Caustic soda, or sodium hydroxide, is an extremely strong chemical that will dissolve most blockages clogging up your sink.  Caustic soda can be purchased at most hardware stores. Dilute 3 cups (750 ml) of caustic soda with 3/4 gallon (3 L) of cold water in a large mop bucket. Mix the chemical and the water together with a wooden spoon. Do not use any container or utensil you plan to use for food later on. Do not stir the water and caustic soda together with your hands. The water and caustic soda should begin to "fizz" and heat up as you mix the two together. Carefully pour the solution directly into the clogged sink drain. Let sit for 20 to 30 minutes without touching it. Boil 1 gallon (4 L) of water on the stove and use it to flush the drain. Repeat the procedure if necessary. If you are connected to a public sewer system and not to a well or septic tank, you can use bleach to both clean and deodorize a clogged sink.  Pour 1 cup (250 ml) of undiluted bleach directly down the sink drain. Let sit for 5 to 10 minutes. Turn your sink on and let water rush into the drain. Make sure that the water is as hot as possible and as strong or rapid as possible. Let it run up to 5 minutes. If your sink begins to back up and fill with water, turn the water off and let it drain before attempting to unclog the sink again. Do not use bleach if you use a septic tank. Bleach kills bacteria living in the tank, but the bacteria it kills eats solid waste, thereby preventing the lines from clogging. Commercial drain cleaners can be purchased at most grocery stores, and there are caustic, acid, and enzymatic cleaners available.  Read the label carefully to determine which cleaner is right for your particular type of blockage. For instance, some cleaners might work better in bathroom sinks, while others might work better for kitchen sinks. Follow the instructions on the label carefully when you use it. Caustic drain cleaners rely on chemical reactions caused by hydroxide ions. Acid drain cleaners use a chemical reaction between...

How would you rephrase that briefly using Hindi?
नाली में कॉस्टिक सोडा डाल दें: ब्लीच का इस्तेमाल करें: ड्रेन क्लीनर का प्रयोग करें: