Yes, Sujan is likely to remove the grease from his shirt when he washes it with petrol. The scientific reason behind this is that grease is a nonpolar substance, and petrol is also nonpolar. Nonpolar substances are attracted to each other, so the grease on the shirt will be dissolved in the petrol, allowing it to be washed away. Soap and water, on the other hand, are polar substances, which are less effective at dissolving grease. Therefore, using petrol is a more efficient method for removing grease stains from clothing. However, it's important to exercise caution when using petrol due to its flammable nature.