Objective Questions on Matrix Operations with Answers
Objective Questions on Matrix Operations with Answers
Class: CBSE Class 12 Mathematics
Subject: Mathematics
Section: Matrices
Topic: Matrix Operations
Board: CBSE Board Examinations
Subject: Mathematics
Section: Matrices
Topic: Matrix Operations
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. Matrix addition is possible when matrices have:
Answer: A
Explanation: Addition requires equal rows and columns.
Explanation: Addition requires equal rows and columns.
Q2. If A and B are same order, A+B =
Answer: A
Explanation: Corresponding elements added.
Explanation: Corresponding elements added.
Q3. Scalar multiplication means:
Answer: B
Explanation: Each entry scaled.
Explanation: Each entry scaled.
Q4. If A is m×n and B is n×p, AB order is:
Answer: A
Explanation: Rows of A × columns of B.
Explanation: Rows of A × columns of B.
Q5. Matrix multiplication is:
Answer: B
Explanation: AB ≠ BA generally.
Explanation: AB ≠ BA generally.
Q6. AI =
Answer: B
Explanation: Identity property.
Explanation: Identity property.
Q7. A0 =
Answer: C
Explanation: Zero multiplication property.
Explanation: Zero multiplication property.
Q8. (AB)ᵀ =
Answer: B
Explanation: Reverse order transpose rule.
Explanation: Reverse order transpose rule.
Q9. Distributive law holds for:
Answer: C
Explanation: Matrix multiplication distributive.
Explanation: Matrix multiplication distributive.
Q10. If AB defined, inner dimensions must:
Answer: A
Explanation: Columns of A = rows of B.
Explanation: Columns of A = rows of B.
Q11. (kA)B =
Answer: D
Explanation: Scalar associative.
Explanation: Scalar associative.
Q12. (A+B)ᵀ =
Answer: A
Explanation: Transpose distributive.
Explanation: Transpose distributive.
Q13. A(A⁻¹) =
Answer: A
Explanation: Inverse definition.
Explanation: Inverse definition.
Q14. If AB=I then B is:
Answer: A
Explanation: Multiplicative inverse.
Explanation: Multiplicative inverse.
Q15. Matrix multiplication associative?
Answer: A
Explanation: (AB)C=A(BC).
Explanation: (AB)C=A(BC).
Q16. Identity matrix order for 3×3 A:
Answer: B
Explanation: Must match order.
Explanation: Must match order.
Q17. If A symmetric, Aᵀ =
Answer: A
Explanation: Symmetry definition.
Explanation: Symmetry definition.
Q18. Zero matrix acts as:
Answer: A
Explanation: A+0=A.
Explanation: A+0=A.
Q19. If A square, AA defined?
Answer: A
Explanation: Inner dimensions equal.
Explanation: Inner dimensions equal.
Q20. Matrix operations follow:
Answer: A
Explanation: Based on algebraic structures.
Explanation: Based on algebraic structures.