Choose the wrong statement in the following:

Options

A. `TiO_2` is used in the pigment industry
B. `MnO_2` is used in dry battery cells
C. `V_2O_5` catalyses the oxidation of `SO_2` in the manufacture of sulphuric acid
D. The 'silver' UK coins are made of Ag/Ni alloy

Explanation

To solve the question "Choose the wrong statement in the following," we will analyze each of the provided statements one by one to identify which one is incorrect.

### Step-by-Step Solution:

1. **Statement A: TiO2 is used in the pigment industry.**
- Titanium dioxide (TiO2) is widely used as a white pigment in paints, coatings, and plastics due to its excellent opacity and brightness.
- **Conclusion:** This statement is **correct**.

2. **Statement B: MnO2 is used in dry battery cells.**
- Manganese dioxide (MnO2) is indeed used in dry cells, specifically in alkaline batteries, where it acts as a depolarizer at the positive electrode.
- **Conclusion:** This statement is **correct**.

3. **Statement C: V2O5 catalyzes oxidation of SO2 in the manufacture of sulfuric acid.**
- Vanadium pentoxide (V2O5) is known to catalyze the oxidation of sulfur dioxide (SO2) to sulfur trioxide (SO3) in the contact process for sulfuric acid production. It is also an amphoteric oxide.
- **Conclusion:** This statement is **correct**.

4. **Statement D: Sterling silver is made of Ag-Ni alloy.**
- Sterling silver is actually an alloy of silver (Ag) and copper (Cu), typically containing 92.5% silver and 7.5% copper. It is not made of silver and nickel (Ni).
- **Conclusion:** This statement is **incorrect**.

### Final Answer:
The wrong statement is **D: Sterling silver is made of Ag-Ni alloy.**

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