CSS - PMS - CCE - PCS - General Science
Insulin
Insulin mainly helps regulate:
A. Blood glucose level
B. Hair color
C. Bone length only
D. Eye shape
Correct Answer: A
A: Correct because insulin lowers and regulates blood glucose by helping cells take up glucose. B: Wrong because hair color depends mainly on pigments and genetics. C: Wrong because bone length is regulated by growth and hormones, not insulin alone. D: Wrong because eye shape is not regulated by insulin.
CSS - PMS - CCE - PCS - General Science
Mitosis
Mitosis is a process of:
A. Cell division producing identical cells
B. Digestion of fats
C. Evaporation of water
D. Formation of clouds only
Correct Answer: A
A: Correct because mitosis produces genetically identical daughter cells for growth and repair. B: Wrong because fat digestion involves enzymes and bile. C: Wrong because evaporation is a physical process of water. D: Wrong because cloud formation is a weather process.
CSS - PMS - CCE - PCS - General Science
Basic Chemistry - Atoms and Molecules
The nucleus of an atom mainly contains:
A. Electrons only
B. Protons and neutrons
C. Photons only
D. Water molecules
Correct Answer: B
A: Wrong because electrons are outside the nucleus in orbitals/clouds. B: Correct because the nucleus contains protons and neutrons. C: Wrong because photons are light particles, not nuclear particles. D: Wrong because atoms do not have water molecules in their nucleus.
CSS - PMS - CCE - PCS - General Science
Light (Optics) - Refraction
The approximate speed of light in vacuum is:
A. 3 × 10⁸ m/s
B. 3 × 10⁶ m/s
C. 300 m/s
D. 30 km/h
Correct Answer: A
A: Correct because light travels at about 3 × 10⁸ metres per second in vacuum. B: Wrong because it is 100 times smaller than the accepted value. C: Wrong because this is closer to speed of sound scale, not light. D: Wrong because 30 km/h is ordinary vehicle speed.
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
Earth revolves around:
A. The Moon
B. The Sun
C. Mars
D. Jupiter
Correct Answer: B
A: Wrong because the Moon revolves around Earth. B: Correct because Earth orbits the Sun. C: Wrong because Earth does not revolve around Mars. D: Wrong because Earth does not revolve around Jupiter.
CSS - PMS - CCE - PCS - General Science
Acid/Base
A solution with pH less than 7 is:
A. Neutral
B. Acidic
C. Basic
D. Radioactive
Correct Answer: B
A: Wrong because neutral solutions have pH 7. B: Correct because pH below 7 indicates acidity. C: Wrong because basic solutions have pH greater than 7. D: Wrong because radioactivity is unrelated to pH.
CSS - PMS - CCE - PCS - General Science
DNA
DNA mainly carries:
A. Genetic information
B. Sound waves
C. Electric current
D. Digestive enzymes only
Correct Answer: A
A: Correct because DNA stores hereditary genetic instructions. B: Wrong because sound waves are mechanical waves. C: Wrong because electric current is flow of charge. D: Wrong because enzymes are proteins and DNA is not limited to digestion.
CSS - PMS - CCE - PCS - General Science
Measurement Units
The SI unit of force is:
A. Joule
B. Newton
C. Watt
D. Pascal
Correct Answer: B
A: Wrong because joule is the unit of energy. B: Correct because force is measured in newtons. C: Wrong because watt is the unit of power. D: Wrong because pascal is the unit of pressure.
CSS - PMS - CCE - PCS - General Science
Human Heart
The human heart has how many chambers?
A. Two
B. Three
C. Four
D. Five
Correct Answer: C
A: Wrong because humans have more than two chambers. B: Wrong because three chambers are found in some other animals, not humans. C: Correct because the human heart has two atria and two ventricles. D: Wrong because the human heart does not have five chambers.
CSS - PMS - CCE - PCS - General Science
Photosynthesis
Photosynthesis mainly uses carbon dioxide, water and light to produce:
A. Glucose and oxygen
B. Nitrogen and salt
C. Iron and copper
D. Helium and hydrogen
Correct Answer: A
A: Correct because plants make glucose and release oxygen during photosynthesis. B: Wrong because nitrogen and salt are not the main products. C: Wrong because metals are not produced by photosynthesis. D: Wrong because these gases are not photosynthesis products.
CSS - PMS - CCE - PCS - General Science
Evaporation
At sea level, pure water normally boils at:
A. 0°C
B. 37°C
C. 100°C
D. 212°C
Correct Answer: C
A: Wrong because 0°C is the freezing point of water. B: Wrong because 37°C is close to normal human body temperature. C: Correct because water boils at 100°C at standard atmospheric pressure. D: Wrong because 212 is the boiling point in Fahrenheit, not Celsius.
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
Which planet is known as the Red Planet?
A. Venus
B. Mars
C. Jupiter
D. Saturn
Correct Answer: B
Correct Answer: B. Mars
Fact Check: Mars appears reddish-orange because its surface contains large amounts of iron oxide (rust). Just as iron rusts on Earth and turns reddish-brown, the iron-rich dust and rocks on Mars give the entire planet a red appearance when viewed from space. > Position from the Sun 4th planet > Nickname Red Planet Color Cause Iron oxide (rust) > Moons 2 (Phobos and Deimos) > Day Length 24 hours 37 minutes > Largest Volcano Olympus Mons (largest volcano in the Solar System) > Atmosphere Mostly carbon dioxide.
A. Venus is not correct because it does not match the verified fact: Mars appears reddish-orange because its surface contains large amounts of iron oxide (rust).
B. Correct — Mars is right because Mars appears reddish-orange because its surface contains large amounts of iron oxide (rust).
C. Jupiter is not correct because it does not match the verified fact: Mars appears reddish-orange because its surface contains large amounts of iron oxide (rust).
D. Saturn is not correct because it does not match the verified fact: Mars appears reddish-orange because its surface contains large amounts of iron oxide (rust).
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
Modern military explosives are designed to be:
A. Highly unstable
B. Controlled and powerful
C. Weak
D. Non-reactive
Correct Answer: B
Safety + power balance required.
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
The main danger of explosives is:
A. Slow reaction
B. Uncontrolled explosion
C. No reaction
D. Cooling effect
Correct Answer: B
Can cause accidental detonation.
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
Oxygen source in explosives is called:
A. Fuel
B. Oxidizer
C. Catalyst
D. Solvent
Correct Answer: B
Supplies oxygen for combustion.
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
Explosives react mainly through:
A. Reduction
B. Oxidation
C. Neutralization
D. Evaporation
Correct Answer: B
Rapid oxidation releases energy.
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
TNT is considered a:
A. Primary explosive
B. Secondary explosive
C. Fuel
D. Gas
Correct Answer: B
It needs detonator.
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
The term “blast wave” refers to:
A. Heat only
B. Shock wave from explosion
C. Smoke only
D. Light wave
Correct Answer: B
High-pressure wave caused by explosion.
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
Modern explosives are mainly used in:
A. Cooking
B. Mining and defense
C. Painting
D. Farming
Correct Answer: B
Industrial and military use.
CSS - PMS - CCE - PCS - General Science
Applied Chemistry - Explosives
Explosives are dangerous due to:
A. Low energy
B. Rapid energy release
C. Slow reaction
D. No reaction
Correct Answer: B
Sudden release causes destruction.