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The correct option is (d) NaHCO₃. Sodium bicarbonate is a mild, non-corrosive base commonly used in baking soda. It is safe, weakly alkaline, and does not harm or corrode, unlike strong bases such as sodium hydroxide or calcium hydroxide.
Class 10 Science Sample Paper for half yearly Exam 2025-26
Half Yearly Exam Sample Paper 2025-26
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