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Everyday Science 2141 MCQs [All-Courses]

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Prepare effectively with our Everyday Science MCQs designed for PPSC, FPSC, NTS, OTS, PTS, AJKPSC, BPSC, KPPSC, PMS, CSS, and all competitive exams.
Our content covers Physics, Chemistry, Biology, Environment, Human Body, Inventions, Scientific Laws, and daily-life science concepts.
Strengthen your scientific understanding, improve MCQS accuracy, and boost your exam performance with well-structured and updated topics.

All Topics  2141

Which part of eye detect dim light photo copier:

A Cornea
B Rods
C Cones
D Iris
Correct Answer: Rods
Explanation:

  • Rods are light-sensitive cells in the retina that help us see in dim or low light conditions.
  • They are responsible for night vision, while cones detect colors and work in bright light.

Which instrument is used to measure the purity of Milk:

A Barometer
B Lactometer
C Nanometer
D None of these
Correct Answer: Lactometer
Explanation:

  • A lactometer is used to measure the specific gravity (density) of milk and helps detect the addition of water or other impurities.
  • A pure milk sample has a standard density range, and deviations indicate possible adulteration.

Which process is used by plants to convert a Co2 and sunlight in Glucose:

A Respiration
B Chloroplast
C Photosynthesis
D Transpiration
Correct Answer: Photosynthesis
Explanation:

  • Photosynthesis is the process by which plants use sunlight, carbon dioxide, and water to produce glucose (food) and oxygen. It converts light energy into chemical energy stored in sugars. 

What is Super Nova:

A Massive Steller Explosion
B Blast of earth
C Collection the stars
D None of these
Correct Answer: Massive Steller Explosion
Explanation:

  • A supernova is a powerful explosion that occurs when a star reaches the end of its life. It releases an enormous amount of energy and can shine brighter than an entire galaxy for a short time.

In an electro chemical cell the salt bridge act as:

A Increase the voltage
B To provide the source
C Connect to battery
D Allow movement to maintain charge balance
Correct Answer: Allow movement to maintain charge balance
Explanation:

  • It maintains electrical neutrality in both half-cells.
  • It allows movement of ions to balance charge.
  • It completes the internal circuit of the electrochemical cell.

In cleaning garments used ammonia why used as cleaning agent:

A Weak Acid
B Strong Acid
C Weak Base
D Alkaline
Correct Answer: Weak Base
Explanation:

  • Being a weak base, ammonia helps in breaking down dirt, oils, and grease.
  • It removes stains without damaging cloth fibers when used in dilute form.
  • It also helps in eliminating bad odors from garments.

The process in which vapors converted in liquid is called:

A Evaporation
B Condensation
C Hydration
D None of these
Correct Answer: Condensation
Explanation:

  • Condensation is the process in which vapors (gas) are converted into liquid.
  • It happens when gas cools down and loses heat energy.
  • Example: water droplets forming on a cold glass.

An element which is common in containers bauxite ore medicines and cosmetics and obtain from:

A Magnesium
B Aluminum
C Calcium
D Potassium
Correct Answer: Aluminum
Explanation:


  • Aluminium is commonly used in containers, medicines, and cosmetics.

  • It is obtained from bauxite ore, which is its main source.

  • It is lightweight, durable, and resistant to corrosion.

The most abundant element in the universe is:

A Nitrogen
B Oxygen
C Hydrogen
D Carbon
Correct Answer: Hydrogen
Explanation:


  • Hydrogen is the most abundant element in the universe.

  • It makes up about 75% of the universe's normal matter by mass.

  • Stars, including the Sun, are composed mainly of hydrogen.

In photosynthesis the green color of plant is due to which pigment:

A Leucoplast
B Chromoplast
C Chloroplast
D None of these
Correct Answer: Chloroplast
Explanation:

  • Chloroplast is a green cell organelle found in plant cells.

  • It contains chlorophyll pigment and is the site where photosynthesis takes place.

  • It helps plants make food using sunlight, water, and carbon dioxide.

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