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Chemistry Past Questions

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4456

If a salt weighs 2g and upon exposure to the atmosphere weighs 1.5g, this is as a result of 

  • A. hygroscopy
  • B. effervescence
  • C. efflorescence
  • D. deliquescence
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4457

The compound of Copper used as a fungicide is

  • A. CuCO\(_3\)
  • B. Cu(NO\(_3\))\(_2\)
  • C. CuSO\(_4\)
  • D. CuCl\(_2\)
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4458

The percentage of hydrogen in the sixth member of the class of the aliphatic alkanes is  [H =1, C =12 ]

  • A. 41.34
  • B. 59.54
  • C. 16.28
  • D. 83.72
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4459

The law which states that a pure chemical compound, no matter how it is made, will be made up of the same elements contained in the same proportion by mass is

  • A. law of conservation of masses
  • B. law of definite proportion
  • C. law of multiple proportion
  • D. law of reciprocal proportion
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4460

The stability of atomic nucleus is determined by ratio of 

  • A. Neutron/electron
  • B. Neutron/proton
  • C. positron/neutron
  • D. electron/proton
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