Sulfuric acid will react with which of the following to form sulfur dioxide gas Select one: a. Sodium sulfite b. Thioacetamide c. Sodium sulfate d. Oxygen Clear my choice

Sodium sulfite (Na2SO3)

Explanation:

Sulfuric acid is able to displace volatile acids from their corresponding salts and the acids displaced are unstable and they break down to give volatile products

For example, in to reaction of sulfuric acid and sodium sulfite; two processes occur

1. Sulfuric acid forms sodium sulfate and sulfurous acid

Na2SO3(s) + H2SO4(aq) > Na2SO4(aq) + H2SO3

2. The H2SO3 is unstable thereby decompose spontaneously to water and sulfur dioxide gas.

H2SO3 > H2O(l) + SO2(g)

Final reaction gives;

Na2SO3(s) + H2SO4 (aq) > Na2SO4(aq) + H2O(l) + SO2(g)

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."