What amount of electricity is required to deposit one mole of aluminium from a solution of AlCl3?
One Faraday
One ampere
Three Faradays
Three amperes
Correct answer is C
AlCl3 → Al3+ + 3Cl-
At cathode:
Al3+ + 3e- → Al
3 mole of electrons corresponds 3 F charge
So, required charge =3 F
The following compounds are condensation polymers except
nylon
protein
starch
polyethene
Correct answer is D
Condensation polymers are any kind of polymers whose process of polymerization involves a condensation reaction.
The cleansing effect of soap is low in acidic water because of
the formation of unionized fatty acid.
increase in the pH of the soap molecules.
anti-biodegradable effect of hydrogen ions
the hardness of the acidic water.
Correct answer is A
Soaps cannot be used in acidic condition because they lose their cleansing effect due to the formation of long chain fatty acids
Which of the following sugars is a product of the condensation of monosaccharides?
galactose
maltose
glucose
fructose
Correct answer is B
Maltose is produced by the enzymatic hydrolysis of starch (a homopolysaccharide) catalyzed by the enzyme amylase.
The by-product of fermentation of sugar is
carbon(IV) oxide.
ethanoic acid.
propanol
propan-1, 2, 3- triol.
Correct answer is A
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as by-products