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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

NTA Abhyas 2020 · Chemistry · General Principles and Processes of Isolation of Metals

Which of the following statements is incorrect?

Which of the following statements is incorrect?

Options

  1. ACalamine and siderite are carbonates
  2. BArgentite and cuprite are oxides
  3. CZinc blende and pyrites are sulphides.
  4. DMalachite and azurite are ores of copper

Correct answer

B. Argentite and cuprite are oxides

Step-by-step solution

(A)\left(A\right) Calamine =ZnCO3= ZnC{O}_{3} , Sidereite =FeCO3= FeC{O}_{3}
(B)\left(B\right) Argentite =Ag2S= A{g}_{2}S and Cuprite =Cu2O= C{u}_{2}O
(C)\left(C\right) Zinc blende =ZnS= ZnS , Pyrites =FeS2= Fe{S}_{2}
(D)\left(D\right) Malachite =CuCO3Cu( OH )= CuC{O}_{3}Cu{\left(\text{ OH }\right)}_{2},Azurite, Azurite= 2CuC{O}_{3}Cu{\left(OH\right)}_{2}
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