The length of the latus rectum of the parabola $y^2+8x-2y+17=0$ is

If $\omega$ is a complex cube root of unity,then $\sin \left\{\left(\omega^{10}+\omega^{23}\right) \pi-\frac{\pi}{4}\right\}$ is equal to

Which one of the following ions exhibits the highest magnetic moment?

Tracheids differ from other tracheary elements in

The radius of a circular plate is increasing at the rate of $0.01 \text{ cm/s}$ when the radius is $12 \text{ cm}$. Then, the rate at which the area increases, is

Which of the following reagents convert the propene to $1-$propanol?