Question

The percentage composition of copper in white brass and red brass is __________ and _______ respectively.

(a) 40%, 55%

(b) 55%, 40%

(c) 10%, 85%

(d) 85%, 10%

This question was addressed to me in an online quiz.

Asked question is from Non-Ferrous Metals and Alloys in chapter Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

Answer 1

Right choice is (c) 10%, 85%

The explanation is: The percentage composition of copper in white brass and red brass is respectively 10% and 85% respectively. Red brass contains 15% zinc with 85% copper while white brass contains 90% zinc and 10% copper.