Question

2. state reason for the following

(a)How the properties of a metal can be modified?

(b) What is the composition and use of 'german silver'?

(c) Metal oxides are basic in nature, why?

(d) What is the fraction of gold present in 20 carat gold piece?

the person who write a legit and best answer his parents may live long....and I will mark him as brainly.....​

Answer 1

Answer:

answer given below..

Explanation:

a) Many structural metals undergo some special treatment to modify their properties so that they will perform better for their intended use. This treatment can include mechanical working, such as rolling or forging, alloying and/or thermal treatments. ... Further, many aluminum alloys are strengthened by heat treatment.

b) German Silver is an alloy of copper, zinc and nickel, sometimes also containing lead and tin. It was originally named for its silver-white colour, but the term 'silver' is now prohibited for alloys not containing that metal.

c) Metal oxides are basic in nature because they react with water to form bases.

d) %age of gold in 20 carat = 197164. 16×100 = 83.33%