Question

Select the odd one out and justify your answer​
Fe, Pb, Al and Zn​

Answer 1

Odd one out amongst the given options is- Lead (Pb)​ ​

Lead reacts with dilute sulphuric acid or hydrochloric acid and forms an insoluble coating of lead sulphate or lead chloride, which prevents the production of hydrogen gas further.​

$Pb+2HCl\to PbC{l}_2+H_2$​ ​

While Fe, Al, and Zn react with dilute sulphuric acid or hydrochloric acid to form respective salts and liberate hydrogen gas.​