Explanation

• Plastic is generally an amorphous (non-crystalline) material and does not naturally form crystals.
• Diamond is a crystalline form of carbon with a regular atomic structure.
• Sucrose (sugar) naturally forms crystals.
• Crystalline materials have atoms arranged in a regular repeating pattern.
• Amorphous materials lack a long-range ordered crystal structure.

Last verified on 27-07-2026

Explanation

• A Panacea means a universal remedy or a medicine believed to cure all diseases.
• The term comes from Greek mythology, where Panacea was the goddess of universal healing.
• In modern medicine, no real panacea exists for all diseases.
• A vaccine prevents specific diseases.
• An antibiotic treats bacterial infections.
• The term panacea is often used figuratively to describe a solution claimed to solve every problem.

Last verified on 27-07-2026

Explanation

Explanation

• Alluvium is the soil, sand, silt, clay, and gravel deposited by flowing rivers and streams.
• It forms fertile plains that are highly suitable for agriculture.
• The Indus Plain of Pakistan is largely made up of alluvial deposits.

Additional information:

• Alluvial fans are fan-shaped deposits formed where a river leaves a mountainous area.
• Albedo is the measure of how much sunlight a surface reflects and is unrelated to river deposits.

Last verified on 27-07-2026

Explanation

• Mushrooms are heterotrophs and cannot make their own food.
• They obtain nutrients by absorbing them from dead and decaying organic matter or from living organisms.
• Fungi lack chlorophyll, so they cannot perform photosynthesis.
• Fungi belong to the Kingdom Fungi.

Last verified on 27-07-2026

Explanation

• Viruses are non-cellular and obligate intracellular parasites.
• They cannot carry out life processes or reproduce without a living host cell.
• Viruses contain either DNA or RNA.
• They are considered to be at the boundary between living and non-living.
• The branch of science that studies viruses is called Virology.

Last verified on 27-07-2026

Explanation

• Geostationary satellites are located directly above the equator. 
• Altitude: About 35,786 kilometers (22,236 miles) above sea level.
• Speed and Direction: Moves from west to east, matching the Earth's rotation speed.
• Time Period: Exactly 24 hours (one rotation day). 

Last updated 26-07-2026 by NA

Explanation

• Wilhelm Conrad Rontgen discovered X-rays
• He was discovered on 8 November 1895.
• He got the Nobel Prize in Physics in 1901.

Additional questions

• The penetrating power of X-rays depends on their frequency

Last updated 26-07-2026 by NA

Explanation

• The atomic number of hydrogen is 1.
• It is the first element on the periodic table. 
• Named by: Antoine Lavoisier (1783)
• Atomic mass: 1.00784 u
• Appearance: Colorless gas
• Symbol: H
• Protons: 1
• Electrons: 1

Last updated 26-07-2026 by NA

Explanation

• A vegan avoids animal products, including meat, dairy, eggs, and often other animal-derived products.

Additional information 

• Vegetarian: Does not eat meat, but may eat dairy and eggs.
• Carnivore: Eats only meat.
• Omnivore: Eats both plants and meat. 

Last updated 26-07-2026 by NA