Chemistry - Metallurgy Question with Solution | TestHub
In the froth flotation method of ore of a d-block metal (M) , ore is first suspended in mixture of oil & water followed by treatment with and compressed air then concentrated ore is obtained. Pure metal is obtained from concentrated ore after roasting, carbon reduction and distillation then which of the following substance given below containing that metal (M). Calamine, Zinc blende, Sphalerite, Brass, Bronze, German silver
Answer:
Solution:
Identify the metal (M): The use of froth flotation with CuSO₄ (an activator) followed by roasting, carbon reduction, and distillation specifically describes the metallurgy of Zinc (Zn), which is a d-block metal.
Analyze the given substances: We need to find how many of the listed substances contain Zinc (Zn):
Calamine: ZnCO₃ (Contains Zn)
Zinc blende / Sphalerite: ZnS (Contains Zn)
Brass: Alloy of Cu and Zn (Contains Zn)
Bronze: Alloy of Cu and Sn (Does NOT contain Zn)
German silver: Alloy of Cu, Zn, and Ni (Contains Zn)
Count: The 5 substances containing Zinc are Calamine, Zinc blende, Sphalerite, Brass, and German silver.
