Master Science MCQs for IBA and Sindh Government Job Exams

Mastering Science MCQs: Your Ultimate Guide for Exam Success

Science is a crucial subject in various competitive exams. Mastering science MCQs (Multiple Choice Questions) can help boost your score significantly, especially in one-paper exams and entrance tests for jobs like IBA and Sindh Police Constable roles. This guide will focus on how to excel in science MCQs, providing you with high-yield tips and must-know topics.

Key Science Topics for MCQs

To tackle science MCQs effectively, you need to focus on core topics. These include:

Basic Physics: Expect questions on concepts like Newton's laws, forces, and electricity.
Chemistry Fundamentals: Topics like chemical reactions, the periodic table, and common compounds such as NaCl (salt) and H₂O (water) are vital.
Biology Basics: Knowledge of human anatomy, including the role of organs like the heart and lungs, and processes like photosynthesis is critical.
Earth and Space Science: Focus on understanding the solar system, planets like Venus and Jupiter, and natural resources.

Why Science MCQs Matter

Whether you're preparing for job assessments or educational entrance exams, science MCQs test not only your memorization but also your understanding of key concepts. This makes regular practice essential for success.

Tips to Ace Science MCQs

Daily Practice: Consistently solving science MCQs helps reinforce knowledge.
Review Common Questions: Focus on frequently asked topics like the pH of water, the periodic table, and photosynthesis.
Time Management: Learn to solve MCQs quickly and efficiently by practicing under timed conditions.

By mastering science MCQs with these tips and focusing on essential topics, you'll enhance your chances of success in competitive exams like IBA jobs and one-paper tests.

This brief guide offers the knowledge and strategy needed to excel in science MCQs—paving your way to exam success.

Science MCQs

What is the chemical symbol for water?
- H₂
- O₂
- H₂O
- CO₂
What is the closest planet to the Sun?
- Earth
- Mercury
- Venus
- Mars
What is the powerhouse of the cell?
- Ribosome
- Nucleus
- Mitochondria
- Endoplasmic Reticulum
Which gas is most abundant in Earth's atmosphere?
- Oxygen
- Carbon Dioxide
- Nitrogen
- Hydrogen
What force pulls objects toward Earth's center?
- Magnetism
- Gravity
- Friction
- Inertia
What is the primary source of energy for Earth?
- Wind
- Fossil Fuels
- Sun
- Water
Which planet is known as the Red Planet?
- Earth
- Venus
- Mars
- Jupiter
What is the hardest natural substance on Earth?
- Gold
- Iron
- Graphite
- Diamond
Which gas do plants use for photosynthesis?
- Oxygen
- Hydrogen
- Methane
- Carbon Dioxide
What is the boiling point of water at sea level?
- 100°C
- 90°C
- 80°C
- 110°C
How many bones are in the human body?
- 200
- 206
- 210
- 190
What is the chemical formula of carbon dioxide?
- CO
- O₂
- CO₂
- C₂O
What is the speed of light?
- 100,000 km/s
- 200,000 km/s
- 250,000 km/s
- 300,000 km/s
Which planet is known as the Earth's twin?
- Mars
- Venus
- Jupiter
- Saturn
What part of the plant conducts photosynthesis?
- Roots
- Flowers
- Leaves
- Stems
What is the most abundant element in the universe?
- Oxygen
- Carbon
- Helium
- Hydrogen
How long does it take for light from the Sun to reach Earth?
- 5 minutes
- 8 minutes
- 10 minutes
- 12 minutes
Which organ is primarily responsible for filtering blood?
- Lungs
- Heart
- Stomach
- Kidneys
Which is the smallest planet in the Solar System?
- Earth
- Mars
- Venus
- Mercury
What is the basic unit of life?
- Tissue
- Organ
- Cell
- Molecule
Who is known as the father of modern physics?
- Isaac Newton
- Albert Einstein
- Galileo Galilei
- Marie Curie
What is the chemical symbol for gold?
- Au
- Ag
- Fe
- Au
Which planet has the most moons?
- Earth
- Venus
- Jupiter
- Mars
What is the largest organ in the human body?
- Heart
- Lungs
- Brain
- Skin
What gas do humans exhale?
- Carbon Dioxide
- Oxygen
- Nitrogen
- Hydrogen
What is the study of plants called?
- Zoology
- Geology
- Ecology
- Botany
Which part of the atom has a positive charge?
- Electron
- Proton
- Neutron
- Nucleus
What is the main gas found in the air we breathe?
- Oxygen
- Nitrogen
- Carbon Dioxide
- Helium
What is the hottest planet in the Solar System?
- Mars
- Mercury
- Venus
- Jupiter
Which vitamin is produced when a person is exposed to sunlight?
- Vitamin A
- Vitamin B
- Vitamin C
- Vitamin D
What is the most common gas in the Earth's atmosphere?
- Oxygen
- Carbon Dioxide
- Nitrogen
- Hydrogen
What is the main element found in the Sun?
- Oxygen
- Helium
- Carbon
- Hydrogen
Which element is necessary for the production of nuclear energy and weapons?
- Gold
- Silver
- Plutonium
- Uranium
Which organ in the human body is responsible for pumping blood?
- Lungs
- Liver
- Kidneys
- Heart
What planet is known as the "Blue Planet"?
- Mars
- Saturn
- Earth
- Neptune
Which of the following is a non-renewable resource?
- Wind
- Coal
- Solar
- Hydroelectric
Which particle has a negative charge?
- Proton
- Neutron
- Nucleus
- Electron
Which planet is known for having a ring system?
- Mars
- Venus
- Jupiter
- Saturn
What is the largest planet in our solar system?
- Earth
- Jupiter
- Saturn
- Mars
What is the chemical symbol for sodium?
- S
- Na
- N
- So
Which part of the plant absorbs water and minerals?
- Stem
- Leaf
- Flower
- Root
What is the most common blood type in humans?
- O+
- O-
- A+
- AB-
What is the study of the universe known as?
- Geology
- Meteorology
- Astronomy
- Oceanography
Which planet is known as the gas giant?
- Mars
- Venus
- Jupiter
- Earth
What is the center of an atom called?
- Proton
- Electron
- Neutron
- Nucleus
What is the only planet in our solar system known to support life?
- Mars
- Earth
- Jupiter
- Venus
Which human organ is responsible for digestion?
- Heart
- Lungs
- Kidneys
- Stomach
What is the process by which plants make their food called?
- Respiration
- Digestion
- Transpiration
- Photosynthesis
Which element is necessary for human respiration?
- Hydrogen
- Oxygen
- Carbon
- Helium
Which planet has the Great Red Spot?
- Earth
- Mars
- Jupiter
- Saturn
What is the pH level of water?
- 6
- 7
- 8
- 5
What is the unit of electrical resistance?
- Volt
- Ohm
- Watt
- Ampere
What is the main gas that makes up the Sun?
- Oxygen
- Hydrogen
- Carbon
- Nitrogen
What is the chemical symbol for potassium?
- P
- Po
- Kt
- K
Which organ in the body produces insulin?
- Liver
- Kidney
- Pancreas
- Heart
What is the smallest bone in the human body?
- Femur
- Rib
- Ulna
- Stapes
What is the most common isotope of hydrogen?
- Deuterium
- Protium
- Tritium
- Hydronium
What gas is released by plants during photosynthesis?
- Oxygen
- Carbon Dioxide
- Hydrogen
- Nitrogen
Which vitamin is important for maintaining healthy vision?
- Vitamin B
- Vitamin C
- Vitamin D
- Vitamin A
Which part of the brain controls memory?
- Cerebellum
- Brainstem
- Hippocampus
- Cerebrum
What is the SI unit of force?
- Joule
- Watt
- Newton
- Pound
Which element is found in all organic compounds?
- Oxygen
- Hydrogen
- Nitrogen
- Carbon
What is the chemical formula for common salt?
- KCl
- NaOH
- NaCl
- HCl
Which organ is affected by pneumonia?
- Liver
- Heart
- Kidneys
- Lungs
What is the process of converting liquid into gas?
- Condensation
- Freezing
- Evaporation
- Sublimation
What is the closest star to Earth?
- Polaris
- Sirius
- Alpha Centauri
- The Sun
Which gas is also known as laughing gas?
- Carbon Dioxide
- Oxygen
- Helium
- Nitrous Oxide
Which blood cells help in clotting?
- Red Blood Cells
- White Blood Cells
- Plasma
- Platelets
What is the main component of natural gas?
- Butane
- Propane
- Methane
- Ethane
Which acid is found in the stomach?
- Acetic Acid
- Citric Acid
- Hydrochloric Acid
- Lactic Acid
Which gas is essential for combustion?
- Hydrogen
- Carbon Dioxide
- Nitrogen
- Oxygen
What is the most abundant metal in Earth's crust?
- Iron
- Aluminum
- Copper
- Magnesium
What type of energy is stored in a stretched rubber band?
- Kinetic Energy
- Thermal Energy
- Chemical Energy
- Elastic Potential Energy
What is the chemical formula for water?
- H₂
- O₂
- CO₂
- H₂O
Which planet is known as the "Morning Star"?
- Mars
- Venus
- Jupiter
- Saturn
Which type of rock is formed from cooled magma or lava?
- Sedimentary
- Metamorphic
- Organic
- Igneous
Which vitamin is essential for blood clotting?
- Vitamin A
- Vitamin C
- Vitamin D
- Vitamin K
Which particle in the atom has no electric charge?
- Proton
- Electron
- Neutron
- Nucleus
Which gas is used in the treatment of cancer?
- Oxygen
- Nitrogen
- Carbon Dioxide
- Radon
Which planet is the farthest from the Sun?
- Uranus
- Neptune
- Pluto
- Saturn
What is the boiling point of water in degrees Fahrenheit?
- 180°F
- 212°F
- 220°F
- 200°F
What is the most abundant gas in the atmosphere of Mars?
- Oxygen
- Hydrogen
- Carbon Dioxide
- Nitrogen