The form of iron obtained from blast furnace is:

Options

A. Wrought iron
B. Pig iron
C. Cast iron
D. Scrap iron

Explanation

To solve the question regarding the form of iron obtained from a blast furnace, we can break it down into the following steps:

### Step 1: Understand the Process of Iron Production
The blast furnace is a key component in the production of iron. It is used to smelt iron ore into molten iron by combining it with coke and limestone at high temperatures.

**Hint:** Remember that the blast furnace is primarily used for extracting iron from its ore.

### Step 2: Identify the Composition of Iron from Blast Furnace
The iron produced in a blast furnace typically contains a significant amount of carbon, usually ranging from 3.8% to 4.7%. This high carbon content is due to the reduction of iron oxide by carbon monoxide produced from the combustion of coke.

**Hint:** Consider the role of carbon in the properties of the iron produced.

### Step 3: Recognize Impurities in Pig Iron
In addition to carbon, the iron produced from the blast furnace contains various impurities such as sulfur, phosphorus, silicon, and manganese. These impurities can affect the properties of the iron.

**Hint:** Think about how impurities can influence the characteristics of a material.

### Step 4: Define the Type of Iron Produced
The iron obtained from the blast furnace, characterized by its high carbon content and various impurities, is known as pig iron. It is brittle and not suitable for many applications without further processing.

**Hint:** Recall the terminology used in metallurgy for different forms of iron.

### Step 5: Conclusion
Based on the information gathered, the form of iron obtained from the blast furnace is identified as pig iron.

**Final Answer:** The form of iron obtained from the blast furnace is pig iron.