Class Syllabus
Grade 8 — Maths & Science Complete NCERT-aligned chapter list for Grade 8. Every chapter has sample questions to preview. All questions are aligned with CBSE, ICSE, IB and State Board curricula. Sign up free to practise the full bank.
6,274 practice questions 34 chapters Free trial
1 Comparing Quantities173 Qs → Sample questions
If the price of a shirt increased from $50 to $60, what is the percentage increase?
(A) 10% (B) 15% (C) 20% (D) 25% easy A quantity decreases from 80 to 60. What is the percentage decrease?
(A) 25% (B) 20% (C) 15% (D) 30% easy If the quantity of apples grows from 200 kg to 250 kg, what is the percentage growth?
(A) 20% (B) 25% (C) 30% (D) 22.5% easy 2 Linear Equations in One Variable172 Qs → 3 Data Handling171 Qs → Sample questions
If the mode of the data set is 7, which means?
(A) Most frequent value (B) Average value (C) Middle value (D) Sum of values easy What is the median of the data set: 8, 3, 7, 5, 10?
easy What is the mean of the data set: 2, 4, 6, 8, 10?
easy 4 Cubes and Cube Roots171 Qs → 5 Algebraic Expressions and Identities171 Qs → Sample questions
What is the factorization of $a^{2} - b^{2}$?
(A) \((a - b)^2\) (B) \((a + b)^2\) (C) \((a - b)(a + b)\) (D) $a^{2} + b^{2}$ easy Expand \((2x + 5)^2\).
(A) $4x^{2} + 20x + 25$ (B) $4x^{2} + 25$ (C) $4x^{2} - 20x + 25$ (D) $2x^{2} + 10x + 25$ easy Which is the factorized form of $x^{2} + 2x + 1$?
(A) \((x + 1)^2\) (B) \((x - 1)^2\) (C) \((x + 1)(x - 1)\) (D) \(x(x + 2) + 1\) easy 6 Exponents and Powers170 Qs → 7 Direct and Inverse Proportions170 Qs → Sample questions
If \( y \) is directly proportional to \( x \) and \( y = 10 \) when \( x = 2 \), find \( y \) when \( x = 5 \).
easy If \( y \) is directly proportional to \( x \) and \( y = 15 \) when \( x = 3 \), find the constant of proportionality.
easy If \( y \) is directly proportional to \( x \), which of the following is true?
(A) \( \frac{y_1}{x_1} = \frac{y_2}{x_2} \) (B) \( y_1 x_1 = y_2 x_2 \) (C) \( y_1 + x_1 = y_2 + x_2 \) (D) \( y_1 - x_1 = y_2 - x_2 \) easy 8 Squares and Square Roots170 Qs → 9 Mensuration169 Qs → Sample questions
Find the perimeter of a square whose side is 7 cm.
(A) 28 cm (B) 21 cm (C) 14 cm (D) 49 cm easy The radius of a circle is 3 cm. What is its area? (Use \( \pi = 3.14 \))
(A) $28.26 \text{ cm}^{2}$ (B) $18.84 \text{ cm}^{2}$ (C) $9.42 \text{ cm}^{2}$ (D) $31.4$ cm$^{2}$ easy Find the volume of a cuboid with length 5 cm, width 3 cm and height 4 cm.
(A) $60 \text{ cm}^{3}$ (B) 12 cm^{3} (C) $20\,\text{cm}^{3}$ (D) 24 cm^{3} easy 10 Rational Numbers169 Qs → Sample questions
What is the sum of \(\frac{1}{2}\) and \(\frac{1}{3}\)?
(A) \(\frac{2}{5}\) (B) \(\frac{5}{6}\) (C) \(\frac{3}{6}\) (D) \(\frac{1}{6}\) easy Which of the following is NOT a rational number?
(A) \(0.75\) (B) \(\frac{7}{8}\) (C) \(0.333...\) (D) \(\sqrt{3}\) easy Convert \(0.2\) into a rational number.
(A) \(\frac{2}{10}\) (B) \(\frac{1}{5}\) (C) \(\frac{2}{100}\) (D) \(\frac{2}{5}\) easy 11 Understanding Quadrilaterals169 Qs → Sample questions
What is the sum of all interior angles of a quadrilateral?
(A) $360^\circ$ (B) $180^\circ$ (C) $270^\circ$ (D) $90^\circ$ easy A rectangle has length 8 cm and width 5 cm. What is its perimeter?
(A) 26 cm (B) 40 cm (C) 36 cm (D) 16 cm easy Which quadrilateral has all sides equal and all angles equal?
(A) Square (B) Rectangle (C) Parallelogram (D) Trapezium easy 12 Playing with Numbers168 Qs → Sample questions
If a number leaves a remainder of 2 when divided by 3, which of the following can be the number?
easy The product of two numbers is 36 and their HCF is 6. What is the LCM?
easy If the digits of a two-digit number are reversed, the number will increase by 27. The number is:
easy 13 Visualizing Solid Shapes168 Qs → 14 Factorisation162 Qs → Sample questions
Factorise: $4x^2 - 25$.
(A) $(2x - 5)(2x + 5)$ (B) $(4x - 25)(x + 1)$ (C) $(4x + 5)(x - 5)$ (D) $(2x - 25)(2x + 1)$ easy Factorise: $9x^2 - 16$.
(A) $(3x - 4)(3x + 4)$ (B) $(9x - 16)(x + 1)$ (C) $(3x - 16)(3x + 1)$ (D) $(9x + 4)(x - 4)$ easy Factorise: $x^2 - 1$.
(A) $(x - 1)(x + 1)$ (B) $(x - 1)^2$ (C) $(x + 1)^2$ (D) $(x - 2)(x + 2)$ easy 15 Introduction to Graphs150 Qs → Sample questions
What is the name of the two perpendicular number lines used to plot points in a plane?
(A) Circle and Radius (B) X-axis and Y-axis (C) Radius and Diameter (D) Chord and Arc easy In the coordinate plane, what does the ordered pair $(3, 4)$ represent?
(A) 3 units up, 4 units right (B) 3 units right, 4 units up (C) 4 units left, 3 units down (D) 4 units right, 3 units down easy What is the point called where X-axis and Y-axis meet?
(A) Vertex (B) Center (C) Origin (D) Midpoint easy 16 Practical Geometry22 Qs → Sample questions
Sum of all interior angles of a polygon with $(n)$ sides is given by
(A) $(n-2) \times 180^\circ$ (B) $n-2 \times 180^\circ$ (C) $(n + 2) \times 180^\circ$ (D) $(n + 2) \times 180^\circ$ easy Polygons that have no portions of their diagonals in their exteriors are called
(A) triangles (B) convex (C) concave (D) squares easy What is the number of sides in Hexagon?
easy 1 Crop Production and Management230 Qs → Sample questions
Which of the following is a Kharif crop?
(A) Wheat (B) Rice (C) Barley (D) Gram easy What process is used to prepare the soil before sowing seeds?
(A) Ploughing (B) Harvesting (C) Irrigation (D) Weeding easy Which of these is an example of a Rabi crop?
(A) Maize (B) Cotton (C) Wheat (D) Sugarcane easy 2 Synthetic Fibres and Plastics218 Qs → Sample questions
Plastics are generally made from:
(A) Natural fibres (B) Polymers (C) Metals (D) Ceramics easy Synthetic fibres are made from:
(A) Plants (B) Animals (C) Petroleum products (D) Minerals easy Which plastic is known for being flexible and is used for making pipes and raincoats?
(A) PVC (B) Polystyrene (C) Polypropylene (D) Bakélite easy 3 Reproduction in Animals218 Qs → Sample questions
Which of the following animals reproduce by laying eggs?
(A) Dog (B) Frog (C) Cow (D) Human easy In sexual reproduction, the male produces __________.
(A) Eggs (B) Seeds (C) Sperm (D) Spores easy Which of these is an example of viviparous reproduction?
(A) Frog (B) Lizard (C) Human (D) Fish easy 4 Materials: Metals and Non-Metals218 Qs → Sample questions
Which of the following is a property of metals?
(A) Poor conductors of heat (B) Malleable and ductile (C) Brittle and non-malleable (D) Non-conductors of electricity easy Which material is a non-metal?
(A) Copper (B) Aluminum (C) Sulfur (D) Iron easy What is the correct term for a metal’s ability to conduct electricity?
(A) Malleability (B) Conductivity (C) Ductility (D) Lustre easy 5 Stars and the Solar System217 Qs → 6 Some Natural Phenomena217 Qs → Sample questions
Which scale is used to measure the magnitude of an earthquake?
(A) Beaufort scale (B) Richter scale (C) Fujita scale (D) Saffir-Simpson scale easy What is a cyclone?
(A) A type of earthquake (B) A rotating storm with strong winds (C) A volcanic eruption (D) A flood caused by heavy rain easy Which natural phenomenon results in rapid shaking and releasing of energy inside the Earth's crust?
(A) Landslide (B) Earthquake (C) Volcanic eruption (D) Drought easy 7 Coal and Petroleum217 Qs → Sample questions
Which gas is released in large amounts when coal is burned?
(A) Oxygen (B) Nitrogen (C) Carbon dioxide (D) Hydrogen easy Petroleum is extracted from the earth using which method?
(A) Mining (B) Drilling (C) Harvesting (D) Filtering easy Which is the correct order of formation for coal types from lowest to highest carbon content?
(A) Anthracite → Lignite → Bituminous (B) Lignite → Bituminous → Anthracite (C) Bituminous → Lignite → Anthracite (D) Lignite → Anthracite → Bituminous easy 8 Combustion and Flame217 Qs → Sample questions
What type of reaction is combustion?
(A) Exothermic (B) Endothermic (C) Photochemical (D) Neutralization easy The formula for methane is CH₄. What are the products of methane's complete combustion?
(A) CO₂ and H₂O (B) CO and H₂ (C) CH₃OH and O₂ (D) CO₂ and H₂ easy What is the main reason for incomplete combustion?
(A) Lack of oxygen (B) Excess oxygen (C) Low fuel supply (D) High temperature easy 9 Cell - Structure and Functions217 Qs → Sample questions
Which part of the cell controls all the activities of the cell?
(A) Cell wall (B) Nucleus (C) Cytoplasm (D) Chloroplast easy What is the jelly-like substance inside a cell called?
(A) Cytoplasm (B) Cell membrane (C) Vacuole (D) Ribosome easy Which organelle is responsible for photosynthesis in plant cells?
(A) Mitochondria (B) Chloroplast (C) Ribosome (D) Lysosome easy 10 Force and Pressure216 Qs → Sample questions
If a force of 10 N is applied on a mass of 2 kg, what is the acceleration?
(A) 5 m/s^{2} (B) $20 \text{ m/s}^{2}$ (C) 0.2 m/s^{2} (D) $12 \text{ m/s}^{2}$ easy What is the unit of pressure?
(A) Pascal (Pa) (B) Newton (N) (C) Kilogram (kg) (D) Meter (m) easy Pressure is defined as force divided by what?
(A) Area (B) Mass (C) Speed (D) Volume easy 11 pollution of Air and Water215 Qs → Sample questions
What gas mainly causes the greenhouse effect and contributes to air pollution?
(A) Oxygen (O₂) (B) Carbon dioxide (CO₂) (C) Nitrogen (N₂) (D) Helium (He) easy Which of the following pollutants is commonly released from vehicle exhaust?
(A) Methane (CH₄) (B) Carbon monoxide (CO) (C) Ozone (O₃) (D) Argon (Ar) easy Which term describes water polluted by harmful substances?
(A) Clean water (B) Potable water (C) Contaminated water (D) Distilled water easy 12 Microorganisms: Friend and Foe215 Qs → Sample questions
Which microorganism is used to make bread rise?
(A) Virus (B) Yeast (C) Algae (D) Protozoa easy Which microorganism is used to make curd from milk?
(A) Bacteria (B) Virus (C) Algae (D) Protozoa easy Which of these is a harmful effect of microorganisms?
(A) Breaking down dead plants (B) Helping in digestion (C) Causing food poisoning (D) Producing vitamins easy 13 Friction214 Qs → Sample questions
If the coefficient of friction ($\mu$) is $0.3$ and the normal force ($N$) is $50\, \text{N}$, what is the frictional force?
(A) 15 N (B) 0.6 N (C) 150 N (D) 3 N easy Which of these surfaces will likely have the highest friction?
(A) Ice (B) Sandpaper (C) Glass (D) Polished wood easy Which type of friction is acting when you push a stationary box but it does not move?
(A) Static friction (B) Kinetic friction (C) Rolling friction (D) Fluid friction easy 14 Chemical Effects of Electric Current213 Qs → Sample questions
During electrolysis of water, which gas is produced at the cathode?
(A) Oxygen (B) Hydrogen (C) Chlorine (D) Nitrogen easy Which of the following materials is commonly used as an electrolyte in electroplating?
(A) Copper sulphate solution (B) Distilled water (C) Sugar solution (D) Salt water easy Electroplating is mainly used to improve the _____ of an object.
(A) Color (B) Resistance (C) Appearance and resistance to corrosion (D) Size easy 15 Sound212 Qs → Sample questions
What property of sound determines its pitch?
(A) Frequency (B) Amplitude (C) Speed (D) Wavelength easy Which instrument is used to measure the pitch of a sound?
(A) Tuning fork (B) Oscilloscope (C) Decibel meter (D) Thermometer easy What is the unit of measuring the frequency of sound?
(A) Hertz (Hz) (B) Decibel (dB) (C) Meter (m) (D) Second (s) easy 16 Light212 Qs → Sample questions
The formula to calculate the distance traveled by light is: Distance = Speed $\times$ ____?
(A) Mass (B) Time (C) Force (D) Acceleration easy A ray of light strikes a plane mirror at an angle of $30^{\circ}$. What is the angle of reflection?
(A) $30^{\circ}$ (B) $60^{\circ}$ (C) $90^{\circ}$ (D) $0^{\circ}$ easy Which color of visible light has the shortest wavelength?
(A) Red (B) Blue (C) Green (D) Yellow easy 17 Conservation of Plants and Animals195 Qs → Sample questions
What is the term used for the gradual disappearance of a species from the earth?
(A) Extinction (B) Conservation (C) Pollination (D) Growth easy Which one of the following is NOT a method of conserving animals?
(A) Establishing wildlife sanctuaries (B) Poaching (C) Breeding in captivity (D) Protecting natural habitats easy Which of these helps in preventing soil erosion and conserving plants?
(A) Planting trees (B) Cutting trees (C) Burning forests (D) Overgrazing easy 18 Reaching the Age of Adolescence68 Qs → Sample questions
Reproductive age in women starts when their:
(A) menstruation starts (B) breasts start developing (C) body weight increases (D) height increases easy The right meal for adolescents consists of:
(A) chips, noodles, coke (B) chapati, dal, vegetables (C) rice, noodles and burger (D) vegetable cutlets, chips and lemon drink easy Which of the following combination of chromosomes lead to the birth of a baby girl:
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