Test: Test Yourself - Class 8 MCQ

Rayon is a semi-synthetic fiber that is extensively used in the textile industry for making fabrics. It is derived from natural cellulose, often sourced from wood pulp. Rayon is valued for its softness, drape, and similarity to natural fibers like cotton, making it a popular choice in various clothing and textile applications.

Synthetic fibers are artificial or manmade fibers that are created through chemical processes. Unlike natural fibers like cotton, wool, and silk, which are obtained from plants and animals, synthetic fibers are produced using various synthetic materials such as polyester, nylon, acrylic, and others.

Nylon fibers are commonly used in the production of ropes due to their strength, durability, and resistance to abrasion. Nylon ropes find applications in various industries, including marine, construction, and sports, where strong and reliable ropes are required.

The atomic number of Gold is 79. This means an atom of gold contains 79 protons in its nucleus, which uniquely identifies it as gold on the periodic table.

The boiling point of Gold is approximately 1064 degrees Celsius (1947 degrees Fahrenheit).

Asia is the continent that produces the highest amount of Tin, with countries like China, Indonesia, and Myanmar being major producers.

International E-Waste Day (IEWD) is celebrated annually on October 14 to raise awareness about the proper management and disposal of electronic waste.

India's textile exports declined during the 19th century due to various factors, including the British industrialization and competition with cheap machine-made textiles from Britain.

Historically, both cotton and silk had a large market in Europe, where they were highly valued for their quality and versatility.

James Mill, the Scottish historian, was born on 6 April 1773 in the United Kingdom.

In his work 'A History of British India,' James Mill divided Indian history into three periods based on the dominant ruling powers: Hindu, Muslim, and British.

A Kaleidoscope is a cylindrical optical instrument with mirrors that creates beautiful and symmetrical patterns when you look through it and rotate it. It works based on the reflection of light within the mirrors.

Generally, the voice of a man has a lower frequency (or pitch) when compared to the voice of a woman or a baby girl/boy. This is why male voices are often perceived as deeper.

Raindrops fall downward on Earth due to the force of gravity, which pulls all objects towards the center of the Earth.

When a ball is thrown upwards, it comes back to the Earth due to the force of gravity. Gravity is the attractive force between objects with mass, pulling the ball back towards the Earth's surface.

After the Indian Rebellion of 1857, also known as the Indian Mutiny or Sepoy Mutiny, the British Crown took direct control over the Indian administration, ending the rule of the East India Company.

Bahadur Shah Zafar was the last Mughal emperor of India. He ruled during the Indian Rebellion of 1857 and his reign marked the end of the Mughal dynasty's direct rule.

CNG stands for Compressed Natural Gas, which is a cleaner alternative to gasoline and diesel for vehicles.

Iron is an essential metal used in the manufacturing of machinery, tools, vehicles, construction materials, and many other industrial applications.

The atomic number of an element corresponds to the number of protons in its nucleus. For Calcium, the atomic number is 20, which means it has 20 protons.