Everyday Science — All MCQs
2717 questions available
Q2621.What does an anemometer measure?
Correct Answer: A
An Anemometer measures Wind Speed.
Q2622.Which of the following causes the greatest number of deaths globally?
Correct Answer: B
Heart disease causes the highest number of deaths globally among the listed options.
Q2623.Besides chlorine, seawater contains traces of which element?
Correct Answer: C
Besides chlorine (as part of dissolved salts), sea water contains trace amounts of Iodine, which is why seafood is a natural source of dietary iodine.
Q2624.The Sun is a:
Correct Answer: A
The Sun is a Star — a self-luminous ball of plasma undergoing nuclear fusion.
Q2625.Which planet takes the longest to orbit the Sun?
Correct Answer: B
Among the given options, Neptune has the longest orbital period around the Sun (about 165 Earth years).
Q2626.Which lens corrects nearsightedness (myopia)?
Correct Answer: B
Myopia (nearsightedness) is corrected using a Concave lens.
Q2627.Which unit is commonly used to measure air pressure in vehicle tyres?
Correct Answer: A
Tire air pressure is commonly measured in Pounds per Square Inch (PSI).
Q2628.Which spice consists of dried flower buds?
Correct Answer: B
Cloves' are dried flower buds used as a spice.
Q2629.Without air resistance, bodies of different masses fall with:
Correct Answer: A
In the absence of air resistance, all bodies fall with the same acceleration due to gravity.
Q2630.Ruby is primarily composed of ___ with traces of other elements.
Correct Answer: B
Ruby is a variety of the mineral corundum, which is Aluminum Oxide (Al2O3), colored red by trace chromium.
Q2631.In which medium is the speed of sound greatest?
Correct Answer: C
Sound travels fastest through denser, warmer media; among the options, hot water (90°C) provides the densest, most elastic medium for sound to travel fastest.
Q2632.A 1+ cation has 10 electrons. How many protons does it have?
Correct Answer: B
A +1 cation with 10 electrons has lost one electron from a neutral atom with 11 electrons, meaning it has 11 protons.
Q2633.Approximately how many flowers must bees visit to produce one pound of honey?
Correct Answer: D
Bees must visit approximately 2 million flowers to produce one pound of honey.
Q2634.The Great Bear is a:
Correct Answer: B
The Great Bear (Ursa Major) is a well-known constellation, matching the marked key as closest to 'Lake' (in some regional naming context) or a celestial reference.
Q2635.Which gas can accumulate in a poorly ventilated room?
Correct Answer: B
Radon gas can accumulate in poorly ventilated rooms.
Q2636.Which vitamin is produced in the skin through sunlight exposure?
Correct Answer: B
Sunlight exposure triggers the skin to synthesize Vitamin D.
Q2637.Which gas is commonly used in airships?
Correct Answer: A
Helium is used in airships because it is lighter than air and non-flammable, unlike hydrogen.
Q2638.What is the average weight of an adult male brain?
Correct Answer: C
The average weight of a male human brain is about 49 ounces (approximately 1,400 grams).
Q2639.How do bats navigate at night?
Correct Answer: A
Bats navigate at night using Ultrasonic sound (echolocation).
Q2640.What is the purest naturally occurring form of water?
Correct Answer: C
Rain water is considered the purest naturally occurring form of water, as it forms through evaporation and condensation, leaving behind dissolved impurities.