General MCQs
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Q261.A transformer works on the principle of ____?
Correct Answer: B
A transformer works on the principle of mutual induction, where a changing current in one coil induces a voltage in a nearby coil.
Q262.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.
Q263.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.
Q264.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.
Q265.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.
Q266.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.
Q267.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.
Q268.Accumulation of salts in kidneys results ____?
Correct Answer: D
Accumulation of salts in the kidneys can crystallize and form kidney stones.
Q269.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.
Q270.Ageusia is the loss of which sense?
Correct Answer: A
Ageusia refers to the complete loss of the sense of taste.
Q271.AIDS virus is____
Correct Answer: A
HIV, the virus that causes AIDS, is a single-stranded RNA retrovirus.
Q272.Air Conditioning Controls:____?
Correct Answer: D
Air conditioning systems typically control temperature, humidity, air circulation, and air quality — hence 'all of the above.'
Q273.Albert Einstein was a____?
Correct Answer: A
Albert Einstein was a theoretical physicist, best known for developing the theory of relativity.
Q274.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.
Q275.All matter is made of ____?
Correct Answer: D
All matter in the universe is composed of atoms, the basic building blocks of chemical elements.
Q276.All of the following are electromagnetic radiations except____?
Correct Answer: B
Sound waves are mechanical waves requiring a medium, unlike electromagnetic radiations (light, radio, X-rays, etc.) which can travel through a vacuum.
Q277.All of the following foods contain carbohydrates except.
Correct Answer: B
Meat contains negligible carbohydrates compared to plant-based foods like grains, fruits, and vegetables.
Q278.All of the following statements are incorrect except:
Correct Answer: A
In scientific work, both precision (consistency of results) and accuracy (closeness to true value) are important and should go hand in hand.
Q279.All of the following substances are crystalline except____?
Correct Answer: D
Plastic is typically amorphous (non-crystalline) in structure, unlike crystalline substances such as salt or sugar.
Q280.All of these are benefits of bacteria except ____?
Correct Answer: B
Bacteria provide benefits like decomposition, nitrogen fixation, and digestion aid, but they are not a significant source of oxygen production (that's mainly plants and algae).