Plus One Previous Year Question Papers and Answers

Preparing for exams becomes easier with previous year question papers and answers. These are valuable resources for understanding important concepts and improving performance. Below are detailed questions and answers for all Plus One subjects to help students excel in their exams. Each subject includes at least 20 well-explained questions and answers.

Plus One Mathematics

Question What is the value of sin(30°) + cos(60°)?

Answer
The value is 1.

Question Solve the quadratic equation: x² – 5x + 6 = 0.

Answer
The roots are x = 2 and x = 3.

Question What is the derivative of sin(x)?

Answer
The derivative is cos(x).

Question Find the integral of 2x dx.

Answer
The integral is x² + C.

Question If A = {1, 2, 3}, find the power set of A.

Answer
The power set is {{}, {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3}}.

Question State the Binomial Theorem for (a + b)ⁿ.

Answer
The Binomial Theorem is (a + b)ⁿ = Σ [nCk × aⁿ⁻ᵏ × bᵏ].

Question Find the value of log₅25.

Answer
The value is 2.

Question What is the equation of a circle with radius 5 and center (0, 0)?

Answer
The equation is x² + y² = 25.

Question Differentiate x² + 3x + 2.

Answer
The derivative is 2x + 3.

Question Solve for x: 3x – 4 = 2.

Answer
The solution is x = 2.

Question What is the slope of a line parallel to y = 3x + 5?

Answer
The slope is 3.

Question Evaluate the limit: lim(x→0) (sinx/x).

Answer
The value is 1.

Question What is the area of a triangle with base 5 and height 4?

Answer
The area is 10.

Question Convert 45° to radians.

Answer
The value in radians is π/4.

Question Find the sum of the first 10 natural numbers.

Answer
The sum is 55.

Question If y = eⁿ, find dy/dx.

Answer
The derivative is eⁿ.

Question What is the probability of getting a head when flipping a coin?

Answer
The probability is 1/2.

Question Define a skew-symmetric matrix.

Answer
A skew-symmetric matrix satisfies Aᵀ = -A.

Question Solve: logx = 3.

Answer
The value of x is 1000.

Plus One Physics

Question State Newton’s Second Law of Motion.

Answer
Force is equal to mass times acceleration (F = ma).

Question Define work in physics.

Answer
Work is the product of force and displacement in the direction of force.

Question What is the unit of power?

Answer
The unit is Watt (W).

Question Define potential energy.

Answer
Potential energy is the energy stored in a body due to its position.

Question State Ohm’s Law.

Answer
V = IR, where V is voltage, I is current, and R is resistance.

Question What is the speed of light in a vacuum?

Answer
The speed is 3 × 10⁸ m/s.

Question What is the SI unit of force?

Answer
The unit is Newton (N).

Question Define velocity.

Answer
Velocity is the rate of change of displacement with time.

Question What is the formula for kinetic energy?

Answer
The formula is KE = ½mv².

Question State the law of conservation of energy.

Answer
Energy can neither be created nor destroyed, only transformed.

Question What is the acceleration due to gravity on Earth?

Answer
The value is 9.8 m/s².

Question Define frequency.

Answer
Frequency is the number of oscillations per second.

Question What is the formula for momentum?

Answer
Momentum = mass × velocity.

Question State Archimedes’ Principle.

Answer
A body submerged in fluid experiences an upward force equal to the fluid displaced.

Question What is the SI unit of pressure?

Answer
The unit is Pascal (Pa).

Question Define wave.

Answer
A wave is a disturbance that transfers energy through a medium.

Question What is the formula for calculating torque?

Answer
Torque = force × perpendicular distance from the axis.

Question Define electric current.

Answer
Electric current is the flow of electric charge.

Question What is the formula for calculating density?

Answer
Density = mass/volume.

Plus One Chemistry

Question What is the atomic number of hydrogen?

Answer
The atomic number is 1.

Question Define an isotope.

Answer
Isotopes are atoms of the same element with different numbers of neutrons.

Question What is the formula for water?

Answer
The formula is H₂O.

Question What is the pH of a neutral solution?

Answer
The pH is 7.

Question State Boyle’s Law.

Answer
At constant temperature, the pressure of a gas is inversely proportional to its volume.

Question Define a covalent bond.

Answer
A covalent bond is formed by the sharing of electrons between atoms.

Question What is the molar mass of oxygen (O₂)?

Answer
The molar mass is 32 g/mol.

Question Define oxidation.

Answer
Oxidation is the loss of electrons.

Question What is the valency of carbon?

Answer
The valency is 4.

Question State Avogadro’s Law.

Answer
Equal volumes of gases contain an equal number of molecules under the same conditions.

Question Define an acid.

Answer
An acid is a substance that donates protons (H⁺ ions).

Question What is the chemical formula of sodium chloride?

Answer
The formula is NaCl.

Question Define a catalyst.

Answer
A catalyst speeds up a reaction without being consumed.

Question What is the boiling point of water?

Answer
The boiling point is 100°C.

Question Define molarity.

Answer
Molarity is the number of moles of solute per liter of solution.

Question What is the electron configuration of helium?

Answer
The configuration is 1s².

Question State Charles’s Law.

Answer
The volume of a gas is directly proportional to its temperature at constant pressure.

Question Define electrolysis.

Answer
Electrolysis is the process of decomposing a compound using electricity.

Question What is the formula for glucose?

Answer
The formula is C₆H₁₂O₆.

Studying previous year question papers is crucial for scoring well in exams. These questions offer insight into key topics and help students practice efficiently. Reviewing answers further strengthens understanding and confidence.