Trend in Electronegativity

Q. In hydrogen atom energy of electron in 2nd Bohrs orbit is -3.4 eV. The KE of electron in this orbit

Q. No of gram atoms present in 288g of sulphur

Q.

Which transition of electron in the hydrogen atom emits maximum energy?

1. 

2. 

3. 

4. 

Q.

Which of the following has the highest first ionization energy?

1. C

2. Li

3. Be

4. B

Q.

An atom with high electronegativity has

1. Low electron affinity
2. Large size
3. Low ionization potential
4. High ionization potential

Q. when the size of cation decreases why the covalent character increases?

Q. The hybridizations of central atom in SO2 and CO2 are respectively

Q. How AlCl3, BCl3 & NH3 are electron deficient species?

Q. 27.which has more stronger conjugate base H2S OR H2O and why?

Q.

What is the correct order of electronegativity?

1. $M^{1-}$ < $M^{2-}$ < $M^{3-}$ < $M^{4-}$

2. $M^{1-}$ > $M^{2-}$ > $M^{3-}$ > $M^{4-}$

3. $M^{1-}$ < $M^{2-}$ < $M^{3-}$ < $M^{4-}$

4. $M^{4-}$ < $M^{2-}$ < $M^{3-}$ < $M^{1-}$

Q.

Electronegativity generally increases along a period from Left to Right.

1. True

2. False

Q.

The correct order regarding the electro negativity of hybrid orbital's of carbon is

1. sp<sp²<sp³

2. sp>sp²>sp³

3. sp>sp²<sp³

4. sp<sp²> sp³

Q. why CO2 is not a reducing agent

Q. the number of gram atoms in 3.2gm of Ca is

Q. why SF4 is electron deficient species , it should have ten electrons ? why it acts as lewis acids

Q. Why are electrons added or liberated added to neutral gaseous atom in electron affinity and ionization energy respectively?

Q. Which of the following are applications of electronegativity?

1. Prediction of polarity in a molecule
2. Predicting basic nature or acidic nature of oxides
3. Strength of the bond
4. all of the above

Q. 18. How many H2 atom are contained in 1.50g of glucose

Q. Which of the follwing properties of Li and Mg is/are similar?

1. Size
2. Electronegativity
3. Similar chemical properties
4. All of the above

Q.

Fluorine has the highest electronegativity among the $n{s}^{2}n{p}^5$ group on the Pauling scale, but the electron affinity of fluorine is less than that of chlorine because-

1. (a)The atomic number of fluorine is less than that of chlorine.

2. (a)Fluorine being the first member of the family behaves in an unusual manner.

3. (a)Chlorine can accommodate an electron better than fluorine by utilizing its vacant 3d=orbital.

4. (a)Small size, high electron density and an increased electron repulsion makes addition of an electron to fluorine less favourable than that in the case of chlorine.

Q. Difference between the number of protons in the largest element of 4th period and the smallest element of third period is

Q. 13 EXPLAIN THE STRUTURE OF NCO+ ION.

Q. 57 What is meant by inert pair effect, noble gas kernel, oxidation state

Q. The number of unpaired electrons in a paramagnetic diatomic molecule of an element withatomic number 16 is

Q. In hydrogen atom energy of electron in 2nd Bohrs orbit is -3.4eV. The kinetic energy of electron in this orbit is 1)-3.4eV 2)+3.4eV 3)-6.8eV 4)+1.7eV

Q.

Arrange F, Cl, O, and N in the decreasing order of electronegativity.

1. O > F > N > Cl

2. F > N > Cl > O

3. Cl > F > N > O

4. F > O > N > Cl

Q. 40. The no. Of gram atoms present in 10 gms of CaCO3 is _______

Q. Which of the following is the least stable?

1. $Pb{I}_4$
2. $C{I}_4$
3. $Ge{I}_4$
4. $Sn{I}_4$

Q.

How would you react to the statement that the electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?

Q. find second excitation energy of Li^2+ ion