Which of the following is an emulsifier?

The name of the complex ion,$[Fe(CN)_6]^{3-}$ is:

The distribution of relative intensity $I(\lambda)$ of blackbody radiation from a solid object versus the wavelength $\lambda$ is shown in the figure. If the Wien displacement law constant is $2.9 \times 10^{-3} \ mK$,what is the approximate temperature of the object in $K$?

$A$ photocell is a device used to:

Two spheres made of the same substance have diameters in the ratio $1: 2$. Their thermal capacities are in the ratio of .............

$f(x) = e^x \sin x$, then $f^{(6)}(x)$ is equal to :