Explanation

Magnetic property: Thorium is a ferromagnetic metal, meaning it is capable of being magnetized.

Radioactive property: Thorium is also a radioactive metal, emitting alpha, beta, and gamma radiation due to its unstable atomic nucleus.

Explanation

Rusting of iron is a chemical reaction where iron reacts with oxygen and water to form iron oxide (rust).

Unlike physical changes like melting or bending, rusting involves a chemical transformation.

Explanation

The key element required for solar energy conversion in most solar cells is silicon

It is the most common semiconductor material: Silicon is used in about 95% of solar cells sold today. 

It is a naturally occurring element: Silicon is the second most abundant element on Earth, after oxygen.

Explanation

Cadmium is not a radioactive element.

It is a metal used in batteries and coatings.

Whereas Uranium and Plutonium are radioactive.

They used as nuclear fuels.

Explanation

Iron is galvanized by coating it with zinc.

It prevents rusting and corrosion by acting as a protective barrier.

Explanation

Biogas is produced under anaerobic conditions; the process is denominated as anaerobic digestion.

The major constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia.

Explanation

The periodic table, also known as the periodic table of elements, is an organized arrangement of chemical elements into rows (periods) and columns (groups).

The periodic table shows trends in element properties, such as:

• Metallic character: Increases down a group and from right to left across a period.
• Nonmetallic character: Increases from the bottom left to the top right of the table.

Explanation

Hydrogenation is the process by which hydrogen is used in the preparation of banaspati ghee from vegetable oil

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ND16-12-2022

Explanation

Sulfur and nitrogen compounds in the atmosphere can combine with water and oxygen to form sulfuric acid and nitric acid, leading to acid rain.

Acid rain is a type of precipitation that contains high levels of sulfuric and nitric acid, which can harm the environment, infrastructure, and human health.

Explanation

While creep is a slow and gradual process, it's still not recommended to try to outrun any mass wasting phenomenon.

Creep can still be unpredictable and may accelerate suddenly, making it dangerous to be in the area.