JEE Chemistry 2025 Question with Solution

Given: List-I contains Bronze, Brass, UK silver coin, and Stainless Steel. List-II contains their constituent materials.

Find: The correct matching between the alloys and their components.

Bronze is an alloy of $\text{Cu}$ and $\text{Sn}$, so (A) \rightarrow (IV).

Brass is an alloy of $\text{Cu}$ and $\text{Zn}$, so (B) \rightarrow (III).

UK silver coin corresponds to $\text{Cu}, \text{Ni}$, so (C) \rightarrow (I).

Stainless steel contains $\text{Fe}, \text{Cr}, \text{Ni}, \text{C}$, so (D) \rightarrow (II).

Therefore, the correct matching is (A)-(IV), (B)-(III), (C)-(I), (D)-(II).

The correct option is B.

Given: Standard compositions of common alloys are to be recalled.

Find: The correct option by direct identification.

Use the standard alloy pairs:

• Bronze $= \text{Cu} + \text{Sn}$
• Brass $= \text{Cu} + \text{Zn}$
• UK silver coin $= \text{Cu} + \text{Ni}$
• Stainless steel $= \text{Fe} + \text{Cr} + \text{Ni} + \text{C}$

Matching these immediately gives (A)-(IV), (B)-(III), (C)-(I), (D)-(II).

Hence, the correct option is B.