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Chemistry Past Questions

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4126

An organic compound which liberate carbon(iv)oxide from trioxocarbonate(iv) solution is likely to be?

  • A. C\(_2\)H\(_5\)OH
  • B. C\(_3\)H\(_4\)
  • C. C\(_6\)H\(_6\)
  • D. CH\(_3\)COOH
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4127

Addition of sodium chloride to water to form a solution would  lead to?

  • A. increase in freezing point and increase the boiling point
  • B. increase in freezing point and decrease the boiling point
  • C. decrease in freezing point and decrease the boiling point
  • D. decrease in freezing point and increase the boiling point
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4128

A chemical widely used as a fertilizer is?

  • A. galena
  • B. bauxite
  • C. emerald
  • D. nitrochalk
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4129

On the basis of the electrochemical series, which of these ions will show the greater tendency to be discharged at the cathode in an electrolytic cell

  • A. cu\(^{2+}\)
  • B. sn\(^{2+}\)
  • C. fe\(^{2+}\)
  • D. zn\(^{2+}\)
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4130

Addition of charcoal to the filter bed of sand during water treatment for township supply is to?

  • A. prevent goiter
  • B. prevent tooth decay
  • C. remove odour
  • D. kill germs
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