Which of the following is FALSE regarding the FT-IR signal of N-H in amines? Select one:
a. The spectrum of dimethylamine has this signal
b. Primary amines show two N-H signals for symmetric and asymmetric stretch
c. The N-H signal is in the region between 3100 -3500 cm–1
d. Secondary amines show only one N-H signal
e. The spectrum of triethylamine has this signal

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

there is none because earth is stationary and flat.

it is the most commonly accepted one