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.


Q: Which one of the following gases, present in the air near the surface of the Earth, has maximum concentrations?

A: Oxygen

B: Hydrogen

C: Nitrogen

D: Methane



Correct Option: C  [ Nitrogen ]

Remark:


Q: dolomite is used in which field?

A: Soil conditioner

B: Pasteurization

C: Dynamite

D: Synthetic rubber



Correct Option: A  [ Soil conditioner ]

Remark:


Q: 'Beans' is associated with computer programming language :

A: C++

B: Java

C: COBOL

D: PASCAL



Correct Option: B  [ Java ]

Remark:

Explanation: In computer programming, the term "Beans" is specifically associated with the Java programming language. A JavaBean is a reusable software component written in Java that can be manipulated visually in a builder tool. JavaBeans follow certain conventions such as having a no-argument constructor, providing getter and setter methods, and being serializable. They are widely used in Enterprise Java applications for data encapsulation and to promote modular, reusable code.


Q: If we add salt to pure water, its boiling point will

A: increase

B: decrease

C: remains same

D: None of the above



Correct Option: A  [ increase ]

Remark:

Explanation: When salt is added to pure water, its boiling point increases. This phenomenon is known as boiling point elevation, a colligative property. The presence of dissolved salt particles reduces the vapor pressure of water, requiring a higher temperature for it to boil.


Q: The amount of light entering into eye can be controlled and regulated by ___________ .

A: Sclera

B: cornea

C: pupil

D: retina



Correct Option: C  [ pupil ]

Remark:

Explanation: The pupil is the central opening in the iris that regulates the entry of light into the eye. In bright light, the iris contracts, making the pupil smaller (a process called constriction), while in dim light, it enlarges (known as dilation). This automatic adjustment, known as the pupillary reflex, helps protect the retina from excessive light and ensures clear vision in varying light condit


Q: Heavy water is :

A: Ice

B: Water at 4 degree Celsius

C: Deuterium oxide

D: Solution of sugar and water



Correct Option: C  [ Deuterium oxide ]

Remark:

Explanation: Heavy water is chemically known as Deuterium oxide (D₂O). It is similar to ordinary water (H₂O), but the hydrogen atoms are replaced by deuterium — a heavier isotope of hydrogen containing one proton and one neutron. Heavy water is not suitable for drinking but is used as a moderator and coolant in nuclear reactors because it slows down neutrons, allowing a controlled nuclear fission reaction. It is also used in scientific research and isotope studies.


Q: In which part of the human body carpal bones are found ?

A: Wrist

B: Femur

C: Neck

D: None of these



Correct Option: A  [ Wrist ]

Remark:

Explanation: Carpal bones are the eight small bones that make up the wrist (also known as the carpus) in the human skeletal system. These bones are arranged in two rows — a proximal row (closer to the forearm) and a distal row (closer to the hand). They connect the bones of the forearm (radius and ulna) to the bones of the hand (metacarpals) and allow for the flexibility and movement of the wrist. The carpals are essential for various hand motions like bending, rotation, and gripping.


Q: Which one of the following has the highest fuel value ?

A: Hydrogen

B: Charcoal

C: Natural gas

D: Gasoline



Correct Option: A  [ Hydrogen ]

Remark:
"Hydrogen" has the highest calorific value among commonly used fuels because it has a very high energy content, undergoes complete combustion, has a high heat of combustion, and can be used in various applications.


Q: Purity of milk is tested by:

A: Electrometer

B: Lactometer

C: Radiometer

D: Refractometer



Correct Option: B  [ Lactometer ]

Remark:

The purity of milk is tested using a Lactometer. It works on the principle of Archimedes’ principle and is used to measure the specific gravity (density) of milk. Pure milk has a specific gravity ranging between 1.026 and 1.032. If water or other substances are added, the density decreases, indicating adulteration. The lactometer thus helps determine whether the milk is pure or diluted.

Other options (for context)

  • Electrometer: Measures electric potential or charge, not related to milk testing.
  • Radiometer: Measures radiant energy or light intensity.
  • Refractometer: Used to measure refractive index, commonly for sugar solutions, not milk purity.
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