The hybridisation of $Xe$ and the number of lone pairs of electrons on it in $XeF_6$ are

In which of the following does the central atom $NOT$ use $sp^3$ hybrid orbitals in its bonding?

Cirrhosis is:

Which of the following is not a chromophore?

Two strings $A$ and $B$ of lengths $L_A = 80 \ cm$ and $L_B = x \ cm$ respectively are used separately in a sonometer. The ratio of their densities $(d_A / d_B)$ is $0.81$. The diameter of $B$ is one-half that of $A$. If the strings have the same tension and fundamental frequency,the value of $x$ is:

What is obtained by the electrolysis of carnallite?