Which of the following is a covalent compound?
A BaCl2
(B) CHO
c) LiOH
D KNO3


(B) CHO

Explanation:

A covalent bond is a bond type usually formed between non-metals that have little to no electronegativity differences between them.

Bonds between metals and non-metals are usually ionic in nature. All the other given choices are ionic and a combination of covalent bond.

CHO contains non-metals that are electronegative. There will be sharing of electrons between these atomic species and this will lead to a covalent bond.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.