Question

Match the following :

	Ore		Formula
A	Fe3O4	I	Magnesite
B	MgCO3	II	Magnetite
C	ZnS	III	Cinnabar
D	Hg2S	IV	Zinc Blende

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-I, C-III, D-IV
• C. A-II, B-I, C-IV, D-III
• D. A-I, B-II, C-IV, D-III

Answer 1

The Correct Option is C

Ore-Formula Matching:

• \( \text{Fe}_3\text{O}_4 \): This is magnetite, a common iron ore. Thus, \( \text{(a)} \) matches with \( \text{(ii)} \).
• \( \text{MgCO}_3 \): This is magnesite, a magnesium carbonate mineral. Thus, \( \text{(b)} \) matches with \( \text{(i)} \).
• \( \text{ZnS} \): This is zinc blende, a zinc sulfide mineral. Thus, \( \text{(c)} \) matches with \( \text{(iv)} \).
• \( \text{Hg}_2\text{S} \): This is cinnabar, a mercury sulfide mineral. Thus, \( \text{(d)} \) matches with \( \text{(iii)} \).

Correct Matching:

\[ \text{(a)} \rightarrow \text{(ii)}, \quad \text{(b)} \rightarrow \text{(i)}, \quad \text{(c)} \rightarrow \text{(iv)}, \quad \text{(d)} \rightarrow \text{(iii)}. \]

Final Answer: The correct option is \( \mathbf{(3)} \), which corresponds to the matching: \( \mathbf{(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)} \).