+1 to 0
0 to +2
+2 to +1
0 to +1
Correct answer is A
No explanation has been provided for this answer.
When dissolved in water, NaOH flakes show
An endothermic change
An exothermic change
A slow reaction
A rapid reaction
Correct answer is B
No explanation has been provided for this answer.
The Arrhenius equation expresses the relationship between the speed of a reaction and its
Molecular collision
Heat of reaction
Catalyst
Activation energy
Correct answer is D
No explanation has been provided for this answer.
When H2S is passed into a solution of iron (III) chloride, the solution turns
Pale green
Pale red
Brown
Colourless
Correct answer is A
A reaction between Iron (iii) chloride and Hydrogen sulphide leads to the reaction
2FeCl3(aq) + H2S(g) → 2FeCl2(aq) + 2HCl(aq) + S(s)
The colour change is from REDDISH BROWN to PALE GREEN.
PCl5(g) ↔ PCl3(g) + Cl2(g)
In the reaction above, a decrease in pressure will
Decelerate the reaction
Increase the yield of PCl3
Increase the yield of PCl5
Accelerate the reaction
Correct answer is B
No explanation has been provided for this answer.