Question

Identify the correct statement from the following: 
UK 'copper' coins are Cu/Ni alloy. AgBr has special light-sensitive properties. Ti\(^{2+}\), V\(^{2+}\), Cr\(^{2+}\) are strong oxidising agents. The magnetic moment of V\(^{2+}\) is 2.84 BM.

• A. UK 'copper' coins are Cu/Ni alloy
• B. AgBr has special light-sensitive properties
• C. Ti\(^{2+}\), V\(^{2+}\), Cr\(^{2+}\) are strong oxidising agents
• D. The magnetic moment of V\(^{2+}\) is 2.84 BM

Hint:

Light-sensitive properties of silver halides like AgBr are crucial in traditional photography, where they form the basis of developing and fixing images.

Answer 1

The Correct Option is B

Evaluate each statement for factual accuracy. - AgBr is indeed known for its light-sensitive properties, commonly used in photographic films due to its ability to decompose to silver and bromine upon exposure to light. 
Conclusion: The statement about AgBr's light-sensitive properties is correct, making option (2) the correct answer.

Answer 2

To solve the problem, we need to identify the correct statement from the given options.

1. Analyzing the Options:

Option 1: "UK 'copper' coins are Cu/Ni alloy" – This statement is incorrect UK coins, particularly the "copper" coins, are made from a copper-nickel alloy, not pure copper. However, the composition includes a mixture of copper and nickel, making this technically a copper-nickel alloy rather than pure copper.

Option 2: "AgBr has special light-sensitive properties" – This statement is correct. Silver bromide (AgBr) is known for its light-sensitive properties, which is why it is used in photographic films and plates.

Option 3: "Ti²⁺, V²⁺, Cr²⁺ are strong oxidizing agents" – This statement is incorrect. These ions (Ti²⁺, V²⁺, Cr²⁺) are actually reducing agents, not oxidizing agents.

Option 4: "The magnetic moment of V²⁺ is 2.84 BM" – This statement is incorrect. The magnetic moment of V²⁺ (vanadium ion with a 2+ charge) is typically around 1.73 BM, not 2.84 BM. The provided value is not correct.

2. Conclusion:
The correct statement is that AgBr has special light-sensitive properties.

Final Answer:
The correct option is (B) AgBr has special light-sensitive properties.