Everyday Science 2131 MCQs [All-Courses]

A substance that acts as both an acid and a base is called an amphoteric substance.
Example: Water (H₂O) can act as both an acid and a base.

1. The main cause of biodiversity loss is habitat destruction.

2. Deforestation, pollution, and climate change also reduce biodiversity.

3. Human activities are the major reason behind the extinction of many species.

1. Fission is related to the process of splitting an atomic nucleus.

2. It occurs in nuclear reactions to release a large amount of energy.

3. Nuclear power plants use nuclear fission to produce electricity.

1. The smallpox vaccine was discovered by Edward Jenner in 1796.

2. He is known as the “Father of Vaccination.”

3. He used cowpox material to protect people from smallpox.

1. Penicillin was first discovered by Alexander Fleming in 1928.

   He discovered it accidentally from a mold called Penicillium.

2. Penicillin became the world’s first widely used antibiotic.

Agricultural land is converted into desert due to desertification.
It happens because of deforestation, overgrazing, excessive farming, and shortage of water.
These factors make the soil dry and infertile, turning fertile land into desert land.

• The egg has the highest protein content among the listed options.
• It is considered a "complete protein" source because it contains all nine essential amino acids required by the human body.
• On average, one large egg provides approximately 6–7 grams of protein, which is about 12.6–13 grams of protein per 100 grams

Hydrochloric acid is the digestive fluid formed by the stomach during the process of digestion.