most difficult question for class 7 ch 3 history ncert.
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Washing soda features either as an ingredient in some cleaning products or as a standalone cleaning agent. It can be made by putting baking soda in an oven and is often used in homemade detergent recipes, and is sometimes used as a laundry booster or water softener. It’s an alkaline substance that can be used for general household cleaning, and even for the laundry. However, it doesn’t clean clothes perfectly, so using laundry detergents is always recommended for the best results. Read on to learn all about washing soda, what it is and how it’s made, and how you can use it for your laundry.
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