Q: Who invented Dynamite?

A: J B Dunlop

B: Alfred Nobel

C: James Simons

D: Peter Hargreaves



Correct Option: B  [ Alfred Nobel ]

Remark:

Dynamite was invented by Alfred Nobel in 1867. He was a Swedish chemist, engineer, and industrialist who discovered that nitroglycerin could be stabilized by mixing it with an absorbent material like diatomaceous earth, making it safer to handle and transport. This invention revolutionized the mining and construction industries. In his later years, Alfred Nobel established the Nobel Prizes using the wealth he accumulated from his inventions.

Other options (for context)

  • J. B. Dunlop: Invented the pneumatic rubber tyre.
  • James Simons: A mathematician and hedge fund manager, not an inventor.
  • Peter Hargreaves: Not related to any major scientific invention; possibly confused with James Hargreaves, who invented the Spinning Jenny.


Q: A rocket functions on which of the following laws ?

A: Newtons first law

B: Newtons second law

C: Newtons third law

D: All of the above



Correct Option: C  [ Newtons third law ]

Remark:

A rocket functions based on Newton’s Third Law of Motion, which states that “for every action, there is an equal and opposite reaction.” The rocket expels gases downward at high speed (action), and in response, the rocket is propelled upward (reaction). This principle enables space rockets to move even in the vacuum of space where no air resistance exists.

  • Newton’s First Law: Deals with inertia, not propulsion.
  • Newton’s Second Law: Explains force and acceleration but doesn’t directly describe rocket thrust.


Q: Red blood corpuscles are formed in:

A: Heart

B: Bone marrow

C: Liver

D: Kidney



Correct Option: B  [ Bone marrow ]

Remark:

Red Blood Corpuscles (RBCs), also known as erythrocytes, are formed in the bone marrow. Specifically, they are produced in the red bone marrow of large bones through a process called erythropoiesis. The hormone erythropoietin, secreted mainly by the kidneys, regulates this process. Mature RBCs are responsible for transporting oxygen from the lungs to body tissues using the pigment hemoglobin.

Other options (for context)

  • Heart: Pumps blood but does not produce blood cells.
  • Liver: In adults, it does not form RBCs (though it does in the fetal stage).
  • Kidney: Produces erythropoietin hormone but not RBCs directly.


Q: Fathom is unit of:

A: Depth

B: Distance

C: Frequency

D: Sound



Correct Option: A  [ Depth ]

Remark:

Explanation: Fathom is a unit used to measure depth, particularly the depth of water in oceans and seas. One fathom is equal to 6 feet or approximately 1.83 meters. It is commonly used in navigation and marine studies.


Q: Which layer of the atmosphere is nearest to the surface of the earth?

A: Mesosphere

B: Thermosphere

C: Troposphere

D: Stratosphere



Correct Option: C  [ Troposphere ]

Remark:

Explanation: The troposphere is the lowest layer of the Earth's atmosphere and is closest to the Earth's surface. It extends up to about 8–15 km from the surface, depending on latitude and season. This layer contains about 75% of the total atmospheric mass and almost all the water vapor and weather phenomena such as clouds, rain, and storms occur here. The temperature decreases with increasing altitude in this layer. The boundary between the troposphere and the stratosphere is known as the tropopause.


Q: Light Year is a unit of

A: Time

B: Distance

C: Brightness

D: none of these



Correct Option: B  [ Distance ]

Remark:
A unit of Astronomical distance equivalent to the distance that light travels in one year,


Q: 'Mesothelioma' is caused by toxicity of

A: Arsenic

B: Lead

C: Mercury

D: Asbestos



Correct Option: D  [ Asbestos ]

Remark:

Explanation: Asbestos is a group of naturally occurring fibrous silicate minerals once widely used in construction and insulation. When inhaled, asbestos fibers accumulate in the lungs and pleura, leading to inflammation and scarring over years. This chronic exposure can cause asbestosis (lung fibrosis) and mesothelioma — a deadly cancer of the membrane lining the lungs (pleura) or abdomen (peritoneum).


Q: Lens is made up of:

A: pyrex glass

B: flint glass

C: ordinary glass

D: cobalt glass



Correct Option: B  [ flint glass ]

Remark:

Explanation: A lens is generally made of flint glass, which contains lead oxide. Flint glass has a higher refractive index than ordinary glass, allowing it to bend light more effectively. This property makes it ideal for manufacturing optical instruments such as lenses and prisms.


Q: Entomology is the science that studies:

A: The origin and history of technical and scientific terms.

B: Insects

C: The formation of Rocks

D: Behavoiur of human beings



Correct Option: B  [ Insects ]

Remark:

Explanation: Entomology is a branch of Zoology that focuses on the study of insects, including their structure, classification, behavior, ecology, and evolution. Insects make up more than 75% of all known animal species on Earth and play crucial roles in pollination, decomposition, and food chains. Scientists who study insects are known as entomologists.


Q: When was Edusat launched ?

A: October, 1988

B: June, 2001

C: September, 2004

D: March 2008



Correct Option: C  [ September, 2004 ]

Remark:

Explanation: EDUSAT (Education Satellite) was launched by the Indian Space Research Organisation (ISRO) in September 2004. It was the first Indian satellite built exclusively for educational purposes, designed to provide distance learning and interactive education through satellite communication.

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