Fluorine does not occur in the free state in nature because
it is a poisonous gas
it belongs to the halogen family
it is inert
of its high reactivity
Correct answer is D
No explanation has been provided for this answer.
In a chemical reaction, the change in concentration of a reactant with time is
entropy of reaction
enthalpy of reaction
rate of reaction
order of reaction
Correct answer is C
No explanation has been provided for this answer.
Equilibrium constant is very large
∆H - T∆S = O
∆ H > T ∆ S
Equilibrium constant is less than zero
Correct answer is A
No explanation has been provided for this answer.
+2081 Jmol-1
-2081 Jmol-1
-649 Jmol-1
+649 Jmol-1
Correct answer is A
∆G = ∆H - T∆S
-899 = ∆H - 2980
∆H = -899 + 2980 = + 2081 Jmol-1
How many faraday of electricity is required to produce 0.25 mole of copper?
1.00F
0.01F
0.05F
0.50F
Correct answer is D
Cu → Cu2+ + 2e
1mole Cu requires 2f
0.25 mole Cu requires x
x = 0.25x2/1 = 0.50f