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Matrices
NCERT Class 12
CBSE
Grade 12

Question:

The diagonal elements of a skew-symmetric matrix are all:
(a) Zero
(b) One
(c) Equal non-zero integers
(d) Irrational numbers

Step-by-Step Solution

$a_{ii} = -a_{ii} \Rightarrow 2a_{ii} = 0 \Rightarrow a_{ii} = 0$. [1.0 Mark]

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🎯 Official CBSE Marking Scheme:
Selecting Zero: 1.0 Mark

Correct Answer: Zero
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