Which of the following alkenes does $NOT$ exhibit $cis-trans$ isomerism?

$A$ particle moves in a circle of radius $25 \ cm$ at two revolutions per second. The acceleration of the particle in $m/s^2$ is

If $R$ is the universal gas constant,the amount of heat needed to raise the temperature of $2 \, mol$ of an ideal monatomic gas from $273 \, K$ to $373 \, K$ when no work is done is: (in $, R$)

In the circuit shown,the current in the $1\,\Omega$ resistor is

The compound in which the number of $d\pi - p\pi$ bonds are equal to those present in $ClO_4^{-}$ is:

The radius of the circle $r = 12 \cos \theta + 5 \sin \theta$ is