Important MCQs on Types of Matrices
Important MCQs on Types of Matrices
Class: CBSE Class 12 Mathematics
Subject: Mathematics
Section: Matrices
Topic: Types of Matrices
Board: CBSE Board Examinations
Subject: Mathematics
Section: Matrices
Topic: Types of Matrices
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. A matrix having equal number of rows and columns is:
Answer: C
Explanation: Square matrix has order n×n.
Explanation: Square matrix has order n×n.
Q2. A matrix with one column is called:
Answer: B
Explanation: Single column definition.
Explanation: Single column definition.
Q3. Diagonal matrix has:
Answer: B
Explanation: Only diagonal may be non‑zero.
Explanation: Only diagonal may be non‑zero.
Q4. Identity matrix diagonal entries:
Answer: B
Explanation: Ones on principal diagonal.
Explanation: Ones on principal diagonal.
Q5. Zero matrix contains:
Answer: B
Explanation: All elements zero.
Explanation: All elements zero.
Q6. Symmetric matrix satisfies:
Answer: A
Explanation: Equal to its transpose.
Explanation: Equal to its transpose.
Q7. Skew symmetric matrix satisfies:
Answer: B
Explanation: Transpose equals negative.
Explanation: Transpose equals negative.
Q8. Diagonal elements of skew symmetric matrix:
Answer: C
Explanation: From Aᵀ=−A ⇒ aii=0.
Explanation: From Aᵀ=−A ⇒ aii=0.
Q9. Unit matrix is also called:
Answer: A
Explanation: Same meaning.
Explanation: Same meaning.
Q10. Scalar matrix has diagonal elements:
Answer: B
Explanation: kI form.
Explanation: kI form.
Q11. Row matrix order:
Answer: A
Explanation: One row only.
Explanation: One row only.
Q12. Column matrix order:
Answer: B
Explanation: One column only.
Explanation: One column only.
Q13. Diagonal matrix is always:
Answer: A
Explanation: Needs principal diagonal.
Explanation: Needs principal diagonal.
Q14. Identity matrix is:
Answer: C
Explanation: Special scalar matrix.
Explanation: Special scalar matrix.
Q15. Zero matrix is additive:
Answer: A
Explanation: A+0=A.
Explanation: A+0=A.
Q16. Symmetric + Skew symmetric =
Answer: A
Explanation: Any square matrix decomposed.
Explanation: Any square matrix decomposed.
Q17. Scalar matrix is multiple of:
Answer: B
Explanation: kI form.
Explanation: kI form.
Q18. Diagonal matrix transpose:
Answer: A
Explanation: Remains unchanged.
Explanation: Remains unchanged.
Q19. Identity matrix determinant:
Answer: B
Explanation: Product of diagonal ones.
Explanation: Product of diagonal ones.
Q20. Square matrix with all equal elements:
Answer: D
Explanation: Every entry same constant.
Explanation: Every entry same constant.