Curd and sour substances should not be kept in brass and copper vessels because when acid reacts with metal such as brass and copper then salt is formed and hydrogen gas is released . which gas is usually liberated when an acid reacts with a metal ? Illustrate with an example . how willyou test for the presence of this gas.

gopikapolajr. Curd has lactic acid. A sour substance such as lemon has citric acid. We know acids react with active metals to give salt and hydrogen. Therefore when curd and sour substance are kept in brass and copper vessels they react with the elements forming respective salt and hydrogen. So we should not keep them in brass and copper vessels.

Copper and brass vessels are cleaned with lemon because lemon contains citric acid and non metals are electron gainers so it cannot produce hydrogen gas when react with acid there for non metals do not react with acid so that's why Copper and brass vessels are cleaned with lemon.Citric acid in lemon juice etches away copper oxide that gives the.

Hindi translation of 'brass' Word Frequency brass /brɑːs , bræs ब्रास्, ब्रैस्/ 1. uncountable noun Brass is a yellow metal made from copper and zinc. पीतल mn.shining brass buttons. 2. plural noun The brass is the section of an orchestra which consists of brass wind instruments such as trumpets and horns. पीतल का वाद्ययंत्र mn

Formable Easy-to-Machine 353 Brass Sheets and Bars. 353 brass is more formable than 385 brass while maintaining good machinability. Commonly called engraver’s brass, it’s well suited for fabrication processes such as knurling and threading. Use it to make nuts, gears, drawer pulls, and hinges.