Ionic Bond

Q. the correct set of four quantum number for the valence electron of potassium is atomic no of K=19

Q. Is there a difference between gram atom and mole?

Q. how many atoms of H and S are contained in 0.40 mole of H2S

Q. 77.How many electrons in a atom with atomic number 105 can have (n+l) =8 How many electrons in a atom with atomic number 105 can have (n+l) =8

Q.

Among the following bonds, the most ionic bond is formed between:

1. H and Cl

2. Cs and Cl

3. C and Cl

4. Al and Cl

Q.

Silicon dioxide is:

1. Ionic in nature

2. None of these

3. Polar in nature

4. Covalent in nature

Q.

Laissaigne's extract is made to:

1. Convert ionic compounds to covalent compounds

2. Convert covalent compounds to ionic compounds

3. Dissolve the compound

4. None of these

Q. 74 A hydrogen like system has ionization energy 11808kJ/mol. Find number of proton in nucleus of that system.

Q. In a diatomic molecule the bond distance is 1 x 10^{-8} cm. Its dipole moment is 1.2 D. What is the fractional electronic charge on each atom?(a) 0.50(c) 0.25(b)1.2×10^{-10}(d)1.

Q.

Which of the following molecules will have smallest bond length?

1. H-Br

2. H-I

3. H-F bond

4. H-Cl

Q. Calculate concentration of H^+ ions in a mixture of 0.02 M acetic acid and 0.2 sodium acetate .given that the ionization cons†an t K_a for acetic acid is 1.8 ×10^-

Q.

Which is generally true about ionic compounds ?

1. Have low boiling point

2. Have low melting point

3. Soluble in non polar solvents

4. Conduct electricity in the fused state

Q. Electrovalent compounds have low melting point low boiling point Insoluble in polar solvent conduct electricity in fused state

Q.

A force which binds atoms of same or different elements by mutual sharing of electrons is called:

1. Covalent bond

2. Ionic bond

3. Co-ordinate bond

4. Hydrogen bond

Q. write formal charges of the atoms in the nitrite ion

Q. 7. 20g of an acid furnishes 0.5 moles of hydronium ions in its aqueous solution. The weight of 1g equivalent of the acid will be?

Q. the first excited state of Cl^- ion will have degeneracy of

Q. Which of the following compounds contain both ionic and covalent bonds 1)CH2Cl2 2)CHCl3 3)NaClO4 4)PCl3

Q. 48. Atom A present on corner, B present on face centre, C present on body centre and D present on edge centre.It all the atom touching one of the 2 fold, 3 fold and 4 fold symmetry are removed.what is the formula of A, B, C and D.

Q. 16. The geometry of electron pairs around S in SF6 is 1. Octahedral 2. Trigonal bipyramidal 3.square pyramidal 4.pentagonal planner.

Q. how many ways a bond between two atoms can cleave? 1.one 2. five 3.three 4. four

Q. The maximum number of 180^0 angle possible between X-M-X bond for compounds with sp3d2 and sp3d hybridisation respectively are

Q.

Most ionic compounds have _____

1. High melting and low boiling points

2. High melting point and non-directional bonds

3. High solubilities in polar solvents and low solubilities in non-polar solvents

4. 3D network structures and are good conductors of electricity in molten state

Q. TOTAL NO OF UNPAIRED ELECTRONES IN NO2 ? A.1 B.2 C.3 D.4

Q.

The formation of a chemical bond is accompanied by:

1. Sometimes increase and sometimes decrease in energy

2. Increase in energy

3. Neither increase nor decrease in energy

4. Decrease in energy

Q. 6.How CCl4 and CF4 are organic compound ?

Q. Q16. A compound has following composition Na 14, 13%, S = 9.978&, O=69.5% and H 6.22% Calculatemolecular fomula of compound assuming that whole hydrogen in the compound is present as water ofcrystallis ation. (Molecular mass of compound is 322)

Q. Which process takes place on chemical bond formation : (a) Decrease is energy (b) Increase in energy (c) No change in energy (d) Attractive and repulsive forces are equal

Q. Given below are two statements:
Statement I: Frenkel defects are vacancy as well as interstitial defects.
Statement II: Frenkel defect leads to colour in ionic solids due to presence of F-centres.
Choose the most appropriate answer for the statements from the options given below:
(JEE Main 2021)

1. Both Statement I and Statement II are false
   
2. Both Statement I and Statement II are true
3. Statement I is false but Statement II is true
4. Statement I is true but Statement II is false

Q. 47.If the molar concentration of PBI2 is .0015 mol/litre the concentration of iodide ions in g ion/litre is