Identify the technique used to know the binding nature of nanomaterials.

Which metal ion gives a violet bead in the borax bead test?

If steel is heated to a temperature well below red heat and is then cooled slowly,the process is called

What type of information is collected using $FTIR$ (Fourier transform infrared) spectroscopy?

What is the formula of microcosmic salt?

Given below are two statements:
Statement $I$: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement $II$: Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.
In the light of the above statements,choose the most appropriate answer from the options given below.