Related Questions

Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the
A Decolourisation of sugar
B Solvent recovery from air and gases
C Absorption of gases and vapor
D Electrode manufacture
Sulphur dioxide bleaches colouring matter by :
A Reduction
B Dehydration
C Decomposition
D Oxidation
Those substances which have so far not been resolved by any means into other substances of simpler form are called
A Atoms
B Compounds
C Elements
D Molecules
The charcoal used to decolourise brown sugar solution is
A Wood charcoal
B Coconut charcoal
C Animal charcoal
D Sugar charcoal
Charcoal is used in water treatment as a/an
A Absorbent
B Coagulant
C Solvent
D Adsorbent
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
A Adsorbs
B Oxidises
C Reduces
D Converts
Charcoal can be made at home by burning
A wood in absence of air
B coal in absence of air
C coal in an insufficient supply of air
D wood in an insufficient supply of air
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
A 15, 75, 10
B 75, 10, 15
C 10, 15, 75
D 10, 75, 15
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
A Glass
B Cement
C Paint
D Gun powder

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