Question

Identify the metal X and Y from the characteristics mentioned in the table given below.

$\begin{array}{cc}\text{X}& \text{Y}\\ \text{Does not react with water and oxygen}& \text{Best conductor of electricity}\\ \text{Highly ductile material}& \text{Used to make ornaments}\\ \text{Most malleable substance}& \text{Best conductor of heat}\end{array}$

• A. X:- Copper Y:- Aluminium
• B. X:- Sodium Y:- Silver
• C. X:- Gold Y:- Silver
• D. X:- Gold Y:- Potassium

Answer 1

The correct option is C

X:- Gold

Y:- Silver

X:- Gold

(a) It does not react with oxygen and it is chemically unreactive. Therefore it is called noble metal.

(b) It is a highly ductile material as 1 g of gold can be drawn into a wire of length 2 km.

(c) It is the most malleable metal as it can be beaten into thin sheets.

Y:- Silver

(a) It is the best conductor of heat and electricity.

(b) Gold, silver and platinum are used to make ornaments because these metals are chemically unreactive. Due to this these metals do not undergo corrosion and maintains their metallic lustre for a longer time.