All Free Everyday Science MCQs with Answers

1711. By which process does the smell of cooking spread to all the rooms in a house?

• A. Distillation
• B. Diffusion
• C. Decomposition
• D. Displacement

Explanation: Diffusion causes cooking-smell molecules to move from the region of higher concentration near the kitchen into rooms where their concentration is lower. Distillation and decomposition are unrelated processes.

1712. Which of the following waves have smallest velocity in vacuum?

• A. Ultraviolet
• B. Sound
• C. Infra-Red
• D. Micro

Explanation: Sound cannot propagate through a vacuum because it needs a material medium, so it has no meaningful velocity there. Ultraviolet, infrared, and microwaves are electromagnetic waves and all travel at the same speed in vacuum.

1713. The process whereby energy is dissipated from the oscillating system is called__________?

• A. Oscillation
• B. Damping
• C. Resonance
• D. None of these

Explanation: Damping is the gradual loss of energy from an oscillating system due to friction or resistance, causing its amplitude to decrease. Resonance, by contrast, is the large response produced when a system is driven at its natural frequency.

1714. Internal friction of fluid is called_________?

• A. Viscosity
• B. Surface tension
• C. Resistance
• D. Cohesive force

Explanation: Viscosity is the internal friction that opposes the relative motion of adjacent layers in a fluid. Surface tension acts at a liquid surface, so it is not the same property.

1715. According to which law gas is directly proportional to temperature?

• A. Charles Law
• B. Boyles Law
• C. Grams Law
• D. Dalton's Law

Explanation: Charles’s law states that, at constant pressure, a gas’s volume increases directly with its absolute temperature. Boyle’s law instead relates pressure and volume inversely at constant temperature.

1716. Who said that light is made of corpuscles/particles?

• A. Maxwell
• B. Einstein
• C. Newton
• D. Huygein

Explanation: Newton proposed the corpuscular theory, which treated light as a stream of tiny particles or corpuscles. Maxwell’s work described light as an electromagnetic wave, while Einstein later explained light quanta.

1717. Albert Einstein was a____________?

• A. Physicist
• B. Physician
• C. Chemist
• D. Biologist

Explanation: Albert Einstein was a physicist whose work explained the photoelectric effect, special and general relativity, and the relationship between mass and energy. He was not a physician, despite the similar spelling of that option.

1718. Which of the following science is considered "mother of all sciences"?

• A. Biology
• B. Mathematics
• C. Physics
• D. Chemistry

Explanation: Mathematics is often called the mother of all sciences because it provides the language and quantitative tools used to express scientific laws. This is a conventional description rather than a strict scientific classification.

1719. speed of sound in dry air at 20 °C is___________?

• A. 353 m/s
• B. 345 m/s
• C. 343 m/s
• D. none of them

Explanation: At 20 °C, sound travels through dry air at approximately 343 metres per second. The speed changes with temperature, which is why values such as 331 m/s apply to colder air.

1720. Sound travels about ___________times faster in water than in air.

• A. 2
• B. 3
• C. 4
• D. 5

Explanation: Sound travels at about 1,480 m/s in water compared with about 343 m/s in air, giving a ratio a little over four. Thus, the nearest whole-number estimate is four times faster.