Explanation:
Bayer process is industrial method of the refining of the bauxite to produce alumina which is aluminum oxide.
As alumina is amphoteric in nature, it exhibits a higher solubility at both the extremes of pH range, it is possible to dissolve alumina in low as well as in high pH solutions.
Dissolution of the alumina at high pH is well recognized in Bayer process. Bauxite is digested in very <u>high pH solution (> 13) of alkali</u> like sodium hydroxide at temperature of about 150–250°C and pressure at 20 atm. <u>This is done so that the dissolved alumina is separated from rest of insoluble bauxite minerals. </u>
Answer:
is the correct choice that is option A.
Explanation:
An electron has 
times the mass of a proton, but an equal and opposite negative charge.
Lets 
is any element represented here.
Where 
is the number of protons as well as its atomic number.
And
is the mass number which is the number of protons and neutrons in any atom.
Note: We know that Hydrogen is devoid of neutron,so number of neutrons in a Hydrogen atom is zero.
Then
is also a representation of single proton.
So is the right choice that is option A.
Answer:
1.02 Hz
Explanation:
frequency= (1/t) = (1/0.98) = 1.02 hz
Answer:
Tenant farming is an agricultural production system in which landowners contribute their land and often a measure of operating capital and management, while tenant farmers contribute their labor along with at times varying amounts of capital and management.
Explanation:
