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  • Which fertilizers promotes fast growth and development of plants?

    phosphorus fertilizer
    all the answers are correct
    potassium fertilizer
    Nitrogen fertilizers
  • Which one is not used to make ceramics?

    feldspar
    silicates
    hydrated aluminum silicate
    Stones
  • The molecular formula of hydrated aluminum silicate is ______.

    Al2O3.SiO2.2H2O
    Al2O3.SiO2.2H2
    Al2O3.SiO2
    Al2O3
  • The coating forms a thin layer over the surface. This process is termed as ______.

    smelting
    besimerization
    pulverization
    Glazing
  • The substance which is not affected by acid, alkali or other chemicals is ______.

    ceramics
    wood
    cement
    limestones
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