Trend in Electronegativity

Q.

The mass percentage of ${Fe}^{+3}$ ion present in $F{e}_{0.93}{O}_{1.0}$ is?

1)15%.

2) 5.5%.

3) 10%.

4) 11.5%

Q. Correct order of electronegativities of N, P, C and Si is:

1. N > P > C > Si
2. C > Si > N > P
3. N < P < C < Si
4. N > C > P > Si

Q.

Why is BiH₃ the strongest reducing agent amongst all the hydrides of

Group 15 elements?

Q.

What is the mass percentage of Fe3+ ion present in Fe(0.93)O?

Q.

Which halogen shows an oxidation state of -1 only?

1. Fluorine

2. Bromine

3. Iodine

4. Chlorine

Q. Which of the following properties generally decreases along a period ?

1. Ionization Energy
2. Metallic Character
3. Electron Affinity
4. Valency

Q.

Trick to find oxidation state of elements in redox reactions

Q. $P{b}^{4+}$ is less stable than $P{b}^{2+}$. This is due to:

1. Poor shielding of $6f^{14}$ electrons by inner electrons
2. Poor shielding of $6s^2$ electrons by inner $d$ and $f$ electrons
3. Poor shielding of $6p^2$ electrons by inner $s$ and $f$ electron
4. Poor shielding of $5d^{10}$ electrons by inner $f$ electrons

Q. Why NO acts as a three electron donor?

Q. This question refers to the elements of the periodic table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but letters are not the usual symbols of the elements.

Which of these:
(a) are most electronegative element?

$\begin{array}{cccccccc}3& 4& 5& 6& 7& 8& 9& 10\\ A& B& C& D& E& F& G& H\\ 11& 12& 13& 14& 15& 16& 17& 18\\ I& J& K& L& M& N& O& P\end{array}$

Q. Pauling scale of electronegativity is obtained from Mulliken's scale by

1. 
   Multiplying Mulliken value by 2.8
2. 
   Dividing Mulliken value by 2.8
3. 
   By adding 2.8 to Mulliken value
4. 
   By substracting 2.8 from Mulliken value

Q.

What is the name of the ionic compound ${\mathrm{Na}}_3{\mathrm{AlF}}_6$?

Q. The correct order of electronegativity on Pauling scale is:

1. $F>CI>O>S$
2. $Li>Na>K>Rb>Cs$
3. $Be<B<N<C$
4. Both (A) and (B)

Q.

If the ionization enthalpy and electron gain enthalpy of an element are 275 Kcal/mole and 86 Kcal ${mol}^{-1}$ respectively, then the electro negativity of the element on mulliken scale is

1. 2.8

2. 0.0

3. 4.0

4. 2.6

Q.

Electronegativity generally increases down the group.

1. True

2. False

Q. In Sodium atom, the screening of $3s$ electron is due to:

1. $3s^2,3p^6$
2. $4s^1$
3. $1s^2,2s^2,2p^6$
4. $3s^1$

Q.

In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is:

1. Ionization enthalpy

2. Electronegativity

3. Atomic radius

4. Electron gain enthalpy

Q. Among Ne and O which one has a higher radius?

Q. Name the type of elements which have their,
(i) outermost shell complete

Q. 65.If alpha=50% for Al2(SO4)3, then what is the vant hoff factor?

Q. Q.How to find strong ligand and weak ligand

Q. 40. d4 to d7 co ordination entities are more stable for strong field as compared to weak field cases(in case of octahedral complexes) Why? And how?

Q. Which electronic level would allow the hydrogen atom to absorb a photon but not to emit a photon

1. 3s
2. 2p
3. 2s
4. 1s

Q. The cause of diagonal relationship is:

1. Similar polarizing power of ions.
2. Similar electronegativities.
3. Similar ionic or atomic radii.
4. All the three.

Q.

The element which has the least ionization potential is:

1. Aluminium

2. Chlorine

3. Sodium

4. Sulphur

Q.

Which of the following element has highest electron-gain enthalpy?

1. Oxygen

2. Neon

3. Chlorine

4. Fluorine

Q.

Why do Halogens decrease in reactivity?

Q.

Which of the following elements represent highly electro positive as well as highly electro negative element in its period?

1. Hydrogen

2. Nitrogen

3. Fluorine

4. None

Q. Considering the elements $F,Cl,O\text{and}S$, the correct order of their electron affinity values is:

1. $F>Cl>O>S$
2. $Cl>F>S>O$
3. $O>F>S>Cl$
4. $F>O>Cl>S$

Q.

Why is ${\mathrm{PCl}}_5$ more covalent than ${\mathrm{PCl}}_3$?