Oxygen gas can be prepared by heating?

• A. ammonium trioxonitrate (V)
• B. ammonium trioxonitrate (III)
• C. ppotassium trioxonitrate (V)
• D. mamgamese (IV) oxide

Which of the following statements is TRUE of the complete hydrolysis of a glycerine by sodium hygroxide?

• A. 3 moles ofNaOH are required for each mole of glyceride
• B. 3 moles of glycerol are produced
• C. Only one mole of soap is formed
• D. concentrated H2SO4 is essential for the completion of the reaction

Addition of aqueous ammonia to a solution of Zn⁺ gives a white precipitate which dissolves in an excess of ammonia because?

• A. zinc is amphoteric
• B. zinc hydroxide is readily soluble
• C. zinc forms a complex which is readily soluble in excess ammonia
• D. ammonia solution is a strong base

How many grams of bromine will be required to completely react with 10 g of propyne? (C = 12, H = 1, Br = 80)

• A. 20 g
• B. 40 g
• C. 60 g
• D. 80 g

Calculate the volume of carbon (IV)oxide measured at s.t.p, produced when 1 kg of potassium hydrogen trioxocarbonate (IV) is totally decomposed by heat? (G.M.V. at s.t.p 22.4 dm3, K = 39, O = 16, C = 12, H = 1)

• A. 28 dm³
• B. 56 dm³
• C. 112 dm³
• D. 196 dm³

Which of the following, in clear solution, forms a white precipitate when carbon (IV) oxide is bubbled into it for a short time?

• A. KOH
• B. NaOH
• C. Ca(OH)₂
• D. AI(OH)₃

Which of the following are mixtures? i, Petroleum ii, Rubber latex iii. Vulcanizer's solution iv, Carbon (II)sulphide

• A. i, ii and iii
• B. i, ii and iv
• C. i and ii only
• D. i and iv

Copper (II) tetraoxosulphate (IV) is widely used as a?

• A. fertilizer
• B. fungicide
• C. disinfectant
• D. purifier

Magnesium (IV) oxide is known to hasten the decomposition of hydrogen peroxide. Its main action is to?

• A. increase the surface area of the reactants
• B. increase the concntration of the reactants
• C. lower the activation energy for the reaction
• D. lower the heat of reaction, ∆H, for the reaction

Angiosperms and gymnosperms belong to the plants group known as

• A. schizophyta
• B. bryophyta
• C. pteridophyta
• D. spermatophyta