The pollutants that are likely to be present in an industrial environment are?

A. H₂S,SO₂ and oxides of nitrogen

B. NH₃, HCI and CO

C. CO₂, NH₃ and H₂S

D. dust, NO and CI₂

Four elements P,Q,R and S have 1,2,3, and 7 electrons in their outermost shells respectively. The element which is unlikely to be a metal is?

A. P

B. Q

C. R

D. S

Which of the following gases dissolves in water vapour to produce acid rain during rainfall?

A. Oxygen

B. Carbon (II) oxide

C. Nitrogen

D. Sulphur (IV) oxide

Water for town supply is chlorinated to make it free from?

A. bad odour

B. bacteria

C. temporary hardness

D. permanent hardness

On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure

A. I, II, III and IV

B. I and II only

C. II only

D. I, III and IV only

An emulsion paint consists of ?

A. gas or liquid particles dispersed in liguid

B. liquid particles dispersed in liquid

C. solid particles dispersed in liquid

D. solid particles dispersed in solid

A sample of orange juice is found to have a pH of 3.80. What is he concentration of the hydroxide ion in the juice?

A. 1.6 x 10^-4

B. 6.3 x 10^-11

C. 6.3 x 10^-4

D. 1.6 x 10^-11

Arrange HCI, CH₃COOH, C₆H₅CH₃ in order of increasing conductivity.

A. HCI, CH₃COOH, C₆H₅CH₃

B. C₆H₅CH₃, HCI, CH₃COOH

C. C₆H₅CH₃, CH₃COOH, HCI

D. CH₃COOH, C₆H₅CH₃, HCI

How many grams of H₂SO₄ are necessary for the preparation of 0.175 dm³ of M 6.00 M H₂SO₄?

(S = 32.06, O = 16.00 H = 1.00)

A. 206.0 g

B. 103.0 g

C. 98.1 g

D. 51.5 g

Copper (II) tetraoxosulphate (VI) solution is electrolyzed using carbon electrodes. Which of the following are produced at the anode and cathode respectively ?

A. Copper and oxygen

B. Oxygen and copper

C. Hydrogen and copper

D. Copper and hydrogen