Question

The percentage of carbon in cast iron varies from

• A. $0.5\text{to}1$
• B. $1\text{to}1.7$
• C. $0.1\text{to}0.5$
• D. $1.7\text{to}4.5$

Answer 1

The correct option is D

$1.7\text{to}4.5$

The explanation for the correct option

(C)$1.7\text{to}4.5$

Cast iron

• It is made by melting pig iron with scrap iron and coke using a hot air blast.
• It is hard and brittle.
• The percentage of carbon in cast iron varies from $1.7\text{to}4.5$.
• It is used for pipe fittings, washers, mining hardware, and machine parts.

The explanation for incorrect option

• The percentage of carbon in cast iron varies from $1.7\text{to}4.5$.
• Hence, options (A), (B), and (D) are incorrect.

So, option (C) is the correct option. The percentage of carbon in cast iron varies from $1.7\text{to}4.5$.