Everyday Science — All MCQs
2717 questions available
Q2641.Which gas is commonly used in balloons?
Correct Answer: B
Helium is used to fill balloons because it is lighter than air and safe (non-flammable).
Q2642.The Earth rotates around its:
Correct Answer: B
The Earth rotates around its Axis.
Q2643.What is a tidal pattern with two nearly equal high tides and two nearly equal low tides per lunar day called?
Correct Answer: B
This tidal pattern is called a 'Semidiurnal tide'.
Q2644.How many times sound travel faster than air?
Correct Answer: A
Sound travels roughly four times faster in water than in air, due to water's greater density and elasticity.
Q2645.Which is a rich plant source of provitamin A?
Correct Answer: B
Leafy green vegetables contain beta-carotene, which the body converts to vitamin A.
Q2646.How does temperature affect the speed of light in a vacuum?
Correct Answer: C
The speed of light in a vacuum is constant and does not depend on temperature.
Q2647.Who invented steam Engine?
Correct Answer: A
James Watt significantly improved and is widely credited with inventing the practical steam engine.
Q2648.Who discoverd the solar system?
Correct Answer: B
Nicolaus Copernicus proposed the heliocentric (Sun-centered) model of the solar system.
Q2649.Pure limstone is called_____
Correct Answer: B
Pure limestone is composed mainly of Calcium Carbonate (CaCO3).
Q2650.Which gas is used in a fire extinguishers?
Correct Answer: A
Carbon dioxide (CO2) and Nitrogen are commonly used in fire extinguishers as they smother flames by displacing oxygen.
Q2651.Which heating element is most effective?
Correct Answer: C
Nichrome (an alloy of nickel and chromium) is widely used as a heating element due to its high resistance and resistance to oxidation at high temperatures.
Q2652.Mirror is related to 'Reflection' in the same way as 'Water' is related to
Correct Answer: C
Just as a mirror causes Reflection, water (or a similar medium) causes Refraction of light.
Q2653.Our earth is divided into how many climate zones?
Correct Answer: C
Earth is broadly divided into three main climate zones (Tropical, Temperate, Polar).
Q2654.The doctor recommended ______tablets and asked to drink _______of water
Correct Answer: C
Some/plenty' correctly completes both blanks.
Q2655.Choose analogous pair Light: Blind
Correct Answer: C
A Blind person cannot perceive Light; similarly, a Dumb person cannot produce Speech — both describe an inability tied to a specific sense/function.
Q2656.Choose analogous pair Light: Glint
Correct Answer: C
A Glint is a brief, sudden flash of Light; a Blare is a loud, sudden burst of Sound — the same intensity relationship.
Q2657.The Unit of gas bill is:
Correct Answer: A
Gas consumption for billing is typically measured in BTU (British Thermal Units) or related heat-energy units.
Q2658.Which Country first introduce Typhoid Vaccine
Correct Answer: C
Per the marked key, Pakistan is credited here with the typhoid conjugate vaccine rollout milestone.
Q2659.Is Parcham Ke Saye Talay sung by:
Correct Answer: A
Is Parcham Ke Saye Talay' was sung by Nayyara Noor.
Q2660.Which planet revolves in Clockwise rotation around sun and seen from earth?
Correct Answer: B
Venus is unusual in that it rotates clockwise (retrograde rotation) when viewed from above its north pole, unlike most planets.