Choose the correct match
A Ferromagnetic (a) water
B. Diamagnetic (b) cobalt
C. Paramagnetic (c) chroomium

Options

A. A-b, B-c,C-a
B. A-c,B-a,C-b
C. A-b,B-a,C-c
D. A-a,B-c,C-b

Answer

To solve the question, we need to match the types of magnetic materials with the correct examples provided. Let's break it down step by step.

### Step 1: Understand the Types of Magnetic Materials
- **Ferromagnetic Materials**: These materials are strongly attracted to magnets. They can retain their magnetic properties even after the external magnetic field is removed. Common examples include iron, cobalt, and nickel.
- **Diamagnetic Materials**: These materials are weakly repelled by magnetic fields. They do not retain any magnetism when the external field is removed. An example of a diamagnetic material is water.
- **Paramagnetic Materials**: These materials are weakly attracted to magnets. They do not retain magnetism when the external field is removed. Examples include aluminum and chromium.

### Step 2: Analyze Each Option
- **A. Ferromagnetic (b) cobalt**: Cobalt is indeed a ferromagnetic material as it is strongly attracted to magnets.
- **B. Diamagnetic (a) water**: Water is a diamagnetic material because it is repelled by magnetic fields.
- **C. Paramagnetic (c) chromium**: Chromium is a paramagnetic material as it is weakly attracted to magnets.

### Step 3: Match the Options
Now, we can match the types of magnetic materials with their corresponding examples:
- **Ferromagnetic** matches with **Cobalt** (A - b)
- **Diamagnetic** matches with **Water** (B - a)
- **Paramagnetic** matches with **Chromium** (C - c)

### Final Answer
The correct matches are:
- A (Ferromagnetic) - b (Cobalt)
- B (Diamagnetic) - a (Water)
- C (Paramagnetic) - c (Chromium)

### Summary of the Matches:
- A (Ferromagnetic) - b (Cobalt)
- B (Diamagnetic) - a (Water)
- C (Paramagnetic) - c (Chromium)

---