Determinants MCQs Class 12 Maths (NCERT Based)
Determinants MCQs Class 12 Maths (NCERT Based)
Class: CBSE Class 12 Mathematics
Subject: Mathematics
Section: Determinants
Topic: Determinants MCQs (NCERT Based)
Board: CBSE Board Examinations
Subject: Mathematics
Section: Determinants
Topic: Determinants MCQs (NCERT Based)
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. Determinant is defined for:
Answer: B
Explanation: Equal rows and columns required.
Explanation: Equal rows and columns required.
Q2. |I| for identity matrix equals:
Answer: B
Explanation: Product of diagonal ones.
Explanation: Product of diagonal ones.
Q3. If two rows are equal, determinant:
Answer: B
Explanation: Linear dependence ⇒ zero.
Explanation: Linear dependence ⇒ zero.
Q4. Interchanging rows changes determinant:
Answer: B
Explanation: Sign reverses.
Explanation: Sign reverses.
Q5. Determinant of triangular matrix:
Answer: B
Explanation: Diagonal product.
Explanation: Diagonal product.
Q6. If |A|=0, matrix is:
Answer: A
Explanation: Not invertible.
Explanation: Not invertible.
Q7. If |A|≠0, matrix is:
Answer: B
Explanation: Invertible.
Explanation: Invertible.
Q8. |Aᵀ| =
Answer: A
Explanation: Determinant unchanged.
Explanation: Determinant unchanged.
Q9. |AB| =
Answer: B
Explanation: Multiplicative property.
Explanation: Multiplicative property.
Q10. Determinant represents:
Answer: A
Explanation: Geometric interpretation.
Explanation: Geometric interpretation.
Q11. Minor formed by:
Answer: A
Explanation: Definition.
Explanation: Definition.
Q12. Cofactor equals:
Answer: B
Explanation: Sign factor applied.
Explanation: Sign factor applied.
Q13. Determinant unchanged if:
Answer: A
Explanation: Elementary property.
Explanation: Elementary property.
Q14. |kA| =
Answer: C
Explanation: n = order.
Explanation: n = order.
Q15. Determinant of 1×1 matrix:
Answer: A
Explanation: Single value.
Explanation: Single value.
Q16. If rows proportional:
Answer: B
Explanation: Linear dependence.
Explanation: Linear dependence.
Q17. Determinant used to find:
Answer: D
Explanation: Multiple uses.
Explanation: Multiple uses.
Q18. If |A|=1, matrix called:
Answer: A
Explanation: Special determinant property.
Explanation: Special determinant property.
Q19. Expansion theorem called:
Answer: A
Explanation: Cofactor expansion.
Explanation: Cofactor expansion.
Q20. If |A|=0, inverse:
Answer: B
Explanation: Singular matrix.
Explanation: Singular matrix.
