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91

How many moles HCL will be required to react with potassium heptaoxodichromate (VI) to produce 3 moles of chlorine?

  • A. 14
  • B. 12
  • C. 11
  • D. 10
View Answer & Discuss (37) JAMB 2000
92
The ratio of the initial to final pressure of a given mass of gas is 1:1.5. Calculate the final volume of the gas if the initial volume was 300 cm3 at the same temperature
  • A. 120 cm3
  • B. 200 cm3
  • C. 450 cm3
  • D. 750 cm3
View Answer & Discuss (22) JAMB 2000
93

The partial pressure of oxygen in a sample of air is 452 mm Hg and the total pressure is 780 mm Hg. What is the mole fraction of oxygen?

  • A. 0.203
  • B. 0.579
  • C. 2.030
  • D. 5.790
View Answer & Discuss (15) JAMB 2000
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
94

The fundamental difference between the three states of matter is the

  • A. shape of their particles
  • B. number of particles in each state
  • C. shape of the container they occupy
  • D. degree of movement of their particles
View Answer & Discuss (12) JAMB 2000
95

Which of the following statement is correct about the periodic table?

  • A. Elements in the same period have the same number of valency electron
  • B. The valence electron of the elements in the same period increase progressively across the period
  • C. Elements in the same group have the same number of electron shells
  • D. The non-metallic properties of the elements tend to decrease across each period
View Answer & Discuss (35) JAMB 2000
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WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts