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The d & f Block Elements — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements5 Marks
Question
Match the compounds/elements given in Column I with uses given in Column II.
 
Column I (Compound/element)
 
Column II (Use)
(i)
Lanthanoid oxide
(a)
Production of iron alloy
(ii)
Lanthanoid
(b)
Television screen
(iii)
Misch metal
(c)
Petroleum cracking
(iv)
Magnesium based alloy is constituent of
(d)
Lanthanoid metal + iron
(v)
Mixed oxides of lanthanoids are employed
(e)
Bullets
 
 
(f)
In X-ray screen
 
✓

Answer

 
Column I (Compound/element)
 
Column II (Use)
(i)
Lanthanoid oxide
(b)
Television screen
(ii)
Lanthanoid
(a)
Production of iron alloy
(iii)
Misch metal
(d)
Lanthanoid metal + iron
(iv)
Magnesium based alloy is constituent of
(e)
Bullets
(v)
Mixed oxides of lanthanoids are employed
(c)
Petroleum cracking
Explanation:
Compound/ element- use
  1. Lanthanoid oxide /television screen
  2. Lanthanoid – production of iron alloy
  3. Misch metal- Lanthanoid metal + iron
  4. Magnesium based alloy- bullets
  5. Mixed oxide of lanthanoids are employed – petroleum cracking.

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