The equilibrium Cr2O7 2- ↔ 2CrO42- is shifted to right in:
Correct answer: B. A basic medium
- A. An acidic medium
- B. A basic medium
- C. A neutral medium
- D. It does not exist
Explanation
The equilibrium ( text{Cr}_2text{O}_7{2-} leftrightarrow 2text{CrO}_4{2-}) involves the chromate (text{CrO}_4{2-}) and dichromate ( text{Cr}_2text{O}_7{2-} ) ions. In a basic medium, hydroxide ions ( OH- ) are present, which can react with the dichromate ion ( text{Cr}_2text{O}_7{2-}) to form chromate ions (text{CrO}_4{2-}), shifting the equilibrium to the right. This reaction occurs because the hydroxide ions act as a base, accepting a proton from the dichromate ion, converting it into chromate ion and water. Thus, option B is correct.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
Practise Transition Elements
531 free Transition Elements 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 Transition Elements questions
Which of the following metal exhibits more than one oxidation states:
Which of the following transition metal ions will have definite value of magnetic moment:
Which of following is a very powerful oxidant:
Bessemer's converter is used in the manufacture of:
The number of unpaired electrons in Ferrous ion (Z = 26) is:
Corrosion of iron can be prevented by coating the surface with: