These essential MCQ questions are selected from the most important topics in the Sainik School entrance examination 2026. Sections include Physics, Chemistry, Biology, Environmental Science and General Science for Class 6 and Class 9 admission. For truely unlimited daily MCQ practice, visit Vooo AI Education.
⚔️ Sainik School Science
1Which planet is known as the Red Planet?
Answer: C — Mars
Mars is called the Red Planet because its surface is covered with iron oxide (rust), giving it a reddish appearance. It is the fourth planet from the Sun and has two small moons.
Mars is called the Red Planet because its surface is covered with iron oxide (rust), giving it a reddish appearance. It is the fourth planet from the Sun and has two small moons.
2Bones are connected to muscles by:
Answer: B — Tendons
Tendons are tough fibrous connective tissues that attach muscles to bones. Ligaments connect bones to other bones. Together they support movement and joint stability in the body.
Tendons are tough fibrous connective tissues that attach muscles to bones. Ligaments connect bones to other bones. Together they support movement and joint stability in the body.
3Which is the largest organ in the human body?
Answer: D — Skin
The skin is the largest organ of the human body, covering an area of about 1.5 to 2 square metres in adults. It protects the body from infection, regulates temperature and senses the environment.
The skin is the largest organ of the human body, covering an area of about 1.5 to 2 square metres in adults. It protects the body from infection, regulates temperature and senses the environment.
4Sound cannot travel through:
Answer: C — Vacuum
Sound is a mechanical wave that requires a medium (solid, liquid or gas) to travel. It cannot travel through a vacuum because there are no particles to transmit the vibrations.
Sound is a mechanical wave that requires a medium (solid, liquid or gas) to travel. It cannot travel through a vacuum because there are no particles to transmit the vibrations.
5Which gas do plants absorb during photosynthesis?
Answer: C — Carbon dioxide
Plants absorb carbon dioxide (CO₂) from the air through tiny pores called stomata. Along with water and sunlight, CO₂ is converted into glucose during photosynthesis.
Plants absorb carbon dioxide (CO₂) from the air through tiny pores called stomata. Along with water and sunlight, CO₂ is converted into glucose during photosynthesis.
6What is the boiling point of water in Celsius?
Answer: D — 100°C
Water boils at 100°C (212°F) at standard atmospheric pressure at sea level. At this temperature, water changes state from liquid to gas (water vapour or steam).
Water boils at 100°C (212°F) at standard atmospheric pressure at sea level. At this temperature, water changes state from liquid to gas (water vapour or steam).
7Which force keeps planets in orbit around the Sun?
Answer: C — Gravitational force
Gravity is the force of attraction between masses. The Sun's gravitational pull keeps all planets in their elliptical orbits. Without gravity, planets would move in straight lines into space.
Gravity is the force of attraction between masses. The Sun's gravitational pull keeps all planets in their elliptical orbits. Without gravity, planets would move in straight lines into space.
8The process of water changing from liquid to gas is:
Answer: B — Evaporation
Evaporation is the process by which liquid water changes into water vapour (gas) when heated. It occurs at the surface of a liquid. Condensation is the reverse process — gas changing to liquid.
Evaporation is the process by which liquid water changes into water vapour (gas) when heated. It occurs at the surface of a liquid. Condensation is the reverse process — gas changing to liquid.
9Chlorophyll gives plants which colour?
Answer: D — Green
Chlorophyll is the green pigment found in the chloroplasts of plant cells. It absorbs sunlight (mainly red and blue wavelengths) and reflects green light, giving plants their characteristic green colour.
Chlorophyll is the green pigment found in the chloroplasts of plant cells. It absorbs sunlight (mainly red and blue wavelengths) and reflects green light, giving plants their characteristic green colour.
10Which vitamin helps in clotting of blood?
Answer: C — Vitamin K
Vitamin K is essential for blood clotting (coagulation). It helps produce proteins required for the clotting process. Deficiency of Vitamin K can lead to excessive bleeding and bruising.
Vitamin K is essential for blood clotting (coagulation). It helps produce proteins required for the clotting process. Deficiency of Vitamin K can lead to excessive bleeding and bruising.
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