Search One Roof Education

Class 10 · Science · Chapter 10

Find the power of a concave lens whose focal length is 25 cm.

Class 9 · Science · Chapter 8

A car speeds up uniformly from 18 km/h to 36 km/h in 5 s. Find its acceleration and the distance it covers in this time.

Class 9 · Maths · Chapter 2

Use the factor theorem to check whether (x + 1) is a factor of x³ + x² + x + 1.

Class 9 · Maths · Chapter 1

Explain how √2 can be located on the number line using a right-angled triangle.

Class 10 · Science · Chapter 1

Describe what you observe when a zinc strip is dipped in copper sulphate solution, and explain why it happens.

Class 10 · Science · Chapter 10

Why does a pencil appear bent when partly dipped in water?

Class 10 · Maths · Chapter 4

The product of two consecutive positive integers is 306. Form and solve the equation.

Class 9 · Science · Chapter 8

A car starting from rest reaches 20 m/s in 5 s. Find its acceleration and the distance covered.

Class 9 · Maths · Chapter 1

Rationalise the denominator of 1/(√5 − 2).

Class 10 · Science · Chapter 1

What is rancidity and how can it be prevented?

Class 10 · Science · Chapter 1

A chemical equation must be balanced because matter cannot be created or destroyed — the number of atoms of each element must be the same o…

Class 9 · Science · Chapter 9

Balanced forces do not change the state of motion of an object; unbalanced forces do. Newton's first law states that an object stays at res…

Class 10 · Maths · Chapter 3

A pair of linear equations a₁x + b₁y + c₁ = 0 and a₂x + b₂y + c₂ = 0 can be solved graphically or algebraically. Graphically, the two lines…

Class 10 · Maths · Chapter 2

The zeroes of a polynomial are the x-values where its graph meets the x-axis. A quadratic polynomial has at most 2 zeroes and a cubic has a…

Class 9 · Science · Chapter 1

Matter is made of very small particles that have space between them, are constantly moving and attract one another. Solids have a fixed sha…

Class 10 · Science · Chapter 1

Combination: A + B → AB Decomposition: AB → A + B Displacement: A + BC → AC + B Double displacement: AB + CD → AD + CB Oxidation: gain of o…

Class 10 · Science · Chapter 10

Mirror formula: 1/v + 1/u = 1/f Magnification (mirror): m = −v/u = h′/h Focal length of a spherical mirror: f = R/2 Lens formula: 1/v − 1/u…

Class 10 · Maths · Chapter 3

General pair: a₁x + b₁y + c₁ = 0 and a₂x + b₂y + c₂ = 0 Unique solution (intersecting lines): a₁/a₂ ≠ b₁/b₂ No solution (parallel lines): a…

Class 9 · Science · Chapter 9

Force: F = ma (SI unit: newton, N) Momentum: p = mv (SI unit: kg·m/s) Second law: F = (mv − mu)/t Impulse: F × t = mv − mu (change in momen…

Class 9 · Science · Chapter 1

Temperature: 0 °C = 273.15 K (K = °C + 273) Melting point of ice = 0 °C = 273 K Boiling point of water = 100 °C = 373 K Latent heat of fusi…

Exam Strategy

Regular test practice reveals weak areas early. Generate a chapter test and track your progress.

Guides

NCERT solutions help most when you try the question first. Here's how to use them well.

Study Tips

Simple, practical study tips to prepare well for your CBSE Class 10 board exams.

Class 9 · Maths

Concept-focused Class 9 Maths coaching aligned to CBSE.

Class 9 · Science

Class 9 Science coaching across Physics, Chemistry and Biology.

Class 10 · Maths

Board-focused Class 10 Maths coaching with test practice.

Class 10 · Science

Class 10 Science coaching for the CBSE board exam.

Class 11 · Commerce

Class 11 Commerce coaching — Accountancy, Business Studies & Economics.