All Free Everyday Science MCQs with Answers

1891. Silicon is an example of _________?

• A. No-conductor
• B. Semiconductor
• C. Super Conductor
• D. None of these

Explanation: Silicon is a semiconductor because its electrical conductivity lies between that of conductors and insulators and can be controlled by doping. This property makes it central to electronic chips and solar cells.

1892. Who invented bifocal eyeglasses?

• A. Ibn-e-Haitem
• B. Benjamin Franklin
• C. Archemedes
• D. None

Explanation: Benjamin Franklin invented bifocal spectacles in the 18th century by combining lenses for distance and near vision in one pair. Ibn al-Haytham made important contributions to optics but did not invent bifocals.

1893. Which of the following mixture of gases is required in gas welding?

• A. Oxygen and ethylene
• B. Oxygen and hydrogen
• C. Acetylene and oxygen
• D. Acetylene and hydrogen

Explanation: Gas welding commonly uses acetylene burned in oxygen because the oxyacetylene flame reaches a very high temperature. Hydrogen and oxygen can burn, but they are not the standard gas-welding mixture intended here.

1894. Who invented the first battery?

• A. Alessandro volta
• B. Tim Berner
• C. Rob Stothard
• D. Georges Leclanche

Explanation: Alessandro Volta invented the voltaic pile in 1800, widely regarded as the first true battery. The unit of electric potential, the volt, is named after him.

1895. Very small time intervals are accurately measured by the___________?

• A. Pabsars
• B. White dwarfs
• C. Atomic Clocks
• D. None of these

Explanation: Atomic clocks measure time using the highly stable frequency of atomic transitions, especially in cesium or rubidium atoms. Their stability allows extremely small time intervals to be measured accurately.

1896. Who invented Logarithm Tables?

• A. John Napier
• B. John Doe
• C. John Harrison
• D. John Douglas

Explanation: John Napier introduced logarithms and published the first logarithm tables in 1614. These tables transformed difficult multiplication and division into simpler addition and subtraction.

1897. Analytical solutions to Quadratic equations were introduced by__________?

• A. Al-Khawarzimi
• B. Al-haitham
• C. IsasacNewton
• D. Pythagoras

Explanation: Al-Khwarizmi gave systematic algebraic methods for solving quadratic equations, helping establish algebra as a distinct mathematical discipline. The other listed scientists are associated with different areas of mathematics or science.

1898. Calculus was invented by________?

• A. Al-khawarzimi
• B. Pythagoras
• C. IsaaC Newton
• D. Al.kindi

Explanation: Isaac Newton is conventionally credited in basic science texts as a co-inventor of calculus, developed independently at about the same time as Gottfried Leibniz. Pythagoras and Al-Khwarizmi made major contributions to other mathematical fields.

1899. Science is derived from Latin word "scientia" which means_________?

• A. Reasoning
• B. Logic
• C. Knowledge
• D. Life

Explanation: The Latin word scientia means “knowledge,” and it is the source of the modern word science. Reasoning and logic are methods used in science, not the literal meaning of scientia.

1900. Air Conditioning Controls:___________?

• A. Circulation of the Air
• B. Humidity
• C. Temperature
• D. All of The Above

Explanation: An air conditioner regulates temperature, removes or adds moisture to control humidity, and circulates air through the room. Therefore all three functions are included.