Oxides And Trioxocarbonate (iv) Salts Jamb Chemistry Past Questions
Question 1
Which of the following tests would confirm-unequivocally that a solution X contain the sulphate ion if it gives with?
- A. silver nitrates solution, a white precipates insoluble in dilute HNO3
- B. barium chloride solution, a white precipitate insoluble in dilute H2SO4
- C. barium chloride solution, a white precipitate soluble in dilute HCl
- D. barium chloride solution a white precipitate soluble in dilute ammonia
- E. barium chloride solution a white precipitate insoluble in dilute HCl
Question 3
SO\(_3\) is not directly dissolved in water in the industrial preparation of H\(_2\)SO\(_4\) by the contact process because
- A. SO\(_3\) is an acidic gas
- B. Acid is usually added to water and not water to acid
- C. The reaction between SO\(_3\) and water is violently exothermic
- D. SO\(_3\) does not dissolve readily in water
Question 4
Which of the following is a set of neutral oxides?
- A. N\(_2\)O, H\(_2\)O, CO
- B. N\(_2\)O, SO\(_2\), CO
- C. N\(_2\)O, Na\(_2\)O, ZnO
- D. N\(_2\)O, SO\(_3\), NO
Question 5
Sodium carbonate crystals on exposure to a dry atmosphere change to a white powder. This phenomenon is known as?
- A. deliquescence
- B. hygroscopy
- C. oxidation
- D. efforescence
- E. sublimation
