Question:
Choose the wrong statement in the following
Choose the wrong statement in the following
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Modern coins rarely contain silver — mostly Cu-Ni alloys.
Updated On: May 2, 2026
- TiO$_2$ is used in the pigment industry
- MnO$_2$ is used in dry battery cells
- V$_2$O$_5$ catalyses the oxidation of SO$_2$ in the manufacture of sulphuric acid
- Ziegler catalyst is used in the manufacture of high density polyethylene
- The ‘silver’ UK coins are made of Ag/Ni alloy
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The Correct Option is
Solution and Explanation
Concept: Applications of transition metal compounds
---
Step 1: Analyze each option
(A) TiO$_2$:
• Used as white pigment
• High refractive index → excellent opacity
• Statement is correct --- (B) MnO$_2$:
• Used in dry cells (Leclanché cell)
• Acts as depolarizer
• Statement is correct --- (C) V$_2$O$_5$:
• Catalyst in Contact Process
• Oxidizes SO$_2$ → SO$_3$
• Statement is correct --- (D) Ziegler catalyst:
• Used for polymerization of ethene
• Produces HDPE (high density polyethylene)
• Statement is correct --- (E) Silver UK coins:
• Modern UK coins are not made of Ag/Ni
• Made of Cu-Ni alloy
• Statement is incorrect --- Final Answer: \[ \boxed{\text{(E)}} \]
---
Step 1: Analyze each option
(A) TiO$_2$:
• Used as white pigment
• High refractive index → excellent opacity
• Statement is correct --- (B) MnO$_2$:
• Used in dry cells (Leclanché cell)
• Acts as depolarizer
• Statement is correct --- (C) V$_2$O$_5$:
• Catalyst in Contact Process
• Oxidizes SO$_2$ → SO$_3$
• Statement is correct --- (D) Ziegler catalyst:
• Used for polymerization of ethene
• Produces HDPE (high density polyethylene)
• Statement is correct --- (E) Silver UK coins:
• Modern UK coins are not made of Ag/Ni
• Made of Cu-Ni alloy
• Statement is incorrect --- Final Answer: \[ \boxed{\text{(E)}} \]
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