JEE Main 2022 (Online) 27th June Evening Shift | d and f Block Elements Question 28 | Chemistry

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JEE Main 2022 (Online) 27th June Evening Shift

MCQ (Single Correct Answer)

-1

The 'f' orbitals are half and completely filled, respectively in lanthanide ions

[Given : Atomic no. Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70; Dy, 66]

Eu²⁺ and Tm²⁺

Sm²⁺ and Tm³⁺

Tb⁴⁺ and Yb²⁺

Dy³⁺ and Yb³⁺

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

-1

The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?

Ce (At. No. 58)

La (At. No. 57)

Lu (At. No. 71)

Gd (At. No. 64)

JEE Main 2022 (Online) 25th June Evening Shift

MCQ (Single Correct Answer)

-1

The metal ion (in gaseous state) with lowest spin-only magnetic moment value is

V²⁺

Ni²⁺

Cr²⁺

Fe²⁺

JEE Main 2022 (Online) 25th June Evening Shift

MCQ (Single Correct Answer)

-1

During halogen test, sodium fusion extract is boiled with concentrated HNO₃ to

remove unreacted sodium

decompose cyanide or sulphide of sodium

extract halogen from organic compound

maintain the pH of extract.

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