Question

What type of chemical reaction does the reaction belong to?

Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.

• A. Synthesis reaction
• B. Precipitation reaction
• C. Decomposition reaction
• D. Redox reaction

Answer 1

Answer: (D)

Hydrogen sulphide ($H_{2}S$) reacts with oxygen ($O_2$) to form solid sulphur ($S$) and water($H_{2}O$). It is a redox reaction as both oxidation of hydrogen sulphide to sulphur and reduction of oxygen to water takes place. The equation can be written as:
$2H_{2}S+O_2\to 2S+2H_{2}O$