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Desiccants (drying agents) can often be regenerated by heating. A desiccant that is commonly regenerated is
CaSO4?2H2O:
CaSO4?.2H2O(s) → CaSO4(s) + 2H2O(g)
?Ho = 25.1 kJ/mol; ?So = 69.3 J/molK
Regeneration is carried out at 250 oC.
a) What is the ?Go for this reaction?
The number of orbitals present in the shell with n= 4 is: (1) 16 (2) 8 (3) 18 (4) 32 Ans: 16
Why transition elements form interstitial compound
Principal quantum number of an atom represents : (1) Size of the orbital (2) Spin angular momentum (3) Orbital angular momentum (4) Space orientation of the orbital
Which one of the following configuration represents a noble gas: (1) 1s 2 , 2s 2 , 2p 6 , 3s 2 , (2)1s 2, 2s 2, 2p 6 , 3s 1 (3) 1s 2 , 2s 2 , 2p 6 ,
Typical conductometric titration curve for a weak aci and a strong base
Q. Taste interactions affecting taste quality? Taste interactions- Foods contain a mixture of substances which elicit all four sensations. Modification of one sensation takes p
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working of electrolysis process? components of electrolysis process? advantages and disadvantages of electrolysis process?
Q. A sample of water analysis was found to contain temporary magnesium hardness 25 mg/L. Permanent magnesium chloride hardness 15 mg/L and permanent calcium sulphate hardness 20
Being simultaneously basic and acidic, water undergoes autoprotolysis, also called self-ionization: The equilibrium constant is H3O+ in these equations is gene
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