Class 11 Mathematics — Chapter 10: Straight Lines
66 practice questions · 22 Easy · 22 Medium · 22 Hard
Practise Class 11 Mathematics Chapter 10, "Straight Lines", with 66 NCERT-aligned multiple-choice questions. The set is split into 22 Easy, 22 Medium and 22 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main and JEE Advanced.
"Straight Lines" is one of the chapters where problem-solving speed, formula recall and step-by-step reasoning really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Straight Lines, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Mathematics mastery score. A few sample questions are shown below; sign in free to practise all 66.
Key concepts: Straight Lines (Class 11 Mathematics)
This chapter covers the slope of a line, the various forms of a line's equation, the angle between lines, and the distance of a point from a line.
- Slope
- Slope m = (y₂ − y₁)/(x₂ − x₁) = tanθ; parallel lines have equal slopes, perpendicular lines have m₁m₂ = −1.
- Forms of a line
- Slope-intercept (y = mx + c), point-slope, two-point, intercept and normal forms.
- General equation
- Ax + By + C = 0 represents every straight line; its slope is −A/B.
- Angle between lines
- tanθ = |(m₁ − m₂)/(1 + m₁m₂)| gives the acute angle between two lines.
- Distance of a point
- The perpendicular distance from a point to a line is found with the distance formula.
Key formulas — Straight Lines
💡 Exam tips for Straight Lines
- Perpendicular lines satisfy m₁·m₂ = −1; parallel lines have equal slopes.
- Pick the line-form that fits the given data (point + slope, two points, intercepts) to save time.
Sample questions
Slope of line through (1,2) and (3,8):
(8−2)/(3−1)=3.
Two non-vertical lines are parallel iff:
Same slope → parallel.
Two lines are perpendicular iff:
Slopes are negative reciprocals.
Straight Lines — FAQs
What are the key concepts in Class 11 Mathematics Straight Lines?+
This chapter covers the slope of a line, the various forms of a line's equation, the angle between lines, and the distance of a point from a line. Key ideas include Slope, Forms of a line, General equation, Angle between lines, Distance of a point.
What does Class 11 Mathematics Chapter 10 (Straight Lines) cover on XamBaaz?+
It covers 66 NCERT-aligned MCQs on "Straight Lines" — 22 Easy, 22 Medium and 22 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main and JEE Advanced.
Are these "Straight Lines" questions free to practise?+
Yes — sign in with Google to practise "Straight Lines" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Straight Lines" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Practise all 66 questions free
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