Can I sue neighbor for making a slope on my terrace so that the water in rainy season falls in my house as there is double pressure from both side?

Under Indiana law, you can make a claim against your neighbor if your neighbor has funneled or channeled water in such a way as to increase the run-off onto your property and that has caused damage. I suggest you discuss the situation with your neighbor first and ask him or her to fix the problem. If that does not work, you should contact a lawyer in your area that is familiar with riparian rights (water law).