General MCQs
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Q281.Amnesia is related to:____?
Correct Answer: D
Amnesia refers to a partial or total loss of memory.
Q282.An abnormally great desire for food, excessive eating is called?
Correct Answer: B
Bulimia nervosa is an eating disorder characterized by episodes of binge eating and an abnormally strong urge to eat.
Q283.An astronaut inside a spacecraft is in a state of weightlessness. This implies that?
Correct Answer: D
Weightlessness in a spacecraft occurs because both the astronaut and spacecraft are in continuous free-fall around Earth, not because gravity is absent.
Q284.An astronaut sees the colour of the sky as: ____?
Correct Answer: D
Astronauts in space see the sky as black because there's no atmosphere to scatter sunlight, unlike on Earth.
Q285.An Average Hummingbird’s heart rate per minute is ____.
Correct Answer: D
A hummingbird's heart can beat more than 1,200 times per minute, among the fastest of any animal.
Q286.An edible underground stem is?
Correct Answer: A
Ginger is an edible underground stem (rhizome), not a root as commonly assumed.
Q287.An egg sinks in soft water but floats in a concentrated solution of salt because?
Correct Answer: C
An egg sinks in fresh water but floats in a concentrated salt solution because the salt solution's density exceeds that of the egg.
Q288.An example of an abiotic component ____?
Correct Answer: B
Soil is an example of an abiotic (non-living) component of an ecosystem.
Q289.An example of rhizome is____?
Correct Answer: C
Ginger is a classic example of a rhizome — a horizontal underground stem.
Q290.An extremely small piece of silicon on which integrated circuits are implicated is called ____?
Correct Answer: D
A tiny piece of silicon on which integrated circuits are built is called a chip (microchip).
Q291.An iceberg is floating in sea. How much of its mass will remain above the surface of water?
Correct Answer: A
Since ice is about 90% as dense as seawater, roughly one-tenth of an iceberg's mass remains visible above the water surface.
Q292.An important ore of chromium is ?
Correct Answer: B
Chromite is the principal ore from which chromium is extracted.
Q293.An instrument to detect the purity of milk is____?
Correct Answer: A
A lactometer is an instrument used to check the purity (density) of milk.
Q294.An optical instrument which is used measure the properties of visible light is called?
Correct Answer: C
A spectroscope is an optical instrument used to analyze and measure the properties of visible light by splitting it into its spectrum.
Q295.An ordinary mobile phone communicate by using____?
Correct Answer: D
Ordinary mobile phones communicate using radio waves to transmit and receive signals via cell towers.
Q296.Angle of friction and angle of repose are?
Correct Answer: A
The angle of friction and the angle of repose are numerically equal, both representing the slope angle at which sliding just begins.
Q297.Animal which captures and readily kills living animals for its food is called____?
Correct Answer: C
A predator is an animal that hunts, captures, and kills other living animals for food.
Q298.Animal with the sharpest hearing ability?
Correct Answer: B
The greater wax moth has the most sensitive hearing of any known animal, able to detect ultrasonic frequencies far beyond human range.
Q299.Animals living in the Tree trunks are known as____?
Correct Answer: A
Animals that live in trees are called arboreal animals.
Q300.Animals use nitrogen in the form of____?
Correct Answer: C
Animals obtain usable nitrogen mainly in the form of nitrites/nitrates absorbed through the food chain, ultimately derived from plants.