Everyday Science — All MCQs
2717 questions available
Q821.Atephobia is fear of ____?
Correct Answer: A
Atelophobia (often referenced as 'atephobia') is the fear of imperfection or not being good enough.
Q822.Atmosphere is held in place by?
Correct Answer: B
A planet's atmosphere is held in place by its gravitational pull.
Q823.Atmospheric pressure at sea level is ____?
Correct Answer: B
Standard atmospheric pressure at sea level is 760 mm of mercury (Hg).
Q824.Atmospheric pressure decrease rapidly with altitude because the air becomes____ ?
Correct Answer: B
Atmospheric pressure decreases rapidly with altitude because the air becomes less dense at higher elevations.
Q825.Atmospheric pressure is the force (per unit-area) perpendicular to a unit-area of planetary surface, as determined by ____.
Correct Answer: C
Atmospheric pressure is determined by the weight of the vertical column of air (atmospheric gases) above a given surface area.
Q826.Atmospheric temperature increases at the higher altitudes due to____?
Correct Answer: B
Temperature can increase at higher altitudes (e.g., in the stratosphere) due to absorption of solar radiation by ozone, though this passage attributes it broadly to atmospheric heat transfer processes.
Q827.Atom is made up of____different kinds of subatomic particles:
Correct Answer: A
An atom is made up of three main subatomic particles: protons, neutrons, and electrons.
Q828.Atomic power plant works on the principle of?
Correct Answer: A
Atomic (nuclear) power plants generate energy through controlled nuclear fission reactions.
Q829.Average salinity or ratio of salt as per kilogram of water of ocean is____?
Correct Answer: A
The average salinity of ocean water is about 35 grams of dissolved salts per kilogram of seawater.
Q830.Aviation fuel for Jet Aeroplanes consists of purified____?
Correct Answer: B
Jet aviation fuel is essentially a highly refined and purified form of kerosene.
Q831.B12 deficiency can produce____?
Correct Answer: C
Vitamin B12 deficiency can lead to pernicious anemia, characterized by insufficient healthy red blood cells.
Q832.Balloons are filled with ____ ?
Correct Answer: B
Balloons (like party or weather balloons) are commonly filled with helium, a gas lighter than air.
Q833.Bamboo is a____?
Correct Answer: B
Bamboo, despite its woody appearance, is botanically classified as a grass.
Q834.Barnacles growing on the back of whale is an example for ____?
Correct Answer: D
Barnacles growing on a whale's back is a classic example of commensalism, where the barnacle benefits (transport, food access) without harming the whale.
Q835.Basha Dam is to be constructed on____?
Correct Answer: D
The Basha Dam (Diamer-Bhasha Dam) is being constructed on the Indus River in Gilgit-Baltistan, Pakistan.
Q836.Basic metals can be converted into gold by ?
Correct Answer: C
Base metals can theoretically be converted into gold through artificial nuclear transmutation (radioactivity), not ordinary chemical means.
Q837.Basidiospores are considered to be a major source of ____?
Correct Answer: A
Basidiospores, released by certain fungi, are a major source of airborne allergens that can trigger respiratory allergies.
Q838.Bats can also fly in dark because they are capable of taking the help of ____?
Correct Answer: B
Bats navigate and hunt in the dark using echolocation — emitting ultrasonic waves and interpreting their echoes.
Q839.Bauxite is an ore of____?
Correct Answer: C
Bauxite is the primary ore from which aluminium is extracted.
Q840.BCG vaccine is used to produce immunity against____?
Correct Answer: B
The BCG vaccine provides immunity against tuberculosis (TB).