcium carbonate and calcium oxide liberated 0.33g of carbon dioxide on strong heating. The percentage of calcium oxide in the mixture is? (Ca = 40, C = 12, O = 16)

A. 5

B. 15

C. 25

D. 35

E. 50