Everyday Science — All MCQs
2717 questions available
Q781.An element that does not occur in nature but can be produced artificially is____?
Correct Answer: A
Plutonium does not occur naturally in significant amounts and is mainly produced artificially in nuclear reactors.
Q782.An example of an abiotic component ____?
Correct Answer: B
Soil is an example of an abiotic (non-living) component of an ecosystem.
Q783.An example of rhizome is____?
Correct Answer: C
Ginger is a classic example of a rhizome — a horizontal underground stem.
Q784.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).
Q785.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.
Q786.An important ore of chromium is ?
Correct Answer: B
Chromite is the principal ore from which chromium is extracted.
Q787.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.
Q788.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.
Q789.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.
Q790.Analytical solutions to Quadratic equations were introduced by____?
Correct Answer: A
The 9th-century mathematician Al-Khwarizmi is credited with introducing systematic analytical (algebraic) solutions to quadratic equations.
Q791.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.
Q792.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.
Q793.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.
Q794.Animal without red blood cells is____ ?
Correct Answer: B
The earthworm lacks red blood cells; its blood instead uses hemoglobin dissolved directly in the plasma.
Q795.Animals living in the Tree trunks are known as____?
Correct Answer: A
Animals that live in trees are called arboreal animals.
Q796.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.
Q797.Another name for our voice box is ____?
Correct Answer: A
The larynx, located in the throat, is commonly known as the voice box.
Q798.Another name of RDX is ____?
Correct Answer: D
RDX (Research Department Explosive) is also known as cyclonite, a powerful military explosive.
Q799.Another name of vitamin C is____?
Correct Answer: A
Vitamin C is also known by its chemical name, ascorbic acid.
Q800.Anti Diuretic hormone (ADH) also known as Vasopressin, Arginine Vasopressin and agripressin. Is secreted by____ ?
Correct Answer: A
Anti-Diuretic Hormone (ADH), also called vasopressin, is secreted by the pituitary gland (specifically the posterior pituitary).