The bleaching action of $SO_2$ is due to its .........

The number of ways that $8$ beads of different colours can be strung as a necklace is

$Assertion$ : The driver in a vehicle moving with a constant speed on a straight road is in a non-inertial frame of reference.
$Reason$ : $A$ reference frame in which Newton's laws of motion are applicable is non-inertial.

Which of the following is a fossil pteridophyte?

$\log _4 2 - \log _8 2 + \log _{16} 2 - \dots$ is equal to

The area (in square units) of the region bounded by the curve $y=|\sin 2x|$ and the $X$-axis in the interval $[0, 2\pi]$ is: