Ammonia forms the complex ion [Cu(NH 3 ) 4 ] 2+ with copper ions in alkaline solutions…
Chemistry · JEE Main · NTA Exams — d- and f-Block Elements
Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it ?
- In acidic solutions protons coordinate with ammonia molecules forming NH4+ ions and NH3 molecules are not available
- In alkaline solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali
- Copper hydroxide is an amphoteric substance
- In acidic solutions hydration protects copper ions
Answer
(A) In acidic solutions protons coordinate with ammonia molecules forming NH 4 + ions and NH 3 molecules are not available
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Choose the correct statements from the following. A. Mn 2 O 7 is an oil at room temperature. B. V 2 O 4…
- Which of the following transition elements has completely filled d orbitals (the d 10 configuration)
- Which of the following is not true about the transition elements ?
- Which of the following ions will exhibit colour in aqueous solutions?
- Which of the following ions possesses the maximum number of unpaired electrons ?
- Corrosion of iron can be prevented by coating the surface with
- Which of the following is not formed when H 2 S reacts with acidic K 2 Cr 2 O 7 solution?
- In following pairs, the one in which both transition metal ions are colourless is: (JEE Main 2022)
More d- and f-Block Elements questions · Browse all practice questions