Dr. Homi Bhabha Exam sample question paper for Class 9 with our comprehensive set 3 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 process by which plants make their food?
a) Respiration
b) Photosynthesis
c) Fermentation
d) Digestion
Answer: b) Photosynthesis
Explanation: Photosynthesis is the process through which plants convert sunlight, carbon dioxide, and water into glucose and oxygen.Which of the following is not a renewable source of energy?
a) Solar energy
b) Wind energy
c) Coal
d) Hydropower
Answer: c) Coal
Explanation: Coal is a fossil fuel and a non-renewable source of energy, unlike solar and wind energy, which are renewable.What is the primary function of the roots in plants?
a) Photosynthesis
b) Absorption of water and minerals
c) Storage of food
d) Reproduction
Answer: b) Absorption of water and minerals
Explanation: Roots anchor the plant and absorb water and nutrients from the soil.Which part of the cell contains genetic material?
a) Cytoplasm
b) Nucleus
c) Cell membrane
d) Ribosome
Answer: b) Nucleus
Explanation: The nucleus houses the cell’s genetic material (DNA), controlling cell functions and reproduction.
Which gas is most abundant in the Earth’s atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon Dioxide
d) Argon
Answer: b) Nitrogen
Explanation: Nitrogen makes up about 78% of the Earth’s atmosphere, making it the most abundant gas.What is the basic unit of life?
a) Tissue
b) Organ
c) Cell
d) Organism
Answer: c) Cell
Explanation: The cell is the smallest structural and functional unit of life.Which of the following is a non-renewable resource?
a) Natural gas
b) Solar energy
c) Wind energy
d) Geothermal energy
Answer: a) Natural gas
Explanation: Natural gas is a fossil fuel and is considered a non-renewable resource.What is the function of the digestive system?
a) Circulation of blood
b) Breaking down food
c) Respiration
d) Excretion
Answer: b) Breaking down food
Explanation: The digestive system breaks down food into smaller molecules for absorption.Which type of simple machine is a lever?
a) Wheel and axle
b) Inclined plane
c) Pulley
d) Wedge
Answer: a) Lever
Explanation: A lever is a simple machine that consists of a beam or rod pivoted at a fixed hinge, or fulcrum.Which organ in the human body is primarily responsible for filtering blood?
a) Heart
b) Kidney
c) Liver
d) Lungs
Answer: b) Kidney
Explanation: The kidneys filter blood to remove waste and excess substances, producing urine.What type of wave is sound?
a) Electromagnetic
b) Longitudinal
c) Transverse
d) Surface
Answer: b) Longitudinal
Explanation: Sound waves are longitudinal waves where particles of the medium move parallel to the direction of wave propagation.What is the main component of air?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Argon
Answer: b) Nitrogen
Explanation: Nitrogen is the primary gas in the atmosphere, accounting for about 78%.
Which of the following is a vector quantity?
a) Mass
b) Velocity
c) Temperature
d) Time
Answer: b) Velocity
Explanation: Velocity is a vector quantity that has both magnitude and direction.What is the chemical formula for water?
a) H₂O₂
b) CO₂
c) H₂O
d) O₂
Answer: c) H₂O
Explanation: Water is composed of two hydrogen atoms and one oxygen atom, represented by the formula H₂O.What type of bond is formed when electrons are shared?
a) Ionic bond
b) Covalent bond
c) Metallic bond
d) Hydrogen bond
Answer: b) Covalent bond
Explanation: A covalent bond is formed when two atoms share electrons.What is the process of converting a solid directly into a gas called?
a) Melting
b) Condensation
c) Sublimation
d) Evaporation
Answer: c) Sublimation
Explanation: Sublimation is the process where a solid turns directly into a gas without becoming liquid.Which gas is produced during photosynthesis?
a) Oxygen
b) Carbon Dioxide
c) Nitrogen
d) Hydrogen
Answer: a) Oxygen
Explanation: Oxygen is produced as a byproduct of photosynthesis in plants.What is the function of chloroplasts in plant cells?
a) Energy production
b) Photosynthesis
c) Respiration
d) Protein synthesis
Answer: b) Photosynthesis
Explanation: Chloroplasts contain chlorophyll and are responsible for converting sunlight into energy through photosynthesis.What is the law of conservation of mass?
a) Mass can be created
b) Mass cannot be created or destroyed
c) Mass is always lost
d) Mass is always gained
Answer: b) Mass cannot be created or destroyed
Explanation: The law states that in a chemical reaction, the total mass of reactants equals the total mass of products.Which part of the brain controls balance and coordination?
a) Cerebrum
b) Cerebellum
c) Brainstem
d) Medulla
Answer: b) Cerebellum
Explanation: The cerebellum is responsible for balance and coordination of voluntary movements.What type of reaction occurs when an acid reacts with a base?
a) Neutralization
b) Combustion
c) Synthesis
d) Decomposition
Answer: a) Neutralization
Explanation: A neutralization reaction occurs when an acid and a base react to form water and salt.Which of the following is not a function of the liver?
a) Detoxification
b) Bile production
c) Oxygen transport
d) Metabolism
Answer: c) Oxygen transport
Explanation: The liver does not transport oxygen; that function is performed by red blood cells.What is the boiling point of water at sea level?
a) 50°C
b) 100°C
c) 200°C
d) 150°C
Answer: b) 100°C
Explanation: Water boils at 100°C under standard atmospheric pressure at sea level.Which of the following is a primary consumer in an ecosystem?
a) Grass
b) Herbivore
c) Carnivore
d) Omnivore
Answer: b) Herbivore
Explanation: Primary consumers are herbivores that eat plants.What is the main function of red blood cells?
a) Transport oxygen
b) Fight infection
c) Clot blood
d) Regulate temperature
Answer: a) Transport oxygen
Explanation: Red blood cells carry oxygen from the lungs to the body’s tissues.What is the phenomenon of light bending called?
a) Reflection
b) Diffraction
c) Refraction
d) Absorption
Answer: c) Refraction
Explanation: Refraction is the bending of light as it passes from one medium to another.What is the primary function of the immune system?
a) Fight infections
b) Regulate body temperature
c) Digest food
d) Circulate blood
Answer: a) Fight infections
Explanation: The immune system protects the body against pathogens and foreign invaders.What type of energy is stored in food?
a) Kinetic energy
b) Chemical energy
c) Potential energy
d) Thermal energy
Answer: b) Chemical energy
Explanation: Food contains chemical energy that is released during metabolism.What is the most abundant element in the universe?
a) Oxygen
b) Hydrogen
c) Carbon
d) Helium
Answer: b) Hydrogen
Explanation: Hydrogen is the simplest and most abundant element in the universe.Which part of a plant is responsible for photosynthesis?
a) Roots
b) Stem
c) Leaves
d) Flowers
Answer: c) Leaves
Explanation: Leaves contain chlorophyll and are the primary site for photosynthesis.What type of bond holds the atoms in a molecule of water together?
a) Ionic bond
b) Covalent bond
c) Hydrogen bond
d) Metallic bond
Answer: b) Covalent bond
Explanation: Water molecules are held together by covalent bonds formed between oxygen and hydrogen atoms.What is the chemical symbol for gold?
a) Au
b) Ag
c) Au
d) Fe
Answer: c) Au
Explanation: The chemical symbol for gold is Au, derived from the Latin name ‘aurum.’What is the primary source of energy for the Earth?
a) Wind
b) Sun
c) Water
d) Geothermal
Answer: b) Sun
Explanation: The Sun is the primary source of energy for the Earth, driving climate and weather.Which of the following structures is found in prokaryotic cells?
a) Mitochondria
b) Ribosomes
c) Nucleus
d) Endoplasmic reticulum
Answer: b) Ribosomes
Explanation: Prokaryotic cells lack a nucleus but contain ribosomes for protein synthesis.What is the main function of the respiratory system?
a) Gas exchange
b) Nutrient absorption
c) Blood circulation
d) Waste removal
Answer: a) Gas exchange
Explanation: The respiratory system facilitates the exchange of oxygen and carbon dioxide in the body.Which of the following is not a characteristic of living things?
a) Growth
b) Reproduction
c) Inability to adapt
d) Metabolism
Answer: c) Inability to adapt
Explanation: All living organisms can adapt to their environment, which is a key characteristic of life.
What is the largest planet in our solar system?
a) Earth
b) Jupiter
c) Saturn
d) Mars
Answer: b) Jupiter
Explanation: Jupiter is the largest planet in our solar system, known for its Great Red Spot and many moons.Who proposed the theory of evolution by natural selection?
a) Charles Darwin
b) Gregor Mendel
c) Albert Einstein
d) Isaac Newton
Answer: a) Charles Darwin
Explanation: Charles Darwin is known for his theory of evolution by natural selection, published in “On the Origin of Species.”What is the most abundant gas in the Earth’s atmosphere?
a) Nitrogen
b) Oxygen
c) Carbon Dioxide
d) Argon
Answer: a) Nitrogen
Explanation: Nitrogen makes up about 78% of the Earth’s atmosphere, making it the most abundant gas.Which scientist is known for the laws of motion?
a) Isaac Newton
b) Albert Einstein
c) Niels Bohr
d) Galileo Galilei
Answer: a) Isaac Newton
Explanation: Isaac Newton formulated the three laws of motion, laying the foundation for classical mechanics.
If you find this useful, share it with your friends… so they can join you in preparing for Dr. Homi Bhabha Balvaidnyanik Competition or DHBBVS. Together, you can tackle these questions, discuss the answers, and strengthen your knowledge base.
Start reading, keep preparing and stay focused! Let’s achieve greatness together!
