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Which of the following is not a property of cobalt?(a) Cobalt is a lustrous white metal(b) It is attacked by alkalies(c) Cobalt is malleable(d) Cobalt is ductileI have been asked this question in an online quiz.My question is based upon Non-Ferrous Metals and Alloys topic in division Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

Answer» RIGHT option is (b) It is attacked by alkalies

The best explanation: Cobalt is a LUSTROUS white METAL which is not attacked by alkalies. Cobalt is DUCTILE and malleable. The specific GRAVITY of cobalt is 8.8.


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