Tag: trends in periodic table

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Questions Related to trends in periodic table

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

On the Mulliken scale, the average of ionization potential and electrons affinity is known as _____(electronegativity/affinity).

  1. electronegativity

  2. electroneaffinity

  3. electropositivity

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

On Mulliken scale, the average of ionization potential and electrons affinity is known as electronegativity.

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

If the E.N. value of Nitrogen in the pauling scale is 3.0, then he value in mulliken scale will be

  1. $11.2$
  2. $22.4$
  3. $8.4$
  4. $3.0$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Mulliken electronegativity (M) is related to the Pauling scale (P) by the approximate relation M = 2.8 * P^2 + 0.77 * P, or more commonly in introductory chemistry, M = 2.8 * P. Using the standard conversion factor of 2.8, 3.0 * 2.8 = 8.4.

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

Which of the following is the correct order of hydrated radii?

  1. $Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$
  2. $Rb^{+} < Na^{+} < Li ^{+} < Cs^{+} < K^{+}$
  3. $Cs^{+} < Rb^{+} < K^{+} < Na ^{+}< Li^{+}$
  4. $Li^{+} < K^{+} < Na^{+} < Rb ^{+} < Cs ^{+}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Smaller alkali metal cations have a higher charge density and thus attract more water molecules, resulting in a larger hydrated radius. Therefore, lithium ion, being the smallest, has the largest hydrated radius, while cesium has the smallest.

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

Electronegativity of $F$ on Pauling's scale is 4.0. The value on Mulliken's scale is:

  1. $11.2$
  2. $14.4$
  3. $16.8$

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mulliken proposed that the arithmetic mean of the first ionization energy (I) and the electron affinity (Eea) should be a measure of the tendency of an atom to attract electrons.
$X= \dfrac{E _i + E _{Ea}}{2}$
Electronegativity of $F$ on Mulliken's scale is hence $11.2$

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

EN(mulliken scale) of the element (A) is $E _1$ and IP is $E _2$. Hence, EA will be:

  1. $2E _1 - E _2$
  2. $E _1 - E _2$
  3. $E _1 - 2E _2$
  4. $(E _1 + E _2)/2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As we know,
$\displaystyle EN = \frac{(IP) + (EA)}{2}$ 


$EA = 2 EN - IP$

$EA = 2E _1 - E _2$

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

The ionic radii of ${Rb}^{+}$ and ${I}^{-}$ are $1.46$ and $2.16$ $\mathring { A } $, respectively. The most probable type of structure exhibited by it is

  1. $CsCl$ type
  2. $NaCl$ type
  3. $ZnS$ type
  4. $Ca{F} _{2}$ type
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The radius ratio is calculated as r+/r- = 1.46 / 2.16 = 0.676. A radius ratio between 0.414 and 0.732 indicates an octahedral coordination geometry, which corresponds to the NaCl crystal structure.

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

Which pair of element has almost identical electronegativity values?

  1. $In,Tl$
  2. $B,Al$
  3. $B,Ga$
  4. $Al,Tl$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Both have close IE and electron affinity values(both are metals) and hence similar electronegativity values.
$Electronegativity=\dfrac{IE+EA}{2}$

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

Mulliken scale of elecrtonegativity uses the concept of:

  1. E. A. and EN of pauling

  2. E.A. and atomic size

  3. E.A. and I.P.

  4. E.A. and bond energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mulliken proposed that the arithmetic mean of the first ionization energy and the electron affinity should be a measure of the tendency of an atom to attract electrons.

Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

If the ionisation potential is IP, electron affinity is EA and electronegativity is x then which of the following relation is correct.

  1. 2X-EA-IP=0

  2. 2EA-X-IP=0

  3. 2IP-X-EA=0

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Electron affinity: The amount of energy released when an electron is added to the outermost shell of one mole of an isolated gaseous atom in its lower energy state.

Ionisation energy: Minimum energy required to remove most loosly held outer most shell e – in ground state from an isolated gaseous atom is known as ionisation potential.

$\displaystyle X= \frac{IP+EA}{2}$

$2X-IP-EA=0$
Multiple choice chemistry classification of elements- the periodic table periodic trends in physical properties properties and trend trends in periodic table electronic configuration and valency electron configuration

Electronegativity of F on Pauling scale is 4.0. Its value on Mulliken scale is__________.

  1. 12.35

  2. 11.0

  3. 15.2

  4. 14.2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Electronegativity of F on Pauling scale is 4.0. Its value on Mulliken scale is 11.2
$\displaystyle \chi (Pauling) = 0.34 \chi (Mulliken) -0.2 $
$\displaystyle 4.0 = 0.34\chi (Mulliken) -0.2 $
$\displaystyle \chi (Mulliken) = 12.35 $