Which of the following compounds gives oxygen on fast heating?
$(I)$ $AgNO_3$
$(II)$ $CaCO_3$
$(III)$ $Pb(NO_3)_2$
$(IV)$ $Na_2CO_3$

Which of the following is $NOT$ included in in-situ conservation?

In humans,which disorder is caused due to the absence of one of the $X$ chromosomes,i.e.,$45$ with $XO$?

If $(2,-1,3)$ is the foot of the perpendicular drawn from the origin to the plane, then the equation of the plane is

Let $P = \{\theta : \sin \theta - \cos \theta = \sqrt{2} \cos \theta\}$ and $Q = \{\theta : \sin \theta + \cos \theta = \sqrt{2} \sin \theta\}$ be two sets,then:

$A$ thin plano-convex lens of focal length $73.5 \text{ cm}$ has a circular aperture of diameter $8.4 \text{ cm}$. If the refractive index of the material of the lens is $\frac{5}{3}$, then the thickness of the lens is nearly