Class 12 Maths Determinant Evaluation MCQs
Class 12 Maths Determinant Evaluation MCQs
Class: CBSE Class 12 Mathematics
Subject: Mathematics
Section: Determinants
Topic: Determinant Evaluation
Board: CBSE Board Examinations
Subject: Mathematics
Section: Determinants
Topic: Determinant Evaluation
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. Evaluate | 3 | :
Answer: C
Explanation: Determinant of 1×1 matrix equals the element.
Explanation: Determinant of 1×1 matrix equals the element.
Q2. Determinant of identity matrix of order 2:
Answer: B
Explanation: Product of diagonal ones.
Explanation: Product of diagonal ones.
Q3. If two rows identical, determinant:
Answer: B
Explanation: Linear dependence gives zero.
Explanation: Linear dependence gives zero.
Q4. Determinant of triangular matrix equals:
Answer: B
Explanation: Multiply diagonal elements.
Explanation: Multiply diagonal elements.
Q5. If one row all zeros:
Answer: B
Explanation: Determinant becomes zero.
Explanation: Determinant becomes zero.
Q6. |Aᵀ| =
Answer: A
Explanation: Transpose unchanged.
Explanation: Transpose unchanged.
Q7. |AB| =
Answer: B
Explanation: Product property.
Explanation: Product property.
Q8. If determinant zero, matrix:
Answer: A
Explanation: Non‑invertible.
Explanation: Non‑invertible.
Q9. Expansion theorem called:
Answer: A
Explanation: Cofactor expansion.
Explanation: Cofactor expansion.
Q10. Minor formed by:
Answer: A
Explanation: Minor definition.
Explanation: Minor definition.
Q11. Cofactor equals:
Answer: B
Explanation: Sign factor applied.
Explanation: Sign factor applied.
Q12. |kA| for n×n matrix:
Answer: C
Explanation: Depends on order.
Explanation: Depends on order.
Q13. Determinant helps find:
Answer: D
Explanation: Multiple uses.
Explanation: Multiple uses.
Q14. Determinant unchanged by:
Answer: A
Explanation: Elementary property.
Explanation: Elementary property.
Q15. If rows proportional:
Answer: B
Explanation: Linear dependence.
Explanation: Linear dependence.
Q16. Determinant of diagonal matrix:
Answer: B
Explanation: Diagonal product.
Explanation: Diagonal product.
Q17. If |A|=1, transformation preserves:
Answer: D
Explanation: Unit determinant property.
Explanation: Unit determinant property.
Q18. Determinant of zero matrix:
Answer: B
Explanation: All rows zero.
Explanation: All rows zero.
Q19. If determinant negative, orientation:
Answer: B
Explanation: Sign indicates orientation.
Explanation: Sign indicates orientation.
Q20. Determinant primarily evaluates:
Answer: A
Explanation: Linear transformation scale.
Explanation: Linear transformation scale.