The products of fermentation of sugar are

• A. carbon(IV) oxide and water
• B. ethanol and carbon (IV) oxide
• C. ethanol and water
• D. ethanol and enzymes

Consider the reaction represented by the following equation: Zn(s) + 2HCI(aq) → ZnCI₂(aq) + H₂(g) what volume of hydrogen gas is produced at s.t.p. when 3.25 g of zinc reacts with excess dilute HCI? [Zn = 65, Molar gas volume at s.t.p. = 22.4 dm³]

• A. 1.12 dm³
• B. 2.24dm³
• C. 4.48dm³
• D. 8.96dm³

The petroleum fraction that is used in heating furnaces in industries is

• A) diesel oil
• B) gasoline
• C) kerosene
• D) lubricating oil

Which of the following is a set of waste product in the Solvay Process for the manufacture of sodiurn trioxocarbonate(IV)?

• A. Ammonium chloride
• B. Brime
• C. Calcium chloride
• D. Calcium oxide

The function of Sulphur during the vulcanization of rubber is to

• A) act as catalyst for the polymerization of rubber molecules
• B) convert rubber from thermosetting to thermoplastic polymer
• C) from chains which bind rubber molecules together
• D) break down rubber polymer molecule

The gas that can be dried using concentrated tetraoxosulphate (VI) acid is

• A. hydrogen bromide
• B. Sulphur (IV) oxide
• C. hydrogen sulphide
• D. ammonia

The IUPAC name for CH3CH2COOCH2CH3is

• A) methylpropanoate
• B) ethylethanoate
• C) ethylpropanoate
• D) methylethanoate

An electron described by the quantum number, n = 4, L = 3 can be located in what orbital?

• A) 4f
• B) 3s
• C) 3d
• D) 4p

A major effect of oil pollution in coastal waters is the?

• A. destruction of marine life
• B. desalination of the water
• C. increase in the acidity of the water
• D. detoxification of the water

What name is given to each of the following? The

(a) irregular random movement of smoke particles in air.

(b) existence of an element in various forms in the same physical-state

(c) disintegration of atomic nuclei, accompanied with radiation emission.

(d) conversion of a solid difitrunto vapour without melting.