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zinc oxide
zinc phosphide
potassium cyanide
lead nitrate
The chemical name of table salt is
The chemical substance present in bones and teeth is :
The chemical that is used to ripen mangoes is
The chemical used in embalming biological materials is
The chief constituent of natural gas is:
The chief raw material used for manufacturing Rayon is:
The chief source for the production of nitrogeneous fertilizers is:
The colour of an opaque object is due to the colour it
The colour of the carrots is due to the presence of
The colour of the ocean seems to be blue as the sunlight falling on it is