The direction of the angular velocity vector is along

Which of the following compounds does not react with $NaNO_2$ and $HCl$?

An atomic power nuclear reactor can deliver $300 \, MW$. The energy released due to the fission of each nucleus of a uranium atom $U^{238}$ is $170 \, MeV$. The number of uranium atoms fissioned per hour will be:

If the amplitude of $z-2-3i$ is $\frac{\pi}{4}$,then the locus of $z=x+iy$ is:

Which logic gate is represented by the following combination of logic gates?

Ectophloic siphonostele is found in ...........