Everyday Science — All MCQs
2717 questions available
Q741.A wind which reverses seasonally is known as____?
Correct Answer: C
A monsoon is a seasonal wind that reverses direction depending on the time of year, often bringing heavy rainfall.
Q742.About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is?
Correct Answer: A
Oxygen makes up about 50% of the Earth's crust (including water and atmosphere) by mass, the most abundant element there.
Q743.According to Einsteins general theory of relativity the universe:____?
Correct Answer: C
Einstein's general theory of relativity implies that the universe cannot be static — it must be either expanding or contracting.
Q744.According to many, including the Guinness Book of World Record,____is the world’s rarest mineral?
Correct Answer: A
Painite is widely considered, including by the Guinness Book of World Records, to be the world's rarest mineral.
Q745.According to quantum theory of light, photons are ____?
Correct Answer: C
According to quantum theory, light consists of discrete photons, which are essentially packets (quanta) of energy.
Q746.According to Quark theory, there are ____ elementary particles.
Correct Answer: B
According to the Standard Model (often referenced loosely as 'quark theory'), there are six types (flavors) of quarks.
Q747.According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in____?
Correct Answer: C
A 100-watt bulb uses 1 kWh (one 'unit') of electricity after running for 10 hours (100W × 10h = 1000Wh = 1kWh).
Q748.According to the theory of relativity, which of the following always remains constant ?
Correct Answer: D
According to the theory of relativity, the speed of light in a vacuum remains constant for all observers, regardless of their relative motion.
Q749.According to which law gas is directly proportional to temperature?
Correct Answer: A
Charles's Law states that the volume of a gas is directly proportional to its absolute temperature at constant pressure.
Q750.Accumulation of salts in kidneys results ____?
Correct Answer: D
Accumulation of salts in the kidneys can crystallize and form kidney stones.
Q751.Acid rain is mainly caused by emissions of ____ in the atmosphere?
Correct Answer: D
Acid rain is mainly caused by atmospheric emissions of sulfur dioxide and nitrogen oxides, which react with water vapor to form acids.
Q752.Addison’s disease is caused by the deficiency of____?
Correct Answer: D
Addison's disease is caused by insufficient production of hormones (cortisol and aldosterone) due to adrenal gland dysfunction, often linked to low ACTH response.
Q753.Age of the lion is determined through?
Correct Answer: A
A lion's age can be roughly estimated by observing the darkening of its nose colour over time.
Q754.Ageusia is the loss of which sense?
Correct Answer: A
Ageusia refers to the complete loss of the sense of taste.
Q755.AIDS virus is____
Correct Answer: A
HIV, the virus that causes AIDS, is a single-stranded RNA retrovirus.
Q756.Air Conditioning Controls:____?
Correct Answer: D
Air conditioning systems typically control temperature, humidity, air circulation, and air quality — hence 'all of the above.'
Q757.Air contains volume of carbon dioxide approximately?
Correct Answer: D
Air contains approximately 0.03-0.04% carbon dioxide by volume.
Q758.Albert Einstein was a____?
Correct Answer: A
Albert Einstein was a theoretical physicist, best known for developing the theory of relativity.
Q759.All forms of energy that we use are ultimately transformed into____?
Correct Answer: B
Due to the second law of thermodynamics, all forms of usable energy eventually degrade into heat energy, the least ordered form of energy.
Q760.All matter is made of ____?
Correct Answer: D
All matter in the universe is composed of atoms, the basic building blocks of chemical elements.