MCQOPTIONS
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| 1. |
The retardation can be done by adding _________ |
| A. | Phenyl- α – napthylamine |
| B. | Phenyl -β – napthylamine |
| C. | Benzine- α – napthylamine |
| D. | Benzine – α – napthylamine |
| Answer» C. Benzine- ‚âà√≠¬¨¬± ‚Äö√Ñ√∂‚àö√ë‚àö¬® napthylamine | |