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General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements5 Marks
Question
Match the items of Column I with items of Column II and assign the correct code:
 
Column I
 
Column II
$(A)$
Sapphire
$(1)$
$Al_2O_3$
$(B)$
Sphalerite
$(2)$
$NaCN$
$(C)$
Depressant
$(3)$
$CO$
$(D)$
Corundum
$(4)$
$ZnS$
 
 
$(5)$
$Fe_2O_3$
  1. $A (3) B (4) C (2) D (1)$
  2. $A (5) B (4) C (3) D (2)$
  3. $A (2) B (3) C (4) D (5)$
  4. $A (1) B (2) C (3) D (4)$
✓

Answer

 
Column I
 
Column II
$(A)$
Sapphire
$(3)$
$CO$
$(B)$
Sphalerite
$(4)$
$ZnS$
$(C)$
Depressant
$(2)$
$NaCN$
$(D)$
Corundum
$(1)$
$Al_2O_3$
  1. $A (3) B (4) C (2) D (1)$
Explanation:
  1. Sapphire is a gemstone which contains $Co.$
  2. Molecular formula of sphalerite is $ZnS.$
  3. $NaCN$ is used as a depressant in froth floatation method.
  4. Molecular formula of corundum is $Al_2O_3.$

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