NEET UG 2018 — Chemistry Inorganic Chemistry

2018mcqeasy

Among ${\mathrm{CaH}}_{2}, {\mathrm{BeH}}_{2}, {\mathrm{BaH}}_{2},$ what is the order of ionic character?

Official previous-year question

Held on 30 Apr 2018 · Verified 9 Jul 2026.

Options

A
${\mathrm{BeH}}_{2}<{\mathrm{BaH}}_{2}<{\mathrm{CaH}}_{2}$
B
${\mathrm{CaH}}_{2}<{\mathrm{BeH}}_{2}<{\mathrm{BaH}}_{2}$
C
${\mathrm{BeH}}_{2}<{\mathrm{CaH}}_{2}<{\mathrm{BaH}}_{2}$
D
${\mathrm{BaH}}_{2}<{\mathrm{BeH}}_{2}<{\mathrm{CaH}}_{2}$

Did you get this right?

Solution

${\mathrm{BeH}}_{2}<{\mathrm{CaH}}_{2}<{\mathrm{BaH}}_{2}$

The size of the elements follow the order: $\mathrm{Be}<\mathrm{Ca}<\mathrm{Ba}$

Smaller the size of cation, more will be its polarizing power. Thus, a higher polarization will lead to a greater covalent character, or the least ionic character. Hence, ${\mathrm{BeH}}_{2}$ will be least ionic. Top to bottom size of cation increase so covalent character decrease and ionic character increases.

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NEET UG 2018 — Chemistry Inorganic Chemistry

2018mcqeasy

Among ${\mathrm{CaH}}_{2}, {\mathrm{BeH}}_{2}, {\mathrm{BaH}}_{2},$ what is the order of ionic character?

Official previous-year question

Held on 30 Apr 2018 · Verified 9 Jul 2026.

Options

A
${\mathrm{BeH}}_{2}<{\mathrm{BaH}}_{2}<{\mathrm{CaH}}_{2}$
B
${\mathrm{CaH}}_{2}<{\mathrm{BeH}}_{2}<{\mathrm{BaH}}_{2}$
C
${\mathrm{BeH}}_{2}<{\mathrm{CaH}}_{2}<{\mathrm{BaH}}_{2}$
D
${\mathrm{BaH}}_{2}<{\mathrm{BeH}}_{2}<{\mathrm{CaH}}_{2}$

Did you get this right?

Solution

${\mathrm{BeH}}_{2}<{\mathrm{CaH}}_{2}<{\mathrm{BaH}}_{2}$

The size of the elements follow the order: $\mathrm{Be}<\mathrm{Ca}<\mathrm{Ba}$

NEET UG 2018 — Chemistry Inorganic Chemistry

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NEET UG Inorganic Chemistry in other years

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NEET UG 2018 — Chemistry Inorganic Chemistry

Options

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Solution

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NEET UG Inorganic Chemistry in other years

More NEET UG Inorganic Chemistry questions

Other Chemistry topics for NEET UG

Physical Chemistry

Organic Chemistry

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