______________________ of quicklime produces slaked lime ?

Related Mcqs:

1. How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln ?

   A. 500°C
   B. 750°C
   C. 1000°C
   D. 1500°C

2. One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to_________________?

   A. Adjust the pH of the syrup
   B. Remove the coloring matter from the syrup
   C. Reduce the viscosity of the syrup
   D. Improve the rate of crystallisation of sugar

3. Lime and soda ash are added to water to remove ___________________?

   A. Bicarbonates & sulphates of calcium and magnesium
   B. Undesirable taste and odour
   C. Bacteria
   D. Its corrosiveness

4. High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to__________________?

   A. Flocculate the impurities
   B. Facilitate fast filtration
   C. Both A. and B.
   D. Neither A. nor B.

5. Calcination of limestone is not done in a ______________ kiln for producing lime ?

   A. Vertical shaft
   B. Rotary
   C. Fluidised bed
   D. Fixed bed

6. Use of hydrated lime in water treatment_________________?

   A. Before filtration, reduces the bacterial load on filters
   B. After filtration, combats the corrosiveness of water due to the presence of O2 & CO2
   C. Is to adjust the pH value
   D. All A , B. and C.

7. High temperature carbonisation of coal produces _____________________ ?

   A. Inferior coke compared to low temperature carbonisation
   B. Less of gases compared to liquid products
   C. Larger quantity of tar compared to low temperature carbonisation
   D. None of these

8. Which of the following, when pyrolysed, produces Perchloroethylene ?

   A. Ethylene dichloride
   B. Chlorobenzene
   C. Carbon tetrachloride
   D. Chlorinated paraffin

9. Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an?

   A. Explosive
   B. Soap
   C. Detergent
   D. Analgesic drug

10. Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces ________________?

    A. Nylon-6
    B. Dacron
    C. Polyester
    D. PVC