Identify the group which is not a Dobereiner triad

Identify the group which is not a Dobereiner triad

Q. Identify the group which is not a Dobereiner triad

A.            Li, Na, K       

B.            Be, Mg, Cr       

C.            Ca, Sr, Ba      

D.            Cl, Br, I

Answer: Be, Mg, Cr       

Gkseries: Gkseries.com is a premier website to provide complete solution for online preparation of different competitive exams like UPSC, SBI PO, SBI clerical, PCS, IPS, IAS, IBPS PO, IBPS Clerical exam etc. & other graduate and post-graduate exams. Learn more on about us page