2. Questions Bank
  3. NEET
  4. Chemistry
  5. Metallurgy / धातुकर्म

NEET Chemistry Metallurgy / धातुकर्म Question Bank Self Evaluation Test - General Principals and Process of Isolation of Elements

  • question_answer
    In the isolation of metals, calcination process usually results in:

    A) metal hydroxide  

    B) metal sulphide

    C) metal oxide      

    D) metal carbonate

    Correct Answer: C

    Solution :

    [c] Calcination is the process of converting an ore into its oxide by heating it strongly below its melting point either in absence or limited supply of air. It is usually done to convert metal carbonates and hydroxides to their respective oxides. \[\underset{Limestone}{\mathop{CaC{{O}_{3}}}}\,\xrightarrow{\Delta }\underset{\begin{smallmatrix}  Calcium\text{ } \\  oxide \end{smallmatrix}}{\mathop{CaO}}\,+C{{O}_{2}}\uparrow \] \[\underset{Malachite}{\mathop{CuC{{O}_{3}}}}\,.Cu{{(OH)}_{2}}\xrightarrow{\Delta }2CuO+{{H}_{2}}O\uparrow +C{{O}_{2}}\uparrow \]


You need to login to perform this action.
You will be redirected in 3 sec spinner