Question 52. Match List I with List II.
| LIST I (Substances) | LIST II (Element Present) |
|---|---|
| A. Ziegler catalyst | I. Rhodium |
| B. Blood pigment | II. Cobalt |
| C. Wilkinson catalyst | III. Iron |
| D. Vitamin \mathrm{B}_{12} | IV. Titanium |
Choose the correct answer from the options given below.
(1) A-II, B-IV, C-I, D-III
(2) A-II, B-III, C-IV, D-I
(3) A-III, B-II, C-IV, D-I
(4) A-IV, B-III, C-I, D-II
Answer: (4)
Explanation:
Ziegler catalyst contains Titanium. Blood pigment contains Iron.
Wilkinson catalyst contains Rhodium.
Vitamin \mathrm{B}_{12} contains Cobalt.
So the correct matching is: A-IV, B-III, C-I, D-II.