Electronegativity

Q.
The correct order of stability of given carbocation is

1. C > A > D > B
2. D > B > C > A
3. A > C > B > D
4. D > B > A > C

Q.

When does or in which complex water act as strong field ligands and when weak field ligand..

Q. Which state of triply ionised beryllium (Be​​​​​3+)has the same orbital radius as that of the ground state of H-atom ?

Q.

Explain why cations are smaller and anions are larger than their parent atom.

Q.

What means Z effective ? Explain in simple way.

Q. The outermost electronic configuration of the most electronegative element is

1. $2s^{2}2p^3$
2. $2p^{2}2p^4$
3. $2s^{2}2p^5$
4. $3s^{2}3p^5$

Q. The correct order of increasing $X-O-X$ bond angle is $(X=H,F\text{or}Cl)$:

1. $F_{2}O>C{l}_{2}O>H_{2}O$
2. $C{l}_{2}O>H_{2}O>F_{2}O$
3. $H_{2}O>C{l}_{2}O>F_{2}O$
4. $F_{2}O>H_{2}O>C{l}_{2}O$

Q.

Which elements have the highest electronegativities on the periodic table?

Q. Which of the following compounds has the smallest bond angle?

1. $H_{2}O$
2. $N{H}_3$
3. $S{O}_2$
4. $H_{2}S$

Q. why bond angle decrease if electronegativity of central metal atom decrease?

Q. Why repulsion between The Lone pair and lone pair is so strong or The Lone pair and Bond pair is quite less than that from repulsion of that of lone pair and lone pair and that of the bond pair and Bond pair is very less repulsion between them all why is a person is ovarian between these all types of fonts please explain it briefly

Q.

How are minerals formed in igneous and metamorphic rocks?

Q. Noble gases are strongly soluble in water, owing to:

1. dipole - dipole interactions
2. dipole - induced dipole interactions
3. hydrogen bonding
4. induced dipole - instantaneous dipole interactions

Q. Sodium Chloride is an ionic compound where as hydrogen chloride is mainly covalent because

1. Sodium is less reactive
2. Hydrogen is non-metal
3. Hydrogen Chloride is a gas
4. Electro-negativity difference in the case of hydrogen and chlorine is more than 2 : 1

Q. Covalent radius of oxygen is 0.74 Å and its electronegativity is 3.5 . find effective nuclear charge experienced by oxygen?
Allred- Rochow electronegativityis given by $\chi =\frac{0.359Z_{eff}}{r^2}+0.744$
where $\chi$ is electronegativity, $r$= atomic radius, $Z_{eff}$ is effective nuclear charge

1. 5.2
2. 4.2
3. 0.65
4. 3.8

Q.

Non metals contain _______ number of electrons in their outermost shell.

1. 1, 2 or 3

2. 5, 6, 7 or 8

3. 10 to 18

4. 8, 9 or 10

Q. Among V2+ and V3+ which is stable?

Q.

Choose the minerals that are carried by veins and lodes :

1. Copper

2. Zinc

3. Sodium

4. Calcium

Q. Can f- act as strong field ligand and cause pairing of electron in Co(f6)3- ?

Q. Hyper conjugation is not possible in

1. $H_{3}C-CH=C{H}_2$
2. $H_{2}C=C{H}_2$
3. 
4. $(C{H}_3{)}_{2}C=C(C{H}_3{)}_2$

Q. Match the interhalogen compounds of column I with the shapes in column II and assign the correct code.

Column I	Column II
a. $X{X}^{\prime }$	(i) T-shape
b. $X{X}_3^{\prime }$	(ii) Pentagonal bipyramidal
c. $X{X}_5^{\prime }$	(iii) Linear
d. $X{X}_7^{\prime }$	(iv) Square pyramidal
	(v) Tetrahedral

1. $a-\left(iii\right),b-\left(iv\right),c-\left(i\right),d-\left(ii\right)$
2. $a-\left(iii\right),b-\left(i\right),c-\left(iv\right),d-\left(ii\right)$
3. $a-\left(v\right),b-\left(iv\right),c-\left(iii\right),d-\left(ii\right)$
4. $a-\left(iv\right),b-\left(iii\right),c-\left(ii\right),d-\left(i\right)$

Q. Which of the following has the smallest CH bond length among the following?

1. $CH{F}_3$
2. $CHC{l}_3$
3. $CHB{r}_3$
4. All have the same CH bond length

Q. Name the shape selective catalyst used in the petroleum industry.

Q.

Chlorine is the most electronegative of all elements.

1. True
2. False

Q.

What property of an element is measured by electronegativity?

Q.

______ bond is formed by the mutual sharing of electrons between the combining atoms of the atoms or different elements.

Q. Which of the following relation is correct?
$\text{(IE = Ionisation energy in eV/atom, EA = Electron affinity in eV/atom, EN = Electronegativity in Mulliken scale)}$

1. $\text{2IE - EA - EN = 0}$
2. $\text{2EN - IE - EA = 0}$
3. $\text{2EA - IE - EN = 0}$
4. $\text{EN - IE - EA = 0}$

Q.

On descending a group in the periodic table nuclear charge increases but electronegativity decreases.

Q. $H_{3}C-\stackrel{\oplus }{C}H-CH=C{H}_2$ does not involve:

1. $\sigma -\pi$ overlap
2. $p\pi -p\pi$ overlap
3. $p\pi -d\pi$ overlap
4. All of the above.

Q.

Name of a solid non-metal.