All Free Everyday Science MCQs with Answers

1741. What inspired reflecting road lights to be invented?

• A. Car door reflecting mirrors
• B. The light a cat's eyes gave off on a fence
• C. Sun light on steel posts on road sides
• D. The sun light on the windshield

Explanation: The idea was inspired by the bright reflection from a cat's eyes when light struck them, caused by a reflective layer behind the retina. This principle led to reflective road markers and lights that return vehicle headlights toward drivers.

1742. The type of glass used in making lenses and prism is___________?

• A. Pyrex glass
• B. jena glass
• C. Flintglass
• D. Soft glass

Explanation: Flint glass is dense and has a high refractive index, making it suitable for optical lenses and prisms. Pyrex is valued mainly for heat resistance, while soft glass is not the standard optical choice.

1743. The Reason for a Swimming Pool to appear Less Deep than the actual depth is__________?

• A. Refraction
• B. Light scattering
• C. Reflection
• D. Interference

Explanation: Light from the pool bottom bends away from the normal as it passes from water into air, making the apparent depth smaller than the real depth. This bending of light is refraction, not reflection or scattering.

1744. Which statement about sound is true?

• A. Sound can't travel through vacuum
• B. Sound can't travel through glass
• C. Sound can't travel through water
• D. Non of theses

Explanation: Sound is a mechanical wave and needs a material medium, so it cannot travel through a vacuum. It can travel through solids such as glass and liquids such as water.

1745. The luster of diamond is due to_________?

• A. Reflection
• B. Total internal reflection
• C. Refraction
• D. None of these

Explanation: Diamond has a high refractive index, so light entering it can undergo repeated total internal reflection, producing its characteristic brilliance or luster. Ordinary reflection alone does not account for this strong sparkle.

1746. What are the primary colors of Pigment?

• A. White, Black, Blue
• B. Red, Yellow, Blue
• C. Red, Orange, Blue
• D. Red, Green, Blue

Explanation: The traditional primary pigments are red, yellow and blue, which can be mixed to produce a range of other colors. Red, green and blue are the primary colors of emitted light instead.

1747. What are the primary colors of Light?

• A. White, Black, Blue
• B. Red, Yellow, Blue
• C. Red, Orange, Blue
• D. Red, Green, Blue

Explanation: The primary colors of additive light are red, green and blue, commonly abbreviated RGB. Combining them in suitable intensities produces white light.

1748. Which of the following is a ferromagnetic material ?

• A. Tungsten
• B. Aluminium
• C. Copper
• D. Nickel

Explanation: Nickel is ferromagnetic, meaning it can be strongly magnetized and retain magnetic properties. Aluminium is paramagnetic, while copper and tungsten are not ferromagnetic.

1749. Who invented the Hot Air Balloon?

• A. Davy
• B. Montgolfier
• C. Edison
• D. Jarvik

Explanation: The Montgolfier brothers developed and demonstrated the first successful hot-air balloon in 1783. The other names are associated with different inventions or fields.

1750. P-waves is a term associated with__________?

• A. Earthquakes
• B. Oceans
• C. Wind
• D. Rivers

Explanation: P-waves, or primary waves, are the fastest seismic waves produced by earthquakes. They are compressional waves and can travel through solids and fluids.