The most convenient method to protect the bottom of the ship made of iron is 

1. coating it with red lead oxide

2. white tin plating 

3. connecting it with Mg block

4. connecting it with Pb block

Subtopic:  Corrosion |
From NCERT
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The Zn acts as sacrificial or cathodic protection to prevent rusting of iron because:

1. EOP of Zn < EOP of Fe

2. EOP of Zn > EOP of Fe

3. EOP of Zn = EOP of fe

4. Zn is cheaper than iron

Subtopic:  Corrosion |
 74%
From NCERT
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The cell reaction of micro electrochemical cell formed during rusting of iron is:-

1.  O2(g) + 4H(aq)  + 4e-  2H2O (l)

2. 4Fe+2(aq)  + O2(g) + 2H2O(l)  4FeO + 4H(aq)

3. 2Fe(s) + O2(g) + 4H°(aq) 2Fe+2(aq)  + 2H2O(aq)

4.  Fe(s) Fe+2(aq) + 2e-

Subtopic:  Corrosion |
 65%
From NCERT
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Hints
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NEET 2023 - Target Batch - Aryan Raj Singh