Q. The substance which when added in a small proportion into petrol reduces knocking is (Solved)
1. iso-butane
2. n-heptane
3. methyl nepthalene
4. tetra ethyl lead
5. None of the above
- d. tetra ethyl lead
1. iso-butane
2. n-heptane
3. methyl nepthalene
4. tetra ethyl lead
5. None of the above