Chemistry

Chemical Reactions and Processes

571 Questions

Chemical reactions and processes questions cover the transformation of substances through electrolysis, thermal decomposition, and catalysis. Key areas include identifying gas evolution, balancing chemical equations, and understanding industrial chemical applications. This general chemistry topic is a staple in the science sections of multiple competitive examinations.

Thermal decompositionElectrolysis processGas evolution reactionsHeterogeneous catalystsFuel cell components

Chemical Reactions and Processes Questions

Multiple choice

What is the effect of pH on the solubility of metal carbonates?

  1. Solubility increases with increasing pH.

  2. Solubility decreases with increasing pH.

  3. Solubility is independent of pH.

  4. Solubility varies randomly with pH.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For metal carbonates, the solubility decreases with increasing pH. This is because the carbonate ions (CO32-) react with hydrogen ions (H+) to form carbonic acid (H2CO3), which is a weak acid that dissociates into water and carbon dioxide (CO2).