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Chemistry Past Questions

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4661

Both Na\(^+\) and K\(^+\) have 

  • A. tendency to give electrons
  • B. positive reduction potential
  • C. tendency to accept electrons
  • D. negative oxidation potential
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4662

If a gas occupies a volume of 400cm\(^3\) at a temperature of 400K and a pressure of 1 atm, at what temperature and pressure would its volume be 200cm\(^3\)?

  • A. 800 K and 1 atm
  • B. 800 k and 0.5 atm
  • C. 200 k and 1 atm
  • D. 200 k and 0.5 atm
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4663

The nucleus of a hydrogen atom consists of 

  • A. one proton only
  • B. one proton and one neutron
  • C. one neutron only
  • D. one electron only
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4664

If acidified K\(_2\)Cr\(_2\)O\(_7\) acts as an oxidizing agent, the colour changes from

  • A. orange to red
  • B. yellow to green
  • C. orange to green
  • D. yellow to red
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4665

Which of the following elements is a metalloid?

  • A. Aluminium
  • B. Selenium
  • C. Phosphorus
  • D. Sodium
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