Among the following species, the diamagnetic molecule is

The peptide that gives positive ceric ammonium nitrate and carbylamine tests is :

Assertion: For the extraction of iron, haematite ore is used.

Reason: Haematite is a carbonate ore of iron.

10 mL of 1mM surfactant solution forms a monolayer covering 0.24 cm² on a polar substrate. If the polar head is approximated as cube, what is its edge length?