The 9th standard exams are an important step in a student’s academic journey. This guide covers various subjects and their respective question papers from the 2018 exams. It offers a collection of questions and answers across subjects like Mathematics, Science, Social Science, and English to help students prepare effectively.
9 Standard Question Paper and Answer for The year 2018
Mathematics
Question: What is the formula for the area of a circle?
Answer: The formula for the area of a circle is A = πr², where r is the radius.
Question: Solve the equation: 2x + 5 = 11.
Answer: Subtract 5 from both sides: 2x = 6, then divide by 2: x = 3.
Question: What is the value of sin 30°?
Answer: The value of sin 30° is 1/2.
Question: Find the square root of 144.
Answer: The square root of 144 is 12.
Question: What is a prime number?
Answer: A prime number is a number that has only two factors: 1 and itself.
Question: Solve: 3x – 7 = 2x + 5.
Answer: Subtract 2x from both sides: x – 7 = 5, then add 7: x = 12.
Question: What is the slope of a line with equation y = 3x + 4?
Answer: The slope of the line is 3.
Question: What is the Pythagorean theorem?
Answer: The Pythagorean theorem states that in a right triangle, a² + b² = c².
Question: Find the perimeter of a rectangle with length 5 cm and width 3 cm.
Answer: The perimeter is 2(l + w) = 2(5 + 3) = 16 cm.
Question: Solve for x: 4x = 20.
Answer: Divide both sides by 4: x = 5.
Question: Convert 0.75 into a fraction.
Answer: 0.75 as a fraction is 3/4.
Question: What is the sum of the angles in a triangle?
Answer: The sum of the angles in a triangle is 180°.
Question: What is the least common multiple of 4 and 6?
Answer: The least common multiple of 4 and 6 is 12.
Question: Simplify: 5(2x + 3) = 10x + 15.
Answer: Multiply 5 by each term inside the parentheses: 10x + 15 = 10x + 15.
Question: Find the area of a triangle with base 8 cm and height 5 cm.
Answer: The area is (1/2) × base × height = (1/2) × 8 × 5 = 20 cm².
Question: What is the formula for the circumference of a circle?
Answer: The formula for the circumference is C = 2πr.
Question: What is the value of cos 60°?
Answer: The value of cos 60° is 1/2.
Question: Solve for y: 3y + 7 = 16.
Answer: Subtract 7 from both sides: 3y = 9, then divide by 3: y = 3.
Question: Find the cube root of 27.
Answer: The cube root of 27 is 3.
Question: Convert 45% into a fraction.
Answer: 45% as a fraction is 9/20.
Science
Question: What is photosynthesis?
Answer: Photosynthesis is the process by which green plants use sunlight to synthesize food from carbon dioxide and water.
Question: What is the chemical formula of water?
Answer: The chemical formula of water is H₂O.
Question: Name the three states of matter.
Answer: The three states of matter are solid, liquid, and gas.
Question: What is the unit of force in the SI system?
Answer: The unit of force in the SI system is the newton (N).
Question: Define inertia.
Answer: Inertia is the tendency of an object to resist changes in its state of motion.
Question: What is the speed of light in a vacuum?
Answer: The speed of light in a vacuum is approximately 3 × 10⁸ meters per second.
Question: What is Newton’s first law of motion?
Answer: Newton’s first law states that an object will remain at rest or in uniform motion unless acted upon by a force.
Question: What is an atom?
Answer: An atom is the smallest unit of matter that retains the properties of an element.
Question: What is the pH scale?
Answer: The pH scale measures the acidity or alkalinity of a solution, ranging from 0 to 14.
Question: What is the main gas responsible for the greenhouse effect?
Answer: The main gas responsible for the greenhouse effect is carbon dioxide (CO₂).
Question: Define kinetic energy.
Answer: Kinetic energy is the energy an object possesses due to its motion.
Question: What is the law of conservation of energy?
Answer: The law of conservation of energy states that energy cannot be created or destroyed, only transformed.
Question: What is the boiling point of water?
Answer: The boiling point of water is 100°C at standard atmospheric pressure.
Question: What is an ecosystem?
Answer: An ecosystem is a community of living organisms interacting with their physical environment.
Question: What is the formula for calculating density?
Answer: The formula for density is mass divided by volume (density = mass/volume).
Question: What is a chemical reaction?
Answer: A chemical reaction is a process in which substances change into different substances with different properties.
Question: Name the force that pulls objects toward the center of the Earth.
Answer: The force that pulls objects toward the center of the Earth is gravity.
Question: What is an element?
Answer: An element is a substance that cannot be broken down into simpler substances by chemical means.
Question: What is the difference between mass and weight?
Answer: Mass is the amount of matter in an object, while weight is the force exerted by gravity on that object.
Question: What is evaporation?
Answer: Evaporation is the process by which a liquid turns into a gas at a temperature below its boiling point.
Social Science
Question: What is the capital of India?
Answer: The capital of India is New Delhi.
Question: Who was the first Prime Minister of India?
Answer: The first Prime Minister of India was Jawaharlal Nehru.
Question: What is democracy?
Answer: Democracy is a form of government in which power is vested in the hands of the people, either directly or through elected representatives.
Question: What is the Constitution of India?
Answer: The Constitution of India is the supreme law of India, laying down the framework for the political principles, structures, and duties of government institutions.
Question: When did India gain independence?
Answer: India gained independence on August 15, 1947.
Question: Who is known as the Father of the Nation in India?
Answer: Mahatma Gandhi is known as the Father of the Nation in India.
Question: What is the official language of India?
Answer: The official language of India is Hindi, and English is used for official purposes as well.
Question: What is a federal system?
Answer: A federal system is a form of government where power is divided between a central authority and various regional units.
Question: What is globalization?
Answer: Globalization is the process of increased interconnectedness and interdependence among countries, particularly in terms of trade, culture, and communication.
Question: Who discovered America?
Answer: Christopher Columbus is credited with discovering America in 1492.
Question: What was the Industrial Revolution?
Answer: The Industrial Revolution was a period of rapid industrial growth and technological advancements that began in the late 18th century.
Question: What is a monarchy?
Answer: A monarchy is a form of government in which a king or queen rules, and the position is usually inherited.
Question: What is the United Nations?
Answer: The United Nations is an international organization founded in 1945 to promote peace, security, and cooperation among nations.
Question: What is the Green Revolution?
Answer: The Green Revolution refers to the increase in agricultural production due to the introduction of high-yielding varieties of seeds and modern farming techniques.
Question: What is the difference between a developed and developing country?
Answer: A developed country has a high standard of living, industrialization, and economic stability, while a developing country is still improving its economy and living conditions.
Question: Who wrote the Indian national anthem?
Answer: The Indian national anthem, “Jana Gana Mana,” was written by Rabindranath Tagore.
Question: What is a republic?
Answer: A republic is a form of government where the head of state is elected, and the government is based on the rule of law.
Question: What is a revolution?
Answer: A revolution is a significant and often violent change in political power or organizational structures.
Question: What is GDP?
Answer: GDP, or Gross Domestic Product, is the total value of goods and services produced within a country during a specific time period.
Question: What is colonialism?
Answer: Colonialism is the practice of acquiring and maintaining colonies or territories by a foreign power.
English
Question: What is a synonym for the word “happy”?
Answer: A synonym for “happy” is “joyful.”
Question: What is the past tense of the verb “go”?
Answer: The past tense of “go” is “went.”
Question: Define a noun.
Answer: A noun is a word that names a person, place, thing, or idea.
Question: What is a pronoun?
Answer: A pronoun is a word that takes the place of a noun, such as “
