Below is a formatted selection of 20 questions from the “Everyday Science MCQs” document, with the correct answer option bolded as requested. The questions, options, and structure remain unchanged, covering various topics (Physics, Chemistry, Biology, Astronomy, Geology, and Environmental Science) for a quiz or study form.

Everyday Science MCQs Quiz

Instructions: Select the correct answer from the given options. This quiz covers key concepts in Everyday Science for competitive exam preparation.

1. Which is the outermost planet in the solar system?
   A. Mercury
   B. Pluto
   C. Neptune
   D. Uranus
2. The SI unit of charge is:
   A. Ampere
   B. Coulomb
   C. Ohm
   D. Watt
3. Deficiency of Vitamin-A results in:
   A. Night blindness
   B. Rickets
   C. Scurvy
   D. Hair fall
4. For a fixed mass of gas at constant temperature, if we decrease volume, the pressure will:
   A. Also decrease
   B. Increase
   C. Remains constant
   D. None of these
5. The Sun is a:
   A. Star
   B. Planet
   C. Asteroid
   D. Meteor
6. The most abundant element in the universe is:
   A. Oxygen
   B. Hydrogen
   C. Carbon Dioxide
   D. Silicon
7. A camera uses a ______ to form an image.
   A. Convex lens
   B. Concave lens
   C. Condenser lens
   D. None of these
8. CNG stands for?
   A. Converted Natural Gas
   B. Conduced Natural Gas
   C. Conducted Natural Gas
   D. Compressed Natural Gas
9. When white light is passed through a prism, it splits into ______ colours.
   A. 5
   B. 6
   C. 7
   D. 8
10. Instrument used for measuring very high temperature is:
    A. Pyroscope
    B. Pyrometer
    C. Seismograph
    D. Xylometer
11. The nearest planet to the Earth is:
    A. Venus
    B. Mercury
    C. Mars
    D. Jupiter
12. Oxidation is a chemical reaction involving:
    A. Gain of Electrons
    B. Loss of Electrons
    C. Gain of Protons
    D. Loss of Protons
13. Einstein’s famous equation which states that mass and energy are interchangeable is?
    A. E = mc²
    B. E = cm²
    C. M = ec²
    D. M = ce²
14. What are the primary colours?
    A. White, Black, Blue
    B. Red, Yellow, Blue
    C. Red, Orange, Blue
    D. Red, Green, Blue
15. The source of oxygen in photosynthesis is:
    A. Water
    B. Salts
    C. Minerals
    D. Carbon dioxide
16. The fourth state of matter is:
    A. Water
    B. Salts
    C. Vapours
    D. Plasma
17. The device used to convert Alternating Current into Direct Current is called:
    A. Anemometer
    B. Battery
    C. Galvanometer
    D. Rectifier
18. Which type of rock may contain fossils?
    A. Igneous
    B. Metamorphic
    C. Sedimentary
    D. Crystals
19. The science of lightning is called:
    A. Aerology
    B. Meteorology
    C. Electeorology
    D. Fulminology
20. DNA structure was first described by:
    A. Pasteur
    B. Robert Koch
    C. Watson and Crick
    D. Carlous Linnaues