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Chemistry JAMB Past Questions

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556

The droplets of water observed around a bottle of milk taken out of the refrigerator is due to the fact that the?

  • A. water vapour in the air around the bottle gains some energy from the bottle
  • B. temperature of the milk drops as it loses heat into the surroundings
  • C. saturated vapour pressure of the milk is equal to the atmospheric pressure
  • D. water vapour in the air around the bottle loses some of its energy to the bottle
View Answer & Discuss (14) JAMB 2010
557

The volume of a given gas is V cm\(^3\) at a pressure P mm Hg. what is the new volume of the gas if the pressure is reduced to half at constant temperature?

  • A. 4 V cm3
  • B. 2 V cm3
  • C. V/2 cm3
  • D. V cm3
View Answer & Discuss (17) JAMB 2010
558

Moving from left to right across a period, the general rise in the first ionization energy can be attributed to the?

  • A. decrease in nuclear charge
  • B. increase in nuclear charge
  • C. decrease in screening effect
  • D. increase in screening effect
View Answer & Discuss (15) JAMB 2010
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559

How many unpaired electron(s) are there in the nitrogen sub-levels?

  • A. 3
  • B. 2
  • C. 1
  • D. none
View Answer & Discuss (14) JAMB 2010
560

The stability of the noble gases is due to the fact that they?

  • A. have no electron in their outermost shells
  • B. have duplet or octet electron configurations
  • C. belong to group zero of the periodic table
  • D. are volatile in nature
View Answer & Discuss (7) JAMB 2010
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