# Class 12 Math Chapter 3 MCQ Question Answer – Matrices NCERT Solution

NCERT Class 12 Math Matrices Chapter 3 MCQ Question Answer for Preparation of Exams. Here we Provide Class 12 Math Question Answer, Important Questions, MCQ for Various State Boards Students like CBSE, Haryana, uttar pradesh, mp and other state students.

Also Read : – Class 12 Math NCERT Solution

NCERT Class 12 Math Chapter 3 Matrices MCQ Question Answer Solution.

## Matrices Class 12 Math Chapter 3 MCQ Question Answer

Multiple Choice Questions and Answer for Easy to Understand the Chapter.

1. If a matrix has n no of columns and m no of rows, than order of matrix is
(A) m × n
(B) n × m
(C) m = n
(D) m > n

Ans. (A) m × n

2. A square matrix in which elements in the diagonal are all 1 and rest are all zero is called
(A) Diagonal Matrix
(B) Zero Matrix
(C) Scalar Matrix
(D) Identity Matrix

Ans. (D) Identity Matrix

3. The number of all possible matrices of order 3×3 with each entry 0 or 1 is:
(A) 18
(B) 27
(C) 512
(D) 243

Ans. (C) 512

4. A square matrix is said to be Symmetric if
(A) A’ = A
(B) A’ = – A
(C) A’ = 0
(D) None of the above

Ans. (A) A’ = A

5. “All the diagonal elements are zero” This is true for which of the following matrix?
(A) Symmetric Matrices
(B) Skew Symmetric Matrices
(C) Square Matrices
(D) All of the above

Ans. (B) Skew Symmetric Matrices

6. If A and B are symmetric matrices of same order, then AB – BA is a
(A) Symmetric Matrix
(B) Skew Symmetric Matrix
(C) Zero Matrix
(D) Identity Matrix

Ans. (B) Skew Symmetric Matrix

7. Matrices A and B will be inverse of each other only if
(A) AB = BA
(B) AB = BA = 0
(C) AB = 0, BA = 1
(D) AB = BA = I

Ans. (D) AB = BA = I

8. If the matrix A is both symmetric and skew symmetric, then
(A) A is a diagonal matrix
(B) A is a zero matrix
(C) A is a square matrix
(D) None of the above

Ans. (B) A is a zero matrix

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