Jee main q.no 2) code c on coordination chemistry, I got option 1 but CBSE answer key says that the answer is 2) I found a solution that supports my answer. Is it correct can I challenge this answer key?
Ammonia forms the complex with copper ions in alkaline solution but not in acid solution. The reason for it is:
(1) in alkaline solution is precipitated which is soluble in excess of alkali.
(2) copper hydroxide is amphoteric.
(3) in acidic solution hydration protects ions.
(4) in acidic solution protons coordinates with ammonia molecule forming ions and molecules are not available.
B-2. Which of the following names is impossible ?
(A) Potassium tetrafluoridooxidochromate (Vl) (B) Barium tetrafluoridobromate (lll)
(C) Dichlorobis (urea) copper (ll) (D) All are impossible
Jee main q.no 2) code c on coordination chemistry, I got option 1 but CBSE answer key says that the answer is 2) I found a solution that supports my answer. Is it correct can I challenge this answer key?
(a) 287 x 10-3 (b) 143.5 x 10-3 (c) 143.5 x 10-2 (d) 287 x 10-2
10. Excess of silver nitrate solution is added to 100 mL of 0.01 M pentaaquachlorochromium (III) chloride solution. The mass of silver chloride obtained ( in gram ) is [Atomic mass of silver is 108]
[KCET 2011]
(a) 287 x 10-3 (c) 143.5 x 10-3
(b) 143.5 x 10-2 (d) 287 x 10-2