CBSE Class 10 Linear Equations MCQs – Graphical Representation and Solutions
CBSE Class 10 Mathematics – Pair of Linear Equations MCQs
Chapter 3: Pair of Linear Equations in Two Variables
Topic: Graphical Representation and Solutions
Based on NCERT | As per Latest CBSE Board Examination Pattern
1. The solution of a pair of linear equations graphically is the:
Correct Answer: B
Explanation: Graphical solution is the point of intersection of the two lines representing the equations.
Explanation: Graphical solution is the point of intersection of the two lines representing the equations.
2. If two lines intersect at exactly one point, the system has:
Correct Answer: C
Explanation: Intersecting lines meet at one point ⇒ unique solution.
Explanation: Intersecting lines meet at one point ⇒ unique solution.
3. If two lines are parallel, the system has:
Correct Answer: B
Explanation: Parallel lines never intersect ⇒ no solution.
Explanation: Parallel lines never intersect ⇒ no solution.
4. If two equations represent the same line, the system has:
Correct Answer: C
Explanation: Coincident lines overlap completely ⇒ infinite solutions.
Explanation: Coincident lines overlap completely ⇒ infinite solutions.
5. Condition for unique solution is:
Correct Answer: A
Explanation: If a1/a2 ≠ b1/b2, lines intersect at one point ⇒ unique solution.
Explanation: If a1/a2 ≠ b1/b2, lines intersect at one point ⇒ unique solution.
6. Condition for no solution is:
Correct Answer: B
Explanation: Same slope but different intercept ⇒ parallel lines ⇒ no solution.
Explanation: Same slope but different intercept ⇒ parallel lines ⇒ no solution.
7. Condition for infinite solutions is:
Correct Answer: C
Explanation: All ratios equal ⇒ coincident lines ⇒ infinite solutions.
Explanation: All ratios equal ⇒ coincident lines ⇒ infinite solutions.
8. The graph of linear equation in two variables is:
Correct Answer: B
Explanation: Linear equation ax + by + c = 0 represents a straight line.
Explanation: Linear equation ax + by + c = 0 represents a straight line.
9. If lines intersect at (2,3), then:
Correct Answer: A
Explanation: Intersection point satisfies both equations.
Explanation: Intersection point satisfies both equations.
10. System 2x + 3y = 5 and 4x + 6y = 10 has:
Correct Answer: C
Explanation: Second equation is multiple of first ⇒ coincident lines.
Explanation: Second equation is multiple of first ⇒ coincident lines.
11. Graphical method gives solution by:
Correct Answer: C
Explanation: Plot both lines and find intersection.
Explanation: Plot both lines and find intersection.
12. If slopes of two lines are equal and intercepts differ, they are:
Correct Answer: B
Explanation: Same slope different intercept ⇒ parallel lines.
Explanation: Same slope different intercept ⇒ parallel lines.
13. A pair of linear equations may have maximum:
Correct Answer: D
Explanation: Depending on relation, system may have 0, 1 or infinite solutions.
Explanation: Depending on relation, system may have 0, 1 or infinite solutions.
14. If a1/a2 ≠ b1/b2, lines are:
Correct Answer: B
Explanation: Different slopes ⇒ intersecting lines.
Explanation: Different slopes ⇒ intersecting lines.
15. Solution of inconsistent system is:
Correct Answer: C
Explanation: Inconsistent system has no solution.
Explanation: Inconsistent system has no solution.
16. The ordered pair (0,0) is solution if:
Correct Answer: A
Explanation: Any ordered pair is solution only if it satisfies both equations.
Explanation: Any ordered pair is solution only if it satisfies both equations.
17. Consistent system means:
Correct Answer: B
Explanation: Consistent system has at least one solution (unique or infinite).
Explanation: Consistent system has at least one solution (unique or infinite).
18. In graphical method accuracy depends on:
Correct Answer: A
Explanation: More accurate graph plotting gives more accurate solution.
Explanation: More accurate graph plotting gives more accurate solution.
19. If two lines intersect at origin, solution is:
Correct Answer: A
Explanation: Intersection point is solution.
Explanation: Intersection point is solution.
20. Graphical method may be less accurate because:
Correct Answer: B
Explanation: Small plotting errors can change intersection point.
Explanation: Small plotting errors can change intersection point.
