Problem

Problem

A metal MM which is not affected by strong acids like conc. HNO3\text{HNO}_3 , conc. H2SO4\text{H}_2\text{SO}_4 and conc. solution of alkalis like NaOH\text{NaOH} , KOH\text{KOH} forms MCl3\text{MCl}_3 , which finds use for tanning in photography? The metal MM is : a. Ag b. Hg c. Au d. Cu
Intuitive explanation

This problem tests your knowledge of metal reactivity and chemical behavior. The key insight is that a metal resistant to strong oxidizing acids and bases is likely a noble metal, and you need to match that property with the compound MCl3\text{MCl}_3 and its industrial applications. Think about which metals are famously "passive" to harsh chemicals yet form stable +3 chlorides used in real-world processes like tanning and photography.

Intuitive explanation

This problem tests your knowledge of metal reactivity and chemical behavior. The key insight is that a metal resistant to strong oxidizing acids and bases is likely a noble metal, and you need to match that property with the compound MCl3\text{MCl}_3 and its industrial applications. Think about which metals are famously "passive" to harsh chemicals yet form stable +3 chlorides used in real-world processes like tanning and photography.

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