Covalent Bond vs Ionic Bond

Q.

Banana bond is:

1. 2-centre-2-electron bond

2. 2-centre-1-electron bond

3. 3-centre-2-electron bond

4. 2-centre-3-electron bond

Q.

What do the dextro and levo prefixes mean in Latin?

Q. Q.Asseration:Diamond and graphite do not have the same crystal structure. Reason: Diamond is crystalline while graphite is amorphous

Q. In polymeric (becl2)n there are A. Three centre four electron bonds B. Three centre three electrons bond C. Two centre two electrons bond D. Two centre three electrons bond

Q.

The correct order of decreasing polarizability of ion is _____.

1. > > >

2. > > >

3. > > >

4. > > >

Q. ntWhat is the bond order of SO32- between S-O and the bond order of NO3 between N-O?n

Q. 3 In BF3, the B-F bond length is 1.30 A, when BF3, is allowed to be treated with Me3N, it forms an adduct, (Me3N → BF3) The bond length of B-F inthe adduct is(1) Greater than 1.30(3) Equal to 1.30 (2) Smaller than 1.30 A(4) None of these

Q. F − (Fluorine) ion is having 10 electrons (9 + 1 = 10). Hence, the species which is isoelectronic with F^{-}F − must also have 10 electrons. It’s some isoelectronic species are i)Na^{+}Na + ion it is also having 10 electrons ( 11 – 1 = 10). ii)Ne ion it is also having 10 electrons. iii)Al^{3+}Al 3+ ion it is also having 10 electrons ( 13 – 3 = 10).

Q. 48.Which orbital is used by oxygen atom to form a sigma bond with other oxygen atom in O2 molecule

Q. Which one of the following set of ions represents the collection of isoelectronic species?
[Atomic numbers: F = 9; Cl = 17; Na = 11; Mg = 12; Al = 13; K = 19; Ca = 20; Sc = 21]

1. 
2. 
3. 
4. 

Q. hybrid orbitals used by cl atom in clo2

Q. 34. In diborane, the incorrect statement is: A) All 6 B--H bond are in the same plane B) 4 B--H bonds are on the same plane and two B--H bonds above and below the plane C) It is the 12 electron species D) Two BH3 are attached with three center electron pair bond

Q. If BCl bond has a dipole moment, explain why $BC{l}_3$ molecule has zero dipole moment.

Q.

How many electrons are transferred during following change?
2I^-_(aq) → I_{2 (s)}

1. 2 electrons

2. 1 electron

3. 4 electrons

4. 0 electrons

Q. Sodium was found to have a strong tendency to form $N{a}^{+}$ during ionic bond formation because:

1. It is the most electropositive element
2. Sodium has strong metallic bonding
3. It has the tendency to attain the nearest noble gas electronic configuration of Neon $\left(Ne\right)$.
4. None of the above

Q.

Paragraph for below question
नीचे दिये गये प्रश्न के लिए अनुच्छेद

Molecular orbital theory was developed by F. Hund and R. S. Mulliken in 1932. As per this theory, the atomic orbitals of comparable energies and proper symmetry combine to form molecular orbitals. When two atomic orbitals combine, two molecular orbitals one bonding and other antibonding molecular orbitals are formed. The electron density in a bonding molecular orbital is located between the nuclei of the bonded atoms while in the case of antibonding molecular orbital, most of the electron density is located away from the space between the nuclei. Molecules containing unpaired electron(s) in molecular orbitals are paramagnetic in nature.

अणु कक्षक सिद्धान्त 1932 में एफ. हुण्ड तथा आर. एस. मुलिकन द्वारा दिया गया था। इस सिद्धान्त के अनुसार, तुलनीय ऊर्जा तथा उचित सममिति वाले परमाणु कक्षक संयोग करके आणविक कक्षक बनाते हैं। जब दो परमाणु कक्षक संयोग करते हैं, तो दो आणविक कक्षक बनते हैं जिनमें एक आबंधी आणविक कक्षक तथा दूसरा प्रतिआबंधी आणविक कक्षक होता है। आबंधी आणविक कक्षक में इलेक्ट्रॉन घनत्व बंधित परमाणुओं के नाभिकों के मध्य में स्थित होता है जबकि प्रतिआबंधी आणविक कक्षक में अधिकांश इलेक्ट्रॉन घनत्व नाभिकों के मध्य स्थान से दूर स्थित होता है। आणविक कक्षकों में अयुग्मित इलेक्ट्रॉन वाले अणु अनुचुम्बकीय प्रकृति के होते हैं।

Q. Paramagnetic species among the following is

प्रश्न - निम्नलिखित में से अनुचुम्बकीय स्पीशीज है

1. C₂
2. $O_2^{+}$
3. $O_2^{2-}$
4. $C_2^{2-}$

Q.

In the following metals which one has lowest probable interatomic forces

1. Copper

2. Silver

3. Zinc

4. Mercury

Q.

Which bond among the following has the shortest bond length?

1. C - C

2. C = C

3. All of these have the same bond length

4. 

Q. 10. Use the molecular orbital energy level diagram to show that N2 would be expected to have a triple bond

Q. 9 Xenon crystallizes as FCC lattice and its edge length is 620 pm , calculate the distance between nearest neighbours and radii of xenon atom.

Q. Which species has 90° bond angle(s)? 1)CO3²- 2)PCl3F2. 3) SiCl4. 4) IF5

Q. How many moles of electron weigh seven kilogram?

Q. Differentiate bonding and antibonding molecular orbitals

Q. Why is energy released when new bonds are formed ?

Q. number of c atoms which present linearly in vinyl acetylen

Q. What is partial double bond character Who can show partial double bond character

Q. Which pair of species does not exist?

किस युग्म की स्पीशीज का अस्तित्व नहीं होता?

1. He₂ and H₂
   
   He₂ एवं H₂
2. $H{e}_{2}and{H}_2^{2-}$
   
   $H{e}_2$ एवं $H_2^{2-}$
3. F₂ and B₂
   
   F₂ एवं B₂
4. O₂ and F₂
   
   O₂ एवं F₂

Q. In which of the following species bonds are non-directional?

1. $NC{l}_3$
2. $RbCl$
3. $BeC{l}_2$
4. $BC{l}_3$

Q.

The types of bond present in NH₄Cl are:

1. Ionic, covalent and coordinate

2. Ionic and covalent

3. Ionic and coordinate

4. Ionic

Q.

The correct order of C-O bond length among CO, CO₃^2-and CO₂ is

1. CO<CO₂<CO₃^2-

2. CO₃^2-< CO₂<CO

3. CO₂<CO₃^2-<CO

4. CO<CO₃^2-<CO₂