1.Which among the following is responsible for depletion of Ozone? [A] Carbon monoxide [B] Carbon dioxide [C] Chlorofluoro carbon [D] Mercuric oxide
Correct Answer: A [Zinc and Copper ] Notes: Brass is an alloy of Copper and Zinc, in proportions which can be varied to achieve varying mechanical and electrical properties. The proportions of Zinc and Copper can vary to create different types of brass alloys with varying mechanical and electrical properties.
c
