The hydrolysis of acetic anhydride (CH3CO)2O + H2O-2CH3COOH is an example of :
a.Pseudo first order reaction
b.Pseudo second order reaction
c.Zero order reaction
d.Third order reaction
It is an example of pseudo first order reaction because here H2O is in excess. Thus, rate of reaction depends on only concentration of acetic anhydride.
Cryolite is used in the electrolytic extraction of aluminium, because .
a.it dissolves alumina
b.it dissolves sodium
c.it dissolves aluminium fluoride
d.it decreases the solubility
The use of molten cryolite as a solvent reduces some of the energy costs involved in extracting aluminium by allowing the ions in aluminium oxide to move freely at a lower temperature.
Match the following.List - I List - II (Monomer)A) Sucrosei) beta - D - Galactose and beta - D - GlucoseB) Cellulose ii) alpha - D - Glucose and beta - D - FructoseC) Starch iii) beta - D - GlucoseD) Lactoseiv) alpha - D - Glucose
a.A - i; B - ii; C - iii; D - iv
b.A - ii; B - i; C - iii; D - iv
c.A - ii; B - iii; C - iv; D - i
d.A - iv; B - iii; C - i; D - ii