Which one of the following is not redox reaction?
Correct answer: B. B
- A. A
- B. B
- C. C
- D. D
Explanation
The reaction MgO + 2H2O → MgCl2 + 2H2O is a double displacement reaction. A double displacement reaction is a chemical reaction in which two compounds exchange their ions to form two new compounds. In this reaction, magnesium oxide (MgO) and water (H2O) exchange their ions to form magnesium chloride (MgCl2) and two water molecules (H2O). The reaction can be broken down into two steps: Magnesium oxide reacts with water to form magnesium hydroxide (Mg(OH)2): MgO + H2O → Mg(OH)2 Magnesium hydroxide reacts with hydrochloric acid (HCl) to form magnesium chloride and water: Mg(OH)2 + HCl → MgCl2 + H2O
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrochemistry
Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
Practise Electrochemistry
696 free Electrochemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrochemistry questions
On the basis of knowledge of electrochemical series, which reaction is not feasible:
The cathode has the reduction potential:
How much current is necessary to produce H2 gas at the rate of 1 cm3 per second under STP?
In electrochemical cells, reduction takes place at:
Which of the following process represents disproportionation?
Which reaction does not involve either in oxidation or reduction?