MCQ
Which one of the following elements show high negative electrode potential?
- ACopper
- BManganese
- CCobalt
- ✓Zinc
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| Column-I | Column-II |
| A. Anionic detergent | 1. Potassium salt of higher fatty acid. |
| B. Catonic detergent | 2. Penta erythirityl stearate |
| C. Soap | 3. Sodium lauryl sulphate |
| D. Non ionic detergent | 4. n-hexa deccytiri methyl ammonium chloride |
