25 DECEMBER 2020 CURRENT AFFAIRS QUIZ

only in combination with polyprotic bases

at pH values around neutrality

if their concentration is kept low

at pH values around any of their pKa's

sodium chloride

argon

methane

gasoline (heptanes & octanes)

2 times more basic

100 times more acidic

10 times more basic

10 times more acidic

All of these

H2CO3/HCO3-

Histidine+/histidine

H2PO4-/HPO42-

Michaelis-Menten equation

Hardy-Windberg law

Henderson-Hasselbalch equation

Haldanes equation

be repelled by water

It will be attracted to water

It will form a membrane in water

It will act as a buffer and stabilize the pH

The covalent bonds in water are highly polarized

The water molecule is asymmetric

All three atoms in the water molecule readily form hydrogen bonds

The water molecule readily forms hydrophobic interactions

Noncovalent bonds may also be present, especially if the molecule is large

The chemical bonds that hold the molecule together are relatively strong

Such molecules often result from the interaction of ionized atoms

Electrons are shared between the atoms that make up the molecule

Guanidinium ion

Imidazole

Indole

All of these

concentration of the conjugate base to the weak acid

temperature of buffer components

both (a) and (b)

molar concentration of the buffer components