NCERT Based MCQs on Limits and Continuity
NCERT Based MCQs on Limits and Continuity
Class: CBSE Class 12 Mathematics
Subject: Mathematics
Section: Continuity and Differentiability
Topic: Limits and Continuity
Board: CBSE Board Examinations
Subject: Mathematics
Section: Continuity and Differentiability
Topic: Limits and Continuity
Board: CBSE Board Examinations
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 12 Board Examination standard practice.
Q1. lim x→a f(x) exists if:
Answer: A
Explanation: Equal one‑sided limits.
Explanation: Equal one‑sided limits.
Q2. Continuity requires:
Answer: D
Explanation: Three conditions.
Explanation: Three conditions.
Q3. Removable discontinuity occurs when:
Answer: A
Explanation: Limit exists but value differs.
Explanation: Limit exists but value differs.
Q4. lim x→0 (sin x)/x =
Answer: B
Explanation: Standard limit.
Explanation: Standard limit.
Q5. Polynomial functions are:
Answer: A
Explanation: Defined for all x.
Explanation: Defined for all x.
Q6. Rational function discontinuity when:
Answer: A
Explanation: Undefined point.
Explanation: Undefined point.
Q7. lim x→∞ 1/x =
Answer: A
Explanation: Reciprocal decay.
Explanation: Reciprocal decay.
Q8. Exponential functions are:
Answer: A
Explanation: Smooth curves.
Explanation: Smooth curves.
Q9. Jump discontinuity means:
Answer: A
Explanation: Unequal one‑sided limits.
Explanation: Unequal one‑sided limits.
Q10. lim x→0 (1−cos x)/x² =
Answer: B
Explanation: Standard trigonometric limit.
Explanation: Standard trigonometric limit.
Q11. Log functions continuous on:
Answer: A
Explanation: Domain restriction.
Explanation: Domain restriction.
Q12. lim x→a c =
Answer: B
Explanation: Constant rule.
Explanation: Constant rule.
Q13. Sum of continuous functions:
Answer: A
Explanation: Closure property.
Explanation: Closure property.
Q14. Product of continuous functions:
Answer: A
Explanation: Algebra of continuity.
Explanation: Algebra of continuity.
Q15. Quotient continuous if denominator:
Answer: A
Explanation: Division defined.
Explanation: Division defined.
Q16. Absolute value function discontinuous at:
Answer: D
Explanation: Continuous but non‑differentiable.
Explanation: Continuous but non‑differentiable.
Q17. Infinite discontinuity example:
Answer: A
Explanation: Vertical asymptote.
Explanation: Vertical asymptote.
Q18. lim x→0 eˣ =
Answer: B
Explanation: Exponential limit.
Explanation: Exponential limit.
Q19. Continuity ensures graph is:
Answer: A
Explanation: No breaks.
Explanation: No breaks.
Q20. Limit concept measures:
Answer: A
Explanation: Behaviour near point.
Explanation: Behaviour near point.
