Baking soda is
1). Potassium carbonate
2). Sodium hydroxide
3). Sodium carbonate
4). Sodium bicarbonate
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1. Hydrochloric acid is also known as
2. The electronic configuration of an atom having atomic number 20 is
3. Water attains maximum density at-
4. The depletion in Ozone layer is caused by .
7. Which of the following elements is not present in stainless steel?
8. The mineral containing both magnesium and calcium is
9. Which one of the following contributes largely to the greenhouse effect
10. Which of the following is used as a lubricant in heavy machines?