Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 58

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The electronegativities of acetylene, ethylene and ethane are in the order:

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Important Questions on Classification of Elements and Periodicity in Properties

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-1>Q 8

Explain why cations are smaller and anions larger in radii than their parent atoms.

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-1>Q 34

Size of isoelectronic species

F^{-}, Ne

and

{Na}^{+}

is affected by

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-1>Q 38

The first ionisation enthalpies of

Na, Mg, Al

and

Si

are in the order:

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-2>Q 8

When the following five anions are arranged in the order of decreasing ionic radius, the correct sequence is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-2>Q 15

An element belonging to

3 d

series of modern periodic table has spin magnetic moment

= 5.92 B . M

. in

+ 3

oxidation state. Determine the atomic number of element.

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-2>Q 17

How many of the following have greater $Z_{eff}$ than Silicon atom:

(i) $Na$ (ii) $Mg$ (iii) $Al$ (iv) $P$ (v) $Cl$ (vi) $S$ (vii) $N$ (viii) $O$ (ix) $F$

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-1>Q 41

Among halogens, the correct order of amount energy released in electron gain (electron gain enthalpy) is

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-1>Q 42

Which of the following will have the most negative electron gain enthalpy and which the least negative?

F, P, S, Cl .