Q1: Which of the following has the highest density and the lowest melting point ?

ANS:C - Lead

Among the options provided, lead has the highest density and the lowest melting point. Explanation:

• Lead has a high density of approximately 11,340 kilograms per cubic meter (kg/m³), making it one of the densest common metals.
• Lead also has a relatively low melting point of about 327.5°C (621.5°F), which is significantly lower than the melting points of stainless steel, titanium, and aluminium.
• Stainless steel typically has a density ranging from 7,750 to 8,050 kg/m³, depending on the specific alloy composition, while its melting point is much higher, typically above 1,370°C (2,500°F).
• Titanium has a density of around 4,500 kg/m³, making it significantly lighter than lead, and its melting point is substantially higher, typically around 1,668°C (3,034°F).
• Aluminium has a lower density than lead, typically around 2,700 kg/m³, and its melting point is higher, around 660.3°C (1,220.5°F).