9th 2019 question paper with answers

Exams are important for learning and development. Here, we provide a collection of questions and answers from the 9th-grade 2019 question paper to help students understand key concepts across various subjects like Mathematics, Science, English, Social Science, and Hindi. This guide will prepare students effectively for their exams.

Mathematics

Question: What is the value of (3x² + 5x – 7) when x = 2?

Answer: The value is 3(2²) + 5(2) – 7 = 12 + 10 – 7 = 15.

Question: Simplify 4x – 3 + 2x + 7.

Answer: The simplified expression is 6x + 4.

Question: Solve for x: 5x + 3 = 18.

Answer: Subtract 3 from both sides, 5x = 15. Divide by 5, x = 3.

Question: What is the area of a triangle with base 8 cm and height 5 cm?

Answer: The area is ½ × 8 × 5 = 20 cm².

Question: Find the value of (a+b)² when a=3 and b=4.

Answer: (3+4)² = 7² = 49.

Question: Convert 0.25 into a fraction.

Answer: 0.25 = ¼.

Question: Solve for x: 3x – 7 = 2x + 5.

Answer: x = 12.

Question: Write the quadratic formula.

Answer: The quadratic formula is x = [-b ± √(b²-4ac)] / 2a.

Question: What is the HCF of 36 and 60?

Answer: The HCF is 12.

Question: Find the mean of 5, 10, 15, 20, and 25.

Answer: Mean = (5+10+15+20+25)/5 = 15.

Question: Factorize x² – 9.

Answer: x² – 9 = (x + 3)(x – 3).

Question: What is the value of sin 30°?

Answer: The value of sin 30° is ½.

Question: If a:b = 3:4 and b:c = 2:5, find a:c.

Answer: a:c = 3:10.

Question: Solve: 2/3 ÷ 4/9.

Answer: The result is 3/2.

Question: Write the formula for the area of a circle.

Answer: The formula is A = πr².

Question: Find the cube of 4.

Answer: The cube of 4 is 64.

Question: Solve: √64 + √81.

Answer: The result is 8 + 9 = 17.

Question: What is the perimeter of a square with side 6 cm?

Answer: The perimeter is 4 × 6 = 24 cm.

Question: Convert 45° into radians.

Answer: 45° = π/4 radians.

Science

Question: Define photosynthesis.

Answer: Photosynthesis is the process by which green plants prepare food using sunlight, carbon dioxide, and water.

Question: What is the chemical formula of water?

Answer: The chemical formula is H₂O.

Question: Name the three states of matter.

Answer: The three states are solid, liquid, and gas.

Question: Define Newton’s first law of motion.

Answer: It states that an object will remain at rest or in uniform motion unless acted upon by an external force.

Question: What is the SI unit of force?

Answer: The SI unit is the Newton (N).

Question: Explain the term ‘acid’.

Answer: Acids are substances that release H⁺ ions in water and have a sour taste.

Question: What is the function of chloroplasts in plants?

Answer: Chloroplasts contain chlorophyll, which helps in photosynthesis.

Question: What is the formula for speed?

Answer: Speed = Distance ÷ Time.

Question: What is the boiling point of water in Celsius?

Answer: The boiling point is 100°C.

Question: What are renewable resources?

Answer: Renewable resources are resources that can be replenished naturally, like solar and wind energy.

Question: Define exothermic reaction.

Answer: Exothermic reactions release heat.

Question: What is the function of the heart?

Answer: The heart pumps blood throughout the body.

Question: Name two components of air.

Answer: Oxygen and nitrogen.

Question: What is DNA?

Answer: DNA is the genetic material in living organisms, carrying hereditary information.

Question: What is Ohm’s law?

Answer: Ohm’s law states that V = IR, where V is voltage, I is current, and R is resistance.

Question: Name one metal and one non-metal.

Answer: Metal: Iron; Non-metal: Sulfur.

Question: What is the pH of neutral water?

Answer: The pH is 7.

Question: Define gravity.

Answer: Gravity is the force that attracts objects towards the center of the Earth.

Question: What is the smallest unit of matter?

Answer: The atom is the smallest unit of matter.

English

Question: Define a noun.

Answer: A noun is a word that names a person, place, thing, or idea.

Question: What is a synonym?

Answer: A synonym is a word with a similar meaning to another word.

Question: What is a pronoun?

Answer: A pronoun is a word that takes the place of a noun.

Question: Write the plural of ‘child’.

Answer: The plural is ‘children’.

Question: What is the past tense of ‘run’?

Answer: The past tense is ‘ran’.

Question: Define an adjective.

Answer: An adjective is a word that describes a noun or pronoun.

Question: What is a conjunction?

Answer: A conjunction is a word that connects words, phrases, or clauses.

Question: Define a verb.

Answer: A verb is a word that shows action or a state of being.

Question: Write a sentence using the word ‘beautiful’.

Answer: The sunset was beautiful.

Question: What is a metaphor?

Answer: A metaphor is a figure of speech that compares two things without using ‘like’ or ‘as’.

Question: Define an adverb.

Answer: An adverb is a word that describes a verb, adjective, or another adverb.

Question: What is a homophone?

Answer: Homophones are words that sound the same but have different meanings or spellings.

Question: What is the meaning of the word ‘benevolent’?

Answer: Benevolent means kind or charitable.

Question: What is the opposite of ‘happy’?

Answer: The opposite is ‘sad’.

Question: Write a sentence using the word ‘quickly’.

Answer: She quickly finished her homework.

Question: What is an exclamatory sentence?

Answer: An exclamatory sentence expresses strong emotion and ends with an exclamation mark.

Question: Define an interjection.

Answer: An interjection is a word that expresses sudden emotion, like ‘Wow!’ or ‘Oh!’.

Question: What is the difference between ‘their’ and ‘there’?

Answer: ‘Their’ is possessive, while ‘there’ refers to a place.

Question: Write a sentence using the word ‘friendly’.

Answer: The dog was very friendly to strangers.

Studying previous year question papers improves understanding and preparation for exams. The 9th-grade 2019 question paper questions and answers across subjects provide a solid foundation for students to excel in academics and develop confidence in their studies.