Class VIII

Rayon is chemically
  1. cellulose
  2. pectin
  3. glucose
  4. amylase
Which one of the following is the petroleum wax?
  1. Paraffin wax
  2. Jonoba wax
  3. Carnauba wax
  4. Bees wax
Which is/are the important raw material(s) required in cement industry?
  1. Gypsum and Clay
  2. Clay
  3. Limestone and Clay
  4. Limestone
Wood is the main raw material for the manufacture of
  1. paint
  2. paper
  3. ink
  4. gun powder
Gypsum is added to cement clinker to
  1. increase the tensile strength of cement
  2. decrease the rate of setting of cement
  3. facilitate the formation of colloidal gel
  4. bind the particles of calcium silicate
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