The $IUPAC$ name of the compound is

$A$ wooden cube of side $10 \ cm$ floats at the interface between water and oil with its lower surface $3 \ cm$ below the interface. If the density of oil is $0.9 \ g \ cm^{-3}$, the mass of the wooden cube is (in $g$)

In a $\triangle ABC$,the expression $\frac{(a+b+c)(b+c-a)(c+a-b)(a+b-c)}{4b^2c^2}$ is equal to:

Parts $A, B, C$ and $D$ of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions / characteristics:

Equivalent conductivity of $Cr_2(SO_4)_3$ is related to molar conductivity by the expression

The $d-$orbitals which are involved in the hybridization of the central atom in $ICl_4^{-}$ are: