Q19 / 105 · NTA Abhyas (JEE Main) 2020 · Chemistry · d and f Block Elements

How many of the following are lanthanides?
Uranium, praseodymium, erbium, gadolinium, curium, hafnium, osmium, iridium

Correct answer: 3

Solution

Praseodymium

(Pr),

erbium

(Er)

and gadolinium

(Gd)

are lanthanoids.

Hence, the correct answer is 3.

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