state gov Kerala PSC Degree (Common Preliminary Examination) Mock Test Series 2025 General Science Chemistry Electrochemistry
With reference to electrical resistivity, which of the following pairs are correct:
| Material | Characteristic |
| 1. Iron | Conductor |
| 2. Manganin | Alloy |
| 3. Paper | Insulator |
Select the correct answer using the codes given below:
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3