JAMB Chemistry 2011 Objective — Question 37

Question 37 of 49 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2011 Objective paper, with the correct answer and a full explanation.

The constituent of baking powder that makes the dough to rise is

A. A. NaCl
B. B. NaHCO3Correct
C. C. NaOH
D. D. Na2CO3

Explanation

The constituent that makes dough rise is NaHCO3. The rising is due to CO2 gas filling the spaces within the flour, released upon decomposition: 2NaHCO3 → Na2CO3+H2O+CO2.

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