JEE Main Chemistry question

Not in JEE Main or NEET syllabus

How many groups in periodic table are known as hydride gap?

Answer: 3

Solution

Groups 7, 8 and 9 (the central "triad" transition-metal groups, e.g. Mn/Tc/Re, Fe/Ru/Os, Co/Rh/Ir) do not

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Question ID VK-137483