Practice 100 original JEE Main 2026 MCQs with answers and explanations. Includes Physics, Chemistry, and Mathematics questions based on the latest NCERT syllabus. This all 100 MCQ divided into four Parts for better study.
Part-1
JEE Main 2026 Practice MCQs (Part 1) – Questions 1 to 25
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Physics, Chemistry & Mathematics | With Answers and Explanations
Difficulty Level: Easy to Moderate
Based on: JEE Main 2026 Syllabus (NCERT + Concept-Based Questions)
PHYSICS MCQs (1–9)
Q1. The SI unit of electric charge is:
A) Volt
B) Coulomb
C) Ampere
D) Ohm
✅ Answer: B) Coulomb
Explanation: Electric charge is measured in coulombs (C). One coulomb equals the amount of charge transported by a current of one ampere in one second.
Q2. Which law explains the relationship between force, mass, and acceleration?
A) Newton's First Law
B) Newton's Second Law
C) Newton's Third Law
D) Law of Gravitation
✅ Answer: B) Newton's Second Law
Explanation: According to Newton's Second Law,
F = ma, where force equals mass multiplied by acceleration.
Q3. The speed of light in vacuum is approximately:
A) 3 × 10⁶ m/s
B) 3 × 10⁷ m/s
C) 3 × 10⁸ m/s
D) 3 × 10⁹ m/s
✅ Answer: C) 3 × 10⁸ m/s
Q4. Which quantity is a vector?
A) Distance
B) Speed
C) Work
D) Velocity
✅ Answer: D) Velocity
Explanation: Velocity has both magnitude and direction.
Q5. Which particle has no electric charge?
A) Electron
B) Proton
C) Neutron
D) Positron
✅ Answer: C) Neutron
Q6. The unit of power is:
A) Joule
B) Newton
C) Watt
D) Pascal
✅ Answer: C) Watt
Q7. Which mirror always forms a virtual and diminished image?
A) Concave mirror
B) Convex mirror
C) Plane mirror
D) None of these
✅ Answer: B) Convex mirror
Q8. The dimensional formula of force is:
A) MLT⁻¹
B) MLT⁻²
C) ML²T⁻²
D) MT⁻²
✅ Answer: B) MLT⁻²
Q9. Which electromagnetic wave has the highest frequency?
A) Radio Waves
B) Microwaves
C) X-rays
D) Gamma Rays
✅ Answer: D) Gamma Rays
CHEMISTRY MCQs (10–17)
Q10. The atomic number of Carbon is:
A) 4
B) 6
C) 8
D) 12
✅ Answer: B) 6
Q11. The pH of a neutral solution at 25°C is:
A) 5
B) 6
C) 7
D) 8
✅ Answer: C) 7
Q12. Which gas is released when zinc reacts with dilute hydrochloric acid?
A) Oxygen
B) Carbon dioxide
C) Hydrogen
D) Chlorine
✅ Answer: C) Hydrogen
Q13. Avogadro's number is:
A) 6.022 × 10²³
B) 3 × 10⁸
C) 9.8
D) 22.4
✅ Answer: A) 6.022 × 10²³
Q14. Which element belongs to the halogen family?
A) Sodium
B) Chlorine
C) Neon
D) Magnesium
✅ Answer: B) Chlorine
Q15. The strongest intermolecular force among the following is:
A) London dispersion force
B) Dipole-dipole force
C) Hydrogen bonding
D) Van der Waals force
✅ Answer: C) Hydrogen bonding
Q16. Which of the following is an alkali metal?
A) Calcium
B) Potassium
C) Aluminium
D) Iron
✅ Answer: B) Potassium
Q17. The oxidation state of oxygen in water is:
A) +2
B) –1
C) –2
D) 0
✅ Answer: C) –2
MATHEMATICS MCQs (18–25)
Q18. The value of sin 90° is:
A) 0
B) 1
C) 1/2
D) √3/2
✅ Answer: B) 1
Q19. If x² = 49, then x can be:
A) 7 only
B) –7 only
C) ±7
D) 49
✅ Answer: C) ±7
Q20. The derivative of x² is:
A) x
B) 2x
C) x²
D) 2
✅ Answer: B) 2x
Q21. The sum of interior angles of a triangle is:
A) 90°
B) 180°
C) 270°
D) 360°
✅ Answer: B) 180°
Q22. What is the value of log₁₀(100)?
A) 1
B) 2
C) 10
D) 100
✅ Answer: B) 2
Q23. If A = {1,2,3}, then the number of subsets is:
A) 3
B) 6
C) 8
D) 9
✅ Answer: C) 8
Q24. The slope of the line y = 4x + 3 is:
A) 3
B) 4
C) 7
D) –4
✅ Answer: B) 4
Q25. The value of (2³ × 2²) is:
A) 16
B) 32
C) 64
D) 128
✅ Answer: B) 32
Explanation:
Using the law of exponents:
2³ × 2² = 2⁽³⁺²⁾ = 2⁵ = 32
Part-2
PHYSICS MCQs (26–34)
Q26. A body continues moving with constant velocity when:
A) A net force acts on it
B) No external unbalanced force acts on it
C) Gravity is absent
D) Friction is maximum
✅ Answer: B) No external unbalanced force acts on it
Explanation: According to Newton's First Law, an object maintains its state of rest or uniform motion unless acted upon by an unbalanced external force.
Q27. Which physical quantity has the SI unit Joule?
A) Force
B) Pressure
C) Energy
D) Momentum
✅ Answer: C) Energy
Q28. The acceleration due to gravity on Earth is approximately:
A) 5.8 m/s²
B) 9.8 m/s²
C) 12.5 m/s²
D) 15 m/s²
✅ Answer: B) 9.8 m/s²
Q29. The frequency of an electromagnetic wave remains unchanged when it passes from air into glass.
A) True
B) False
C) Depends on wavelength
D) Depends on refractive index
✅ Answer: A) True
Explanation: Frequency is determined by the source and remains constant. Speed and wavelength change in different media.
Q30. Which device converts electrical energy into mechanical energy?
A) Generator
B) Transformer
C) Electric Motor
D) Battery
✅ Answer: C) Electric Motor
Q31. The work done by a force perpendicular to displacement is:
A) Maximum
B) Zero
C) Positive
D) Negative
✅ Answer: B) Zero
Q32. The unit of electric current is:
A) Volt
B) Coulomb
C) Ampere
D) Ohm
✅ Answer: C) Ampere
Q33. Which colour of visible light has the shortest wavelength?
A) Red
B) Yellow
C) Green
D) Violet
✅ Answer: D) Violet
Q34. Which law states that pressure applied to a confined fluid is transmitted equally in all directions?
A) Bernoulli's Principle
B) Pascal's Law
C) Archimedes' Principle
D) Boyle's Law
✅ Answer: B) Pascal's Law
CHEMISTRY MCQs (35–42)
Q35. Which gas is most abundant in Earth's atmosphere?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Argon
✅ Answer: C) Nitrogen
Q36. Which of the following is a noble gas?
A) Chlorine
B) Helium
C) Fluorine
D) Sulphur
✅ Answer: B) Helium
Q37. The molecular formula of glucose is:
A) C₂H₅OH
B) C₆H₁₂O₆
C) CH₄
D) C₁₂H₂₂O₁₁
✅ Answer: B) C₆H₁₂O₆
Q38. Which acid is present in vinegar?
A) Citric acid
B) Hydrochloric acid
C) Acetic acid
D) Sulphuric acid
✅ Answer: C) Acetic acid
Q39. The process of loss of electrons is called:
A) Reduction
B) Oxidation
C) Neutralization
D) Sublimation
✅ Answer: B) Oxidation
Q40. Which element has the chemical symbol "K"?
A) Krypton
B) Potassium
C) Calcium
D) Cobalt
✅ Answer: B) Potassium
Q41. Which bond is formed by sharing electrons?
A) Ionic bond
B) Covalent bond
C) Metallic bond
D) Hydrogen bond
✅ Answer: B) Covalent bond
Q42. Which one is an example of an exothermic reaction?
A) Photosynthesis
B) Melting of ice
C) Combustion of methane
D) Evaporation of water
✅ Answer: C) Combustion of methane
MATHEMATICS MCQs (43–50)
Q43. Solve: 2x + 7 = 19
A) 4
B) 5
C) 6
D) 7
✅ Answer: C) 6
Q44. The value of cos 0° is:
A) 0
B) 1
C) 1/2
D) √3/2
✅ Answer: B) 1
Q45. The probability of getting a head in a single toss of a fair coin is:
A) 0
B) 1/4
C) 1/2
D) 1
✅ Answer: C) 1/2
Q46. If log₁₀ x = 3, then x equals:
A) 30
B) 100
C) 1000
D) 3000
✅ Answer: C) 1000
Q47. The value of √144 is:
A) 10
B) 11
C) 12
D) 13
✅ Answer: C) 12
Q48. If a circle has radius 7 cm, its diameter is:
A) 7 cm
B) 14 cm
C) 21 cm
D) 49 cm
✅ Answer: B) 14 cm
Q49. Which of the following is a prime number?
A) 21
B) 27
C) 31
D) 39
✅ Answer: C) 31
Q50. The value of (5² − 3²) is:
A) 12
B) 14
C) 16
D) 18
✅ Answer: C) 16
Explanation:
5² = 25
3² = 9
25 − 9 = 16
Part-3
PHYSICS MCQs (51–59)
Q51. Which quantity remains constant in a simple pendulum (ignoring air resistance)?
A) Kinetic Energy
B) Potential Energy
C) Mechanical Energy
D) Velocity
✅ Answer: C) Mechanical Energy
Explanation: In the absence of non-conservative forces, the total mechanical energy remains constant.
Q52. The SI unit of momentum is:
A) kg·m/s
B) Newton
C) Joule
D) Watt
✅ Answer: A) kg·m/s
Q53. Which instrument is used to measure atmospheric pressure?
A) Thermometer
B) Barometer
C) Hygrometer
D) Ammeter
✅ Answer: B) Barometer
Q54. A convex lens always forms a virtual image when the object is:
A) At infinity
B) Beyond 2F
C) Between F and the lens
D) At 2F
✅ Answer: C) Between F and the lens
Q55. The resistance of a conductor increases with:
A) Increase in temperature (for metals)
B) Decrease in length
C) Increase in area
D) Decrease in resistivity
✅ Answer: A) Increase in temperature (for metals)
Q56. Which colour has the maximum wavelength in the visible spectrum?
A) Violet
B) Blue
C) Green
D) Red
✅ Answer: D) Red
Q57. The energy stored in a stretched spring is:
A) Kinetic Energy
B) Chemical Energy
C) Elastic Potential Energy
D) Heat Energy
✅ Answer: C) Elastic Potential Energy
Q58. Which law is represented by the equation V = IR?
A) Faraday's Law
B) Ohm's Law
C) Kirchhoff's Law
D) Coulomb's Law
✅ Answer: B) Ohm's Law
Q59. Sound cannot travel through:
A) Air
B) Water
C) Steel
D) Vacuum
✅ Answer: D) Vacuum
CHEMISTRY MCQs (60–67)
Q60. Which of the following is the lightest element?
A) Helium
B) Hydrogen
C) Lithium
D) Carbon
✅ Answer: B) Hydrogen
Q61. Which particle has a negative charge?
A) Proton
B) Neutron
C) Electron
D) Alpha particle
✅ Answer: C) Electron
Q62. Which metal is liquid at room temperature?
A) Sodium
B) Mercury
C) Aluminium
D) Iron
✅ Answer: B) Mercury
Q63. The pH of lemon juice is generally:
A) Greater than 7
B) Equal to 7
C) Less than 7
D) Equal to 14
✅ Answer: C) Less than 7
Q64. Which gas is commonly known as laughing gas?
A) Carbon dioxide
B) Nitrous oxide
C) Sulphur dioxide
D) Nitrogen
✅ Answer: B) Nitrous oxide
Q65. Which type of bond exists in sodium chloride (NaCl)?
A) Covalent bond
B) Ionic bond
C) Metallic bond
D) Hydrogen bond
✅ Answer: B) Ionic bond
Q66. Which of the following is an alkaline earth metal?
A) Sodium
B) Magnesium
C) Potassium
D) Aluminium
✅ Answer: B) Magnesium
Q67. The catalyst used in the Haber process is:
A) Copper
B) Nickel
C) Iron
D) Zinc
✅ Answer: C) Iron
MATHEMATICS MCQs (68–75)
Q68. The value of tan 45° is:
A) 0
B) 1
C) √3
D) Undefined
✅ Answer: B) 1
Q69. If x + 8 = 15, then x equals:
A) 5
B) 6
C) 7
D) 8
✅ Answer: C) 7
Q70. The area of a square having side 9 cm is:
A) 18 cm²
B) 36 cm²
C) 72 cm²
D) 81 cm²
✅ Answer: D) 81 cm²
Q71. The value of 3⁴ is:
A) 9
B) 27
C) 81
D) 64
✅ Answer: C) 81
Q72. If the mean of 2, 4, 6, 8, 10 is:
A) 4
B) 5
C) 6
D) 7
✅ Answer: C) 6
Q73. Which of the following is an irrational number?
A) 0.5
B) 3/4
C) √2
D) 25
✅ Answer: C) √2
Q74. The equation of the x-axis is:
A) x = 0
B) y = 0
C) x = y
D) x = 1
✅ Answer: B) y = 0
Q75. The value of (12 ÷ 3) × 5 is:
A) 15
B) 18
C) 20
D) 25
✅ Answer: C) 20
Explanation:
12 ÷ 3 = 4
4 × 5 = 20
Part-4
PHYSICS MCQs (76–84)
Q76. A body is moving with uniform velocity. The net external force acting on it is:
A) Equal to its weight
B) Zero
C) Equal to its momentum
D) Equal to its acceleration
✅ Answer: B) Zero
Explanation: According to Newton's First Law, an object moving with constant velocity has zero net external force acting on it.
Q77. Which of the following is a scalar quantity?
A) Force
B) Velocity
C) Power
D) Acceleration
✅ Answer: C) Power
Q78. Which phenomenon explains the blue colour of the sky?
A) Reflection
B) Refraction
C) Scattering of light
D) Diffraction
✅ Answer: C) Scattering of light
Explanation: Shorter wavelengths (blue light) are scattered more by air molecules than longer wavelengths.
Q79. The SI unit of frequency is:
A) Joule
B) Hertz
C) Watt
D) Newton
✅ Answer: B) Hertz (Hz)
Q80. Which device converts mechanical energy into electrical energy?
A) Electric Motor
B) Generator
C) Transformer
D) Capacitor
✅ Answer: B) Generator
Q81. The escape velocity from Earth is approximately:
A) 7.9 km/s
B) 9.8 km/s
C) 11.2 km/s
D) 15 km/s
✅ Answer: C) 11.2 km/s
Q82. Which mirror is commonly used as a rear-view mirror in vehicles?
A) Plane Mirror
B) Concave Mirror
C) Convex Mirror
D) Cylindrical Mirror
✅ Answer: C) Convex Mirror
Q83. The SI unit of capacitance is:
A) Henry
B) Farad
C) Weber
D) Tesla
✅ Answer: B) Farad
Q84. The total mechanical energy of an ideal simple pendulum remains:
A) Increasing
B) Decreasing
C) Constant
D) Zero
✅ Answer: C) Constant
CHEMISTRY MCQs (85–92)
Q85. Which of the following is an alkaline earth metal?
A) Sodium
B) Calcium
C) Potassium
D) Aluminium
✅ Answer: B) Calcium
Q86. The chemical symbol of silver is:
A) Si
B) Ag
C) Au
D) Sr
✅ Answer: B) Ag
Q87. Which gas is essential for photosynthesis?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
✅ Answer: C) Carbon dioxide
Q88. Which acid is present in curd?
A) Citric acid
B) Lactic acid
C) Oxalic acid
D) Acetic acid
✅ Answer: B) Lactic acid
Q89. Which scientist proposed the modern periodic law?
A) Dalton
B) Rutherford
C) Mendeleev
D) Moseley
✅ Answer: D) Moseley
Explanation: The modern periodic law states that the properties of elements are periodic functions of their atomic numbers.
Q90. Which of the following is an example of a physical change?
A) Rusting of iron
B) Burning of paper
C) Melting of ice
D) Digestion of food
✅ Answer: C) Melting of ice
Q91. The oxidation number of hydrogen in H₂O is:
A) +1
B) –1
C) 0
D) +2
✅ Answer: A) +1
Q92. Which gas is produced during photosynthesis?
A) Carbon dioxide
B) Nitrogen
C) Oxygen
D) Hydrogen
✅ Answer: C) Oxygen
MATHEMATICS MCQs (93–100)
Q93. The value of sin 30° is:
A) 1
B) √3/2
C) 1/2
D) 0
✅ Answer: C) 1/2
Q94. Solve: 5x = 45
A) 7
B) 8
C) 9
D) 10
✅ Answer: C) 9
Q95. The sum of angles in a quadrilateral is:
A) 180°
B) 270°
C) 360°
D) 540°
✅ Answer: C) 360°
Q96. If √x = 8, then x equals:
A) 16
B) 32
C) 64
D) 128
✅ Answer: C) 64
Q97. The value of 10² is:
A) 20
B) 50
C) 100
D) 1000
✅ Answer: C) 100
Q98. The probability of getting an even number on a fair six-sided die is:
A) 1/6
B) 1/3
C) 1/2
D) 2/3
✅ Answer: C) 1/2
Explanation: Even numbers are 2, 4, and 6. There are 3 favourable outcomes out of 6 possible outcomes, so the probability is 3/6 = 1/2.
Q99. Which of the following is a polynomial?
A) 3x² + 2x + 1
B) 1/x
C) √x + 2
D) x⁻¹ + 5
✅ Answer: A) 3x² + 2x + 1
Q100. If the radius of a circle is 14 cm, its circumference is:
A) 44 cm
B) 66 cm
C) 88 cm
D) 176 cm
✅ Answer: C) 88 cm
Explanation:
Circumference = 2Ï€r
= 2 × (22/7) × 14
= 88 cm
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