Question

Which gas is released during the preparation of bread is

• A. Nitrogen
• B. Oxygen
• C. Carbon dioxide
• D. Hydrogen

Answer 1

The correct option is C

Carbon dioxide

The explanation for the correct answer

(C) Carbon dioxide

Fermentation

• Fermentation is an anaerobic chemical reaction that breaks down molecules like glucose.
• Alcohol fermentation, lactic acid fermentation, and acetic acid fermentation are the three main kinds of fermentation.
• Fermentation is a process that cannot be reversed.
• With the help of bacteria, milk is transformed into curd.

Preparation of bread

• When the bread is baked, ${\mathrm{CO}}_2$ (carbon dioxide) is released.
• During fermentation, yeast cells release a lot of carbon dioxide, which causes the pores in the bread to form.
• Yeast enzymes can break down the starch in flour into sugars, transforming starch to maltose with amylase and subsequently maltose to glucose with maltase.

The explanation for the incorrect answer

(A) Nitrogen

• Cryogenic steam distillation of liquid air, adsorption extraction of gaseous air, or membrane diffusion are all approaches for synthesizing industrial nitrogen gas.
• Systems for the production of nitrogen gas.

(B) Oxygen

• Oxygen is a highly reactive non-metal that acts as an oxidizer, forming oxides with a wide range of elements and compounds.
• Photosynthesis in the Earth's atmosphere, which uses sunlight to produce oxygen from water and carbon dioxide, replenishes it.

(D) Hydrogen

• Hydrogen gas is currently created from natural gas, naphtha, heavy oil, water, and coal, among other basic fossil fuels.

Therefore, the correct option is (C) Carbon dioxide