Post Utme Chemistry Questions
Question 221:
Which of the following statements is true?
- A Metals conduct electricity while non-metals do not
- B Metals have high density, non metals have low density
- C Metals form acid oxides, non-metals are below hydrogen
- D Metals Iose electrons while non metals gain electrons during normal reactions
Question 222:
In the reaction of oxygen with hydrogen to produce water, which of the following statements is true?
- A One atom of hydrogen reacts with two atoms of oxygen to give one molecule of water
- B Two atoms of hydrogen react with two atoms of oxygen to give two molecules of water
- C One molecule of oxygen reacts with one molecule of hydrogen to give two molecules of water
- D One molecule of hydrogen reacts with two molecules of oxygen to give three molecules of water
- E One molecule of oxygen reacts with two molecules of oxygen to give two molecules of water
Question 223:
The number of atoms in one mole of a substance is equal to ____________
- A The atomic number
- B The Avogadro number
- C The gas constant
- D The number of neutrons
- E The number of electrons
Question 224:
Oxidation of concentration hydrochloric acid with manganese (IV) oxide liberates a gas used in the _____________
- A Manufacture of toothpaste
- B Treatment of goiter
- C Vulcanization of rubber
- D Sterilization water
Question 225:
The relative strengths of weak acids can be seen by a comparison of their _____________
- A \(pH\) value
- B Dissociation constants
- C Hydrogen ion concentrations
- D Molarities