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JEE Main 202126 FebruaryMorning Shift
Exam
JEE Main
Year
2021
Date
26 February
Shift
Morning Shift
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2021 · 26 February · Morning Shift · Chemistry · General Principles and Processes of Isolation of Metals

Match List- I with List- II . List- I (Ore) List- II (Element...

Match List-II with List-IIII.

List-II
(Ore)		 List-IIII
(Element Present)
\left(a\right)</td><td>Kernite</td><tdstyle="text−align:center;">(p)</td> <td>Kernite</td> <td style="text-align: center;">\left(p\right) Tin
\left(b\right)</td><td>Cassiterite</td><tdstyle="text−align:center;">(q)</td> <td>Cassiterite</td> <td style="text-align: center;">\left(q\right) Boron
\left(c\right)</td><td>Calamine</td><tdstyle="text−align:center;">(r)</td> <td>Calamine</td> <td style="text-align: center;">\left(r\right) Fluorine
\left(d\right)</td><td>Cryolite</td><tdstyle="text−align:center;">(s)</td> <td>Cryolite</td> <td style="text-align: center;">\left(s\right) Zinc

Choose the most appropriate answer from the options given below:

Options

  1. A(a)→(r),(b)→(p),(c)→(q),(d)→(s)\left(a\right) \to \left(r\right), \left(b\right) \to \left(p\right), \left(c\right) \to \left(q\right), \left(d\right) \to \left(s\right)
  2. B(a)→(q),(b)→(s),(c)→(p),(d)→(r)\left(a\right) \to \left(q\right), \left(b\right) \to \left(s\right), \left(c\right) \to \left(p\right), \left(d\right) \to \left(r\right)
  3. C(a)→(p),(b)→(r),(c)→(s),(d)→(q)\left(a\right) \to \left(p\right), \left(b\right) \to \left(r\right), \left(c\right) \to \left(s\right), \left(d\right) \to \left(q\right)
  4. D(a)→(q),(b)→(p),(c)→(s),(d)→(r)\left(a\right) \to \left(q\right), \left(b\right) \to \left(p\right), \left(c\right) \to \left(s\right), \left(d\right) \to \left(r\right)

Correct answer

D. (a)→(q),(b)→(p),(c)→(s),(d)→(r)\left(a\right) \to \left(q\right), \left(b\right) \to \left(p\right), \left(c\right) \to \left(s\right), \left(d\right) \to \left(r\right)

Step-by-step solution

Kernite =Na2B4O7⋅4H2O= {Na}_{2}{B}_{4}{O}_{7} \cdot 4{H}_{2}O

The chemical formula for Kernite is =Na2B4O7⋅4H2O= {Na}_{2}{B}_{4}{O}_{7} \cdot 4{H}_{2}O. It contains boron.

Cassiterite =SnO2= {SnO}_{2}

Cassiterite is an ore of Sn.It is also called tinstone and has molecular formula of SnO2{SnO}_{2}​.

Calamine =ZnCO3= {ZnCO}_{3}

Calamine is an ore of zinc. It is zinc carbonate ZnCO3​.

Cryolite =Na3AlF6= {Na}_{3}{AlF}_{6}, which consists of Aluminium, Sodium & Fluorine.

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