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Question 1 NDE
G=H-TS
I. - G = enthalpy change
II. - H = Free energy change
III. - T = Temperature
IV. - S =entropy change
Which of the above statement is / are correct?
A
III and IV only
B
I and III only
C
II and IV only
D
IV only
Explanation

Chemical thermodynamics is the branch of chemistry that studies the relationship between heat, work, temperature, and energy in chemical reactions and physical transformations.
∆G=∆H-T∆S
Where H Implies Enthalpy meaning: The heat content of the system at constant pressure.
If ∆G > 0, the reaction is non-spontaneous
If ∆G = 0, The system is at equilibrium

Question 2 NDE
__________and _________are the metallic ions commonly present?
A
Al3+ and Ca2+
B
Na+ and Mg2+
C
Ca2+ and Zn2+
D
Cu2+ and Al3+
Explanation

A metallic ion is an atom of a metal that has lost one or more electrons and carries a positive charge.

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