Explanation

Acid rain reacts with minerals in stone structures, leading to their decay, which is termed "stone cancer."

It mainly affects limestone and marble, causing surface erosion and weakening of buildings and statues.

Explanation

Undersea earthquakes displace a large volume of water, generating powerful sea waves.

This sudden movement creates a tsunami, which can travel across oceans at high speeds.

Explanation

Smog is formed when pollutant gases like nitrogen oxides and hydrocarbons react in sunlight (photochemical reaction).

It creates a thick, hazy air harmful to health, especially in urban areas.

Explanation

Magnetic lines of force always form closed loops from the north pole to the south pole outside the magnet and continue inside the magnet.

They never start or end abruptly like electric field lines.

Explanation

Kilowatt-hour (kWh) is a unit of electrical energy.

It represents the energy consumed when 1 kilowatt of power is used for 1 hour.

Explanation

Vitamin B is found in:

• Vegetables (like leafy greens, bell peppers, and mushrooms)
• Whole wheat grains (like brown rice, quinoa, and whole-wheat bread)
• Fresh meat (like beef, chicken, and fish)

Vitamin B is a complex of several B vitamins, including:

• B1 (Thiamin)
• B2 (Riboflavin)
• B3 (Niacin)
• B5 (Pantothenic acid)
• B6 (Pyridoxine)
• B7 (Biotin)
• B9 (Folic acid)
• B12 (Cobalamin)

Explanation

Abdul Malik Aasmai (740 – 828 AD):

He was regarded as a specialist in animal sciences.

He wrote many books on animals and plants.

One of his books, “Al-Khei,l” is about horses.

A second, “Al-lbil” about camels.

A third “A-shat” about sheep.

A fourth “Al-Wahoosh” is about wild animals.

In the book “Khalaq-ul-Insan”, he described the different parts and functions of the human body.

Explanation

Robert Hooke, a 17th-century philosopher and scientist.

He was the first to use the word "cell" to describe a basic unit of life.

Explanation

According to Boyle's Law, at constant temperature, the volume of a gas is inversely proportional to its pressure.

So, doubling the pressure will halve the volume.

Explanation

Paracetamol (also known as acetaminophen) is a pain-relieving and fever-reducing drug.

It is classified as an analgesic.