Q: One kilobyte is equal to:

A: 1024 bytes

B: 2048 bytes

C: 1023 bytes

D: 10000 bytes



Correct Option: A  [ 1024 bytes ]

Remark:

Explanation: One kilobyte (KB) is equal to 1024 bytes. This is because computer memory is based on the binary system (powers of 2), and 1024 = 2¹⁰. Hence, 1 KB = 1024 bytes, not 1000 bytes as in the decimal


Q: What is the full form of LAN?

A: Line Area Network

B: Linear Area Network

C: Local Area Network

D: Land Area Network



Correct Option: C  [ Local Area Network ]

Remark:

The full form of LAN is Local Area Network. It is a network that connects computers and devices within a limited geographical area such as a home, office, school, or building. LANs enable data sharing, resource sharing (like printers or internet connections), and communication between connected devices. Common technologies used in LANs include Ethernet and Wi-Fi.

Other options (for context)

  • Line Area Network: Incorrect — not a recognized networking term.
  • Linear Area Network: Incorrect — there is no such standard network type.
  • Land Area Network: Incorrect — misinterpretation of LAN abbreviation.


Q: Which of the following is the best conductor of heat ?

A: mercury

B: silver

C: leather

D: benzene



Correct Option: B  [ silver ]

Remark:

Silver is the best conductor of heat among the given options. It efficiently transfers heat due to the presence of free electrons that move easily within its metallic structure. Because of this property, silver is used in high-quality thermal equipment and electrical contacts.

  • Mercury: A metal but conducts heat less effectively than silver.
  • Leather and Benzene: Poor conductors of heat (insulators).


Q: The largest artery in human body is:

A: Aorta

B: Capillary

C: Vena cava

D: Pulmonary vein



Correct Option: A  [ Aorta ]

Remark:

The aorta is the largest artery in the human body. It originates from the left ventricle of the heart and distributes oxygenated blood to all parts of the body through its various branches. The aorta has thick, elastic walls that can withstand the high pressure of blood pumped directly from the heart. It is divided into parts such as the ascending aorta, aortic arch, and descending aorta.

Other options (for context)

  • Capillary: The smallest blood vessels where exchange of gases and nutrients occurs.
  • Vena cava: The largest vein, not an artery; it carries deoxygenated blood back to the heart.
  • Pulmonary vein: Carries oxygenated blood from the lungs to the heart but is not the largest vessel.


Q: Which of the following is not a biofertilizer ?

A: Rhizobium

B: Mucor

C: Azotobacter

D: Anabaena



Correct Option: B  [ Mucor ]

Remark:

Explanation: Mucor is not a biofertilizer; it is a saprophytic fungus that grows on decaying organic matter. Biofertilizers are living microorganisms that enhance soil fertility by fixing atmospheric nitrogen or solubilizing nutrients. Examples include Rhizobium, Azotobacter, and Anabaena.


Q: Norman E. Borlaug is associated with

A: Green Revolution

B: White Revolution

C: Pink Revolution

D: Blue Revolution



Correct Option: A  [ Green Revolution ]

Remark:
Norman E. Borlaug was awarded the Nobel Peace Prize in 1970 in recognition of his contributions to global food production.


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: What makes a lemon sour?

A: Tartaric acid

B: Oxalic acid

C: Citric acid

D: Hydrochloric acid



Correct Option: C  [ Citric acid ]

Remark:

Explanation: The sour taste of a lemon is due to the presence of citric acid. Citric acid is a weak organic acid found naturally in citrus fruits such as lemons, oranges, and limes. It gives them their characteristic tangy flavor and also acts as a natural preservative.


Q: The intensity of earthquake is measured by :

A: Barometer

B: Hydrometer

C: Polygraph

D: Seismograph



Correct Option: D  [ Seismograph ]

Remark:

Explanation: The intensity and magnitude of an earthquake are measured using a scientific instrument called a seismograph. It records the vibrations or seismic waves produced by earthquakes. The data obtained from a seismograph are used to calculate the earthquake’s strength on scales such as the Richter Scale or the Moment Magnitude Scale. The seismogram (the recorded graph) shows the amplitude and duration of the waves, helping scientists locate the earthquake’s epicenter and determine its severity.


Q: The sex of a newborn baby is determined by the chromosome inherited from :

A: the mother

B: mother's mother

C: the father

D: father's father



Correct Option: C  [ the father ]

Remark:

Explanation: The sex of a newborn baby is determined by the chromosome inherited from the father. Humans have 23 pairs of chromosomes — 22 pairs of autosomes and one pair of sex chromosomes. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY). The mother always contributes an X chromosome, but the father can contribute either an X or a Y. If the sperm carrying an X chromosome fertilizes the ovum, the child will be a girl (XX); if the sperm carries a Y chromosome, the child will be a boy (XY).

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