CORRECT ANSWERS WITH RATIONALES
LATEST UPDATE 2026/2027
Questions 1-50: General Science & Nature
1. What is the chemical symbol for Gold?
A) Go
B) Gd
C) Au
D) Ag
Correct Answer: C) Au
Rationale: The symbol 'Au' comes from the Latin word for gold, *aurum*.
2. What planet is known as the "Red Planet"?
A) Venus
B) Jupiter
C) Mars
D) Saturn
Correct Answer: C) Mars
Rationale: Mars has a reddish appearance due to iron oxide (rust) on its
surface.
,3. What is the hardest natural substance on Earth?
A) Gold
B) Iron
C) Diamond
D) Platinum
Correct Answer: C) Diamond
Rationale: Diamond is an allotrope of carbon with a very strong tetrahedral
structure, making it the hardest known natural material.
4. What is the largest organ in the human body?
A) Liver
B) Heart
C) Skin
D) Brain
Correct Answer: C) Skin
Rationale: The skin is the body's largest organ, accounting for about 15%
of body weight.
5. What is the process by which plants make their food?
A) Respiration
B) Photosynthesis
C) Fermentation
,D) Transpiration
Correct Answer: B) Photosynthesis
Rationale: Photosynthesis is the process where plants use sunlight, water,
and carbon dioxide to create oxygen and energy in the form of sugar.
6. What is the atomic number of Carbon?
A) 4
B) 6
C) 8
D) 12
Correct Answer: B) 6
Rationale: Carbon has 6 protons in its nucleus, defining its atomic number.
7. What causes the tides in the ocean?
A) The Wind
B) The Sun
C) The Moon
D) Earthquakes
Correct Answer: C) The Moon
Rationale: The moon's gravitational pull is the primary force causing ocean
tides.
8. What is the speed of light approximately?
, A) 300,000 km/s
B) 100,000 km/s
C) 30,000 km/s
D) 3,000,000 km/s
Correct Answer: A) 300,000 km/s
Rationale: Light travels at approximately 299,792 kilometers per second in
a vacuum.
9. What type of blood cells fight infections?
A) Red blood cells
B) Platelets
C) White blood cells
D) Plasma
Correct Answer: C) White blood cells
Rationale: White blood cells (leukocytes) are the primary cells of the
immune system.
10. Which element is necessary for combustion?
A) Nitrogen
B) Hydrogen
C) Carbon Dioxide
D) Oxygen
Correct Answer: D) Oxygen