Dr. Homi Bhabha Exam sample question paper for Class 9 with our comprehensive set 2 is designed specifically for students following the Maharashtra State Board curriculum, aligning perfectly with the textbooks for 7th, 8th, and 9th standards. This sample question paper is designed to challenge students with in-depth, analytical questions from Maharashtra State Board, CBSE, ICSE, and IB textbooks, covering fundamental science concepts at a high difficulty level.
With questions set at a medium difficulty level, students can effectively enhance their understanding and confidence. Each question aims to challenge students while reinforcing their knowledge, making this resource invaluable preparing for DHBBVS.
What is the primary function of chlorophyll in plants?
a) Absorption of water
b) Absorption of sunlight
c) Transport of nutrients
d) Respiration
Answer: b) Absorption of sunlight
Explanation: Chlorophyll absorbs sunlight, which is necessary for photosynthesis in plants.Which nutrient is mainly responsible for the growth and repair of body tissues?
a) Carbohydrates
b) Proteins
c) Fats
d) Vitamins
Answer: b) Proteins
Explanation: Proteins are the building blocks of body tissues and are essential for growth and repair.What is the main cause of acid rain?
a) Carbon dioxide
b) Nitrogen gas
c) Sulfur dioxide
d) Oxygen
Answer: c) Sulfur dioxide
Explanation: Sulfur dioxide combines with water in the atmosphere to form sulfuric acid, causing acid rain.What process is used to separate a mixture of iron filings and sand?
a) Filtration
b) Magnetic separation
c) Distillation
d) Sedimentation
Answer: b) Magnetic separation
Explanation: Iron is magnetic, so a magnet can separate it from sand, which is non-magnetic.
Which part of the cell controls its activities?
a) Cytoplasm
b) Nucleus
c) Cell wall
d) Mitochondria
Answer: b) Nucleus
Explanation: The nucleus contains the cell’s genetic material and controls all cellular activities.Which type of change is rusting of iron?
a) Physical change
b) Chemical change
c) Reversible change
d) Temporary change
Answer: b) Chemical change
Explanation: Rusting involves a chemical reaction between iron, oxygen, and moisture, forming a new substance, iron oxide.Which gas is produced during photosynthesis?
a) Nitrogen
b) Oxygen
c) Carbon dioxide
d) Methane
Answer: b) Oxygen
Explanation: During photosynthesis, plants convert carbon dioxide and water into oxygen and glucose.Which property of liquids allows them to take the shape of their container?
a) Density
b) Fluidity
c) Rigidity
d) Viscosity
Answer: b) Fluidity
Explanation: Fluidity allows liquids to flow and take the shape of their container.What is the chemical formula for water?
a) CO₂
b) HCl
c) H₂O
d) NH₃
Answer: c) H₂O
Explanation: Water is made up of two hydrogen atoms and one oxygen atom, represented as H₂O.Which part of the human brain controls balance and coordination?
a) Cerebrum
b) Cerebellum
c) Medulla
d) Thalamus
Answer: b) Cerebellum
Explanation: The cerebellum is responsible for balance, posture, and coordination of movements.What kind of acid is found in vinegar?
a) Citric acid
b) Sulfuric acid
c) Acetic acid
d) Hydrochloric acid
Answer: c) Acetic acid
Explanation: Vinegar primarily contains acetic acid, which gives it its sour taste.In which organ does digestion begin?
a) Stomach
b) Small intestine
c) Mouth
d) Esophagus
Answer: c) Mouth
Explanation: Digestion begins in the mouth, where food is broken down by chewing and saliva.
Which organelle is known as the “powerhouse of the cell”?
a) Nucleus
b) Ribosome
c) Mitochondria
d) Chloroplast
Answer: c) Mitochondria
Explanation: Mitochondria generate energy for the cell through cellular respiration.What is the primary component of the cell membrane?
a) Nucleic acids
b) Carbohydrates
c) Lipids
d) Proteins
Answer: c) Lipids
Explanation: The cell membrane is mainly composed of a lipid bilayer, providing flexibility and protection.What is the SI unit of electric current?
a) Volt
b) Ampere
c) Ohm
d) Watt
Answer: b) Ampere
Explanation: The SI unit of electric current is the ampere (A).Which gas is used in fire extinguishers?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: c) Carbon dioxide
Explanation: Carbon dioxide displaces oxygen, helping to extinguish the fire.Which planet is known as the “Red Planet”?
a) Mars
b) Venus
c) Jupiter
d) Saturn
Answer: a) Mars
Explanation: Mars is called the Red Planet due to its reddish appearance from iron oxide.What is the chemical formula of glucose?
a) C₆H₁₂O₆
b) CH₄
c) CO₂
d) NH₃
Answer: a) C₆H₁₂O₆
Explanation: Glucose has the chemical formula C₆H₁₂O₆ and is a simple sugar.What is the unit of frequency?
a) Joule
b) Watt
c) Hertz
d) Tesla
Answer: c) Hertz
Explanation: The hertz (Hz) is the SI unit for frequency, representing cycles per second.Which blood component is responsible for clotting?
a) Red blood cells
b) White blood cells
c) Platelets
d) Plasma
Answer: c) Platelets
Explanation: Platelets help in clot formation to stop bleeding.Which is the hardest natural substance known?
a) Gold
b) Iron
c) Diamond
d) Quartz
Answer: c) Diamond
Explanation: Diamond is the hardest known natural material due to its strong covalent bonding.Which element is found in all organic compounds?
a) Carbon
b) Oxygen
c) Nitrogen
d) Hydrogen
Answer: a) Carbon
Explanation: Carbon forms the backbone of all organic molecules.What kind of lens is used in a magnifying glass?
a) Concave
b) Convex
c) Cylindrical
d) Plano-concave
Answer: b) Convex
Explanation: A convex lens converges light rays, magnifying the object viewed.Which type of reaction releases energy in the form of heat?
a) Exothermic
b) Endothermic
c) Neutralization
d) Displacement
Answer: a) Exothermic
Explanation: Exothermic reactions release energy, usually in the form of heat.What is the boiling point of water at sea level?
a) 50°C
b) 100°C
c) 150°C
d) 200°C
Answer: b) 100°C
Explanation: Water boils at 100°C under standard atmospheric pressure.What is Newton’s first law of motion also known as?
a) Law of reaction
b) Law of inertia
c) Law of gravitation
d) Law of force
Answer: b) Law of inertia
Explanation: Newton’s first law states that an object will remain at rest or in uniform motion unless acted upon by an external force.What is the formula for calculating pressure?
a) Force × Area
b) Force ÷ Area
c) Mass × Acceleration
d) Distance ÷ Time
Answer: b) Force ÷ Area
Explanation: Pressure is defined as force applied per unit area.What type of wave is sound?
a) Transverse
b) Longitudinal
c) Electromagnetic
d) Surface
Answer: b) Longitudinal
Explanation: Sound waves are longitudinal waves, where the particle displacement is parallel to the direction of wave propagation.Which device is used to measure atmospheric pressure?
a) Thermometer
b) Barometer
c) Anemometer
d) Hygrometer
Answer: b) Barometer
Explanation: A barometer measures atmospheric pressure.What is the chemical reaction of photosynthesis?
a) Carbon dioxide + Water → Glucose + Oxygen
b) Carbon dioxide + Water → Glucose + Oxygen
c) Oxygen + Glucose → Carbon dioxide + Water
d) Glucose + Oxygen → Carbon dioxide + Water
Answer: b) Carbon dioxide + Water → Glucose + Oxygen
Explanation: Photosynthesis converts carbon dioxide and water into glucose and oxygen using sunlight.What type of energy does a stretched rubber band possess?
a) Potential energy
b) Kinetic energy
c) Thermal energy
d) Chemical energy
Answer: a) Potential energy
Explanation: A stretched rubber band stores potential energy due to its position.Which is the main component of natural gas?
a) Ethylene
b) Methane
c) Propane
d) Butane
Answer: b) Methane
Explanation: Natural gas primarily consists of methane (CH₄).What is the pH range of neutral solutions?
a) 0-7
b) 7-14
c) 7
d) 4-10
Answer: c) 7
Explanation: A neutral solution has a pH of 7.What force keeps the planets in orbit around the sun?
a) Friction
b) Gravitational force
c) Electromagnetic force
d) Centripetal force
Answer: b) Gravitational force
Explanation: The gravitational force between the sun and planets keeps them in orbit.Which part of the eye is responsible for focusing light?
a) Retina
b) Lens
c) Cornea
d) Iris
Answer: b) Lens
Explanation: The lens of the eye focuses light onto the retina.What is the most abundant gas in the Earth’s atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: b) Nitrogen
Explanation: Nitrogen makes up about 78% of the Earth’s atmosphere.What is the main source of energy for the Earth?
a) Geothermal energy
b) Nuclear energy
c) Solar energy
d) Wind energy
Answer: c) Solar energy
Explanation: Solar energy from the sun is the primary source of energy for the Earth.Which of the following is a renewable resource?
a) Coal
b) Oil
c) Solar energy
d) Natural gas
Answer: c) Solar energy
Explanation: Solar energy is renewable and can be harnessed repeatedly.What is the main function of the roots of a plant?
a) Photosynthesis
b) Absorption of water and nutrients
c) Reproduction
d) Storage of food
Answer: b) Absorption of water and nutrients
Explanation: Roots absorb water and essential nutrients from the soil.What type of cell division produces gametes?
a) Mitosis
b) Meiosis
c) Binary fission
d) Budding
Answer: b) Meiosis
Explanation: Meiosis is the type of cell division
Who developed the theory of relativity?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) Nikola Tesla
Answer: a) Albert Einstein
Explanation: Albert Einstein formulated the theory of relativity, changing our understanding of space and time.What is the largest organ in the human body?
a) Heart
b) Brain
c) Skin
d) Liver
Answer: c) Skin
Explanation: Skin is the body’s largest organ, providing protection and regulating temperature.Which planet has the strongest gravitational pull?
a) Mars
b) Earth
c) Venus
d) Jupiter
Answer: d) Jupiter
Explanation: Jupiter has the most substantial gravitational force due to its massive size.What is the most common gas in the Earth’s atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: b) Nitrogen
Explanation: Nitrogen makes up about 78% of the Earth’s atmosphere.
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