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1. In an electrochemical cell, polarization is caused by
  • A. Oxygen
  • B. Hydrogen
  • C. Tetraoxosulphate(IV) acid
  • D. Chlorine

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2. The condition required for corrosion to take place is the presence of
  • A. Oxygen and Carbon (IV) oxide
  • B. Water and Oxygen
  • C. Water and Carbon (IV) oxide and Oxygen
  • D. Water and Carbon (IV) oxide

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3. The enzyme used in the hydrolysis of starch to dextrin and maltose is
  • A. Zymase
  • B. Sucrase
  • C. Amylase
  • D. Lactase

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4.In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through
  • A. Concentrated tetraoxosulphate (VI) acid
  • B. Anhydrous calcium chloride
  • C. Calcium oxide
  • D. Sodium hydroxide

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5.The monomer of nylon is
  • A. Hydroxybenzene
  • B. Hexanedioic acid
  • C. Benzene -1,-4-dicarboxylic acid
  • D. Ethane-1,2-diol

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6. The principle of column chromatography is based on the ability of the constituents to
  • A. React with the solvent in the column
  • B. React with each other in the solvent in the column
  • C. Dissolve in each other in the column
  • D. Move at different speeds in the column

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7. Ammonium chloride can be separated from its mixture with common salt by
  • A. Distillation
  • B. Evaporation
  • C. Decantation
  • D. Sublimation

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8. The ability of carbon to form long chains is referred to as
  • A. Alkylation
  • B. Acylation
  • C. Carbonation
  • D. Catenation

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9.The industrial preparation of hydrogen gas from water gas is referred to as
  • A. Bosch process
  • B. Contact process
  • C. Haber process
  • D. Bayer Process

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10.The relative atomic mass of a naturally occurring lithium consisting of 90%\(\frac{7}{3}\)Li and 10%\(\frac{6}{3}\)Li is

  • A. 6.2
  • B. 6.8
  • C. 7.1
  • D. 6.9