AIEEE 2003 | Periodic Table & Periodicity Question 158 | Chemistry

The atomic numbers of Vanadium (V), Chromium (cr), Manganese (Mn) and Iron (Fe), respectively, $$23,24,25$$ and $$26$$. Which one of these may be expected to have the higher second ionization enthalpy?

AIEEE 2003

MCQ (Single Correct Answer)

-1

Which one of the following is an amphoteric oxide?

Na₂O

SO₂

B₂O₃

ZnO

AIEEE 2003

MCQ (Single Correct Answer)

-1

The reduction in atomic size with increase in atomic number is a characteristic of elements of

$$d$$ - block

$$f$$ - block

Radioactive series

High atomic masses.

AIEEE 2002

MCQ (Single Correct Answer)

-1

$$C{e^{ + 3}},\,\,L{a^{ + 3}},\,\,P{m^{ + 3}}\,\,$$ and $$Y{b^{ + 3}}\,\,$$ have ionic radial in the increasing order as

$$L{a^{ + 3}}\,\, < C{e^{ + 3}}\,\, < P{m^{ + 3}}\,\, < Y{b^{ + 3}}$$

$$Y{b^{ + 3}}\,\, < P{m^{ + 3}}\,\, < C{e^{ + 3}}\,<\,L{a^{ + 3}}$$

$$L{a^{ + 3}}\,\, = C{e^{ + 3}}\,\, < P{m^{ + 3}}\,\, < Y{b^{ + 3}}$$

$$Y{b^{ + 3}}\,\, < P{m^{ + 3}}\,\, < L{a^{ + 3}}\,\, < C{e^{ + 3}}$$

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