Question 786:

• JAMB 1993

The air around a petroleum refinery is most likely to contain?

A. CO₂, SO₃ and N₂O
B. CO₂, CO and N₂O
C. SO₂, CO and NO₂
D. PH₃ H₂O and CO₂

Question 787:

• JAMB 1993

Water can be identified by the use of?

A. Anhydrous copper (II) tetraoxosulphate (VI)
B. Anhydrous sodium trioxocarbonate (IV)
C. Potassium heptaoxochromate (VII)
D. Copper (II) trioxocaronate (IV)

Question 788:

• JAMB 1993

The phenomenon whereby sodium trioxocarbonate (IV) decahydrate loses some of its water of crystallization on exposure to the atmosphere is known as?

A. Deliquescene
B. Hygroscopy
C. Effervescence
D. Efflorescence

Question 789:

• JAMB 1993

A student prepares 0.5 M solution each of hydrochloric and ethanoic acids and then measured pH. The result would show that the?

A. PH values are equal
B. HCI solution has a higher pH
C. Sum of the values is 14
D. Ethanoic acid solution has a higher pH

Question 790:

• JAMB 1993

NH₃ + H₃O⁺
→ NH₄⁺ + H₂O. It may be deduced from the reaction above that?

A. A redox reaction has occurred
B. H₃O⁺ acts as an oxidizing agent
C. H₃O⁺ acts as an acid
D. Water acts as ab acid