Match the properties givens in Column I with the metals given in Column II.
`{:(,"Column I ( Porperty)",,"Column II(Metal) "),((i),"An element which can show"+8"oxidation state",(a),Mn),((ii),"3d block element that can show upto "+7"oxidation state",(b),Cr),((iii),"3d block element with highest melting point",(c ) ,Os),(,,(d),Fe):}`

Answer

To solve the matching question, we will analyze each property in Column I and identify the corresponding metal from Column II based on their oxidation states and properties.

### Step-by-Step Solution:

1. **Property (i): An element which can show +8 oxidation state**
- Among the metals listed, **Osmium (Os)** is known to exhibit a +8 oxidation state. This is due to its ability to lose 8 electrons from its electronic configuration, which is [Xe] 4f14 5d6 6s2. Therefore, the correct match for this property is:
- **(i) - (c) Os**

2. **Property (ii): 3d block element that can show up to +7 oxidation state**
- **Manganese (Mn)** is the 3d block element that can show a +7 oxidation state. Its electronic configuration is [Ar] 3d5 4s2, and it can lose all 7 electrons (5 from 3d and 2 from 4s) to achieve this oxidation state. Thus, the correct match is:
- **(ii) - (a) Mn**

3. **Property (iii): 3d block element with the highest melting point**
- **Chromium (Cr)** has the highest melting point among the 3d block elements. Its electronic configuration is [Ar] 3d5 4s1, and it exhibits extra stability due to its half-filled d-subshell. Therefore, the correct match is:
- **(iii) - (b) Cr**

### Final Matches:
- (i) - (c) Os
- (ii) - (a) Mn
- (iii) - (b) Cr