Correct option is D
Correct Answer: (d) Both the statements are false.
Explanation:
- Statement - I: The chemical formula given, CaSO₄·½H₂O, is incorrect for baking soda. This formula represents Plaster of Paris, not baking soda. The correct formula for baking soda is NaHCO₃ (Sodium Bicarbonate). Hence, this statement is false.
- Statement - II: Baking soda is not primarily used for making toys, decorative materials, or smoothing surfaces. Its primary uses include cooking (as a leavening agent), cleaning, and medical applications (e.g., relieving acidity). The uses described in the statement do not align with baking soda's primary applications. Hence, this statement is also false.