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Chemistry Past Questions

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4586

CH\(_3\)C ≡ CCH(CH\(_3\))\(_2\)

The IUPAC nomenclature of the compound above is 

  • A. 3-ethyl but-2-yne
  • B. 4-methylpent-2-yne
  • C. 2-ethyl but-2-yne
  • D. 2-methyl pent-2-yne
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4587

In the laboratory preparation of oxygen using potassium trioxochlorate(V), tetraoxomanganate (VII), usually not recommended in modern laboratory because

  • A. it forms explosive mixture with carbonaceous materials
  • B. it is explosive.
  • C. it reacts with the catalyst
  • D. it is hazardous
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4588

The type of bond between copper(II) tetraamine and chlorine in [Cu(NH\(_3\))\(_4\)]Cl\(_2\)

  • A. dative
  • B. van der waals
  • C. ionic
  • D. covalent
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4589

Mg\(_{(s)}\)  +   2HCl\(_{(aq)}\) MgCl\(_2\)\(_{(aq)}\) +  H\(_2\)\(_{(g)}\)

In the reaction above, magnesium is a reducing agent because

  • A. oxidized
  • B. reduced
  • C. a metal
  • D. a solid
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4590

An example of a physical change is

  • A. addition of water to calcium oxide
  • B. corrosion of iron
  • C. dissolving sodium chloride in water
  • D. burning of charcoal
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