Chemistry Chemical Bonding Online Mcqs Test

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Question 1

1. H-bonding is not present in

Answer

Hydrogen sulphide

Answer

Hydrogen fluoride

Question 2

2. Anti-bonding MO is formed by

Answer

Addition of atomic orbitals

Answer

None of these

Answer

Multiplication of atomic orbitals

Answer

Subtraction of atomic orbitals

Question 3

3. When 2 lone pair and 2 bond pair are around the central atom reduction in the bond angle is up to. (in degrees)

Question 4

4. Which of the following is the correct electron – dot formula of CO₂?

Question 5

5. Fluorine has an atomic number 9 and Chlorine has 17. Which one has the highest electron affinity?

Answer

Both are equal

Answer

Cannot be determined

Question 6

6. Maximum hydrogen bonds in water are,

Question 7

7. The number of anti-bonding electron pairs in O₂²¯ molecular ion on the basis of MOT is

Question 8

8. The shape of H₃O⁺ is

Answer

Triangular planar

Answer

Tetrahedral

Question 9

9. Which of the following has zero depolemoment?

Question 10

10. Unit of dipole moment is

Question 11

11. Azimuthal quantum number of last electron of ₁₁Na is

Question 12

12. Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers l = 1 and l = 2 are respectively

Question 13

13. Geometry of simple molecule having SP³ hybrid orbital is

Answer

Tetrahedral

Answer

Square planner

Answer

Triangular

Question 14

14. A molecule in which sp² hybrid orbitals are used by the central atom in forming covalent bonds is

Question 15

15. The de-Broglie wavelength of a particle with mass 1 g and velocity 100 m/s is

Answer

6.63 x 10¯³³ m

Answer

6.65 x 10¯³⁵ m

Answer

6.63 x 10¯³⁴ m

Answer

6.63 x 10¯³⁵ m

Question 16

16. Which of the following element’s outermost orbits last electron has magnetic quantum number m = 0?

Question 17

17. Which of the following statements about positive ions is incorrect?

Answer

They are smaller than the atoms from which they were formed

Answer

They are larger than the atoms from which they were formed

Answer

They are also known as cations

Answer

They are formed when electros are formed from atoms

Question 18

18. The central atom in BrF₅ has _?_ bonding pairs of electrons and _?_ non-bonding pairs of electrons.

Question 19

19. How many sigma and pi bonds are present in tetra cyano ethylene?

Answer

Eight σ and eight π

Answer

Five π and nine σ

Answer

Nine σ and seven π

Answer

Nine σ and nine π

Question 20

20. Which hydrogen halide among the following has the highest percentage of ionic character?

Question 21

21. The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1 : 1 is

Answer

Vaporization

Answer

Colour spectrum

Answer

Distillation

Answer

Crystallization

Question 22

22. Lewis acids are

Answer

No such acids exist

Answer

Electron deficient

Answer

Electron rich

Answer

Octet is complete

Question 23

23. Which of the following will have highest value of electron affinity

Question 24

24. On sp3 hybridization

Answer

One s and 3 p-orbitals are involved

Answer

All p-orbitals are involved

Answer

One p-orbital is involved

Answer

Four p-orbitals are involved

Question 25

25. Inter molecular forces in solid hydrogen are

Answer

Hydrogen bonds

Answer

All of these

Answer

Covalent forces

Answer

Van der Waal forces or London dispersion forces

Question 26

26. In CCl₄, the four valencies of carbon are directed towards the corners of a

Answer

Tetrahedron

Question 27

27. Which one of these is weakest?

Answer

Ionic bond

Answer

Metallic bond

Answer

Covalent bond

Answer

Van der Waal’s forces

Question 28

28. Molecular orbitals are filled according to

Answer

Pauli’s exclusion principle

Answer

Hund’s rule

Answer

Aufbau principal

Question 29

29. The electronegativity of elements in a period from left to right

Answer

First decreases then increases

Answer

First increases then decreases

Question 30

30. Bond angle in water is

Question 31

31. When potassium metal is exposed to violet light

Answer

Ejection of electrons takes place

Answer

Ejection of some potassium atoms occurs

Answer

The absorption of electrons takes place

Answer

There is no effect

Question 32

32. Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to the highest energy

Answer

Microwave, infrared, visible, ultraviolet

Answer

Visible, ultraviolet, infrared, gamma rays

Answer

Radio, visible, infrared, ultraviolet

Answer

X – radiation, visible, infrared, microwave

Question 33

33. The nature of inter-particle forces in benzene is

Answer

Dipole-dipole interaction

Answer

Ion-dipole interaction

Answer

Dispersion force

Question 34

34. The correct set of quantum numbers (n, l and m) respectively of the unpaired electron of chlorine atom is:

Question 35

35. Which of the following compounds can form hydrogen bond?

Question 36

36. Shape of CIO₃¯ is

Answer

Tetrahedral

Answer

Triangular planar

Answer

Triangular bipyramidal

Answer

Triangular pyramidal

Question 37

37. A long a period E.N __________ from left to right

Answer

Variable trend

Question 38

38. Which of the bonds, shown by the ___________ has the greatest polarity?

Answer

H – NH₂

Question 39

39. If the radius of first Bohr orbit be ɜ₀, then the radius of third Bohr orbit would be

Answer

1/2 x ɜ₀

Question 40

40. Which of the following is to isoelectronic with rest of three?

Question 41

41. Colour of the glow produced in the discharge tube

Answer

Does not depend on the nature of the gas used in the discharge tube

Answer

Depends on the gas used in the discharge tube

Answer

Depends on the pressure in the discharge tube

Answer

Does not depend on the nature of the gas used in the discharge tube

Question 42

42. Among the alkaline earth metals the element forming predominantly covalent compounds is

Question 43

43. Which of the following has unchanged valency?

Question 44

44. According to MO theory, the species O⁺₂ possesses

Answer

Stability lower then O₂

Answer

Diamagnetic character

Answer

Three unpaired electrons

Answer

Bond order of 2.5

Question 45

45. Nitrogen gas is chemically inert gas due to the reason that

Answer

There is triple bond between nitrogen atoms which make the molecule quite stable

Answer

Some of the electrons are also present in anti-bonding molecular orbitals

Answer

It has high electronegativity

Answer

It has high heat of dissociation

Question 46

46. When 6d orbital is complete, the entering electron goes into

Question 47

47. When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?

Answer

Dipole interaction

Answer

Hydrogen bond formation

Answer

Covalent attraction

Answer

Van der Waal’s forces

Question 48

48. Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

Answer

Low ionization energy of sodium

Answer

Emission of excess energy absorbed as a radiation in the visible region

Answer

Sublimation of metallic sodium to give yellow vapour

Answer

Photosensitivity of sodium

Question 49

49. In the ground state, an element has 13 electrons in its M shell. The element is

Question 50

50. 1 erg of energy corresponds to

Answer

6.02 x 10²³ J/mol

Answer

10¯⁷ J/mol

Answer

6.02 x 10¹⁶ J/mol

Question 51

51. Fluorine molecule is formed by

Answer

The axial s-p overlap

Answer

The axial p-p overlap

Answer

The sidewise p-p overlap

Answer

The overlap of two sp² hybrid orbitals

Question 52

52. Which of the following is not absolute term of element?

Answer

Ionization energy

Answer

Electronegativity

Answer

Atomic size

Answer

Electron affinity

Question 53

53. The relative attraction of the nucleus for the electrons in a chemical bond is called

Answer

Ionization energy

Answer

None of these

Answer

Electron affinity

Answer

Electro negativity

Question 54

54. Effective magnetic moment of Sc³ ion is

Question 55

55. By combining n atomic orbital, numbers of hybrid orbitals will be

Answer

Impossible to predict

Question 56

56. The spectrum of helium is expected to be similar to that of

Question 57

57. Nuclear radiation is emitted by those elements whose

Answer

Nuclei are unstable

Answer

Nuclei are stable

Answer

Molecules are unstable

Answer

Molecules are stable

Question 58

58. The energy of the first electron in helium will be

Question 59

59. Bohr’s model atom is contradicted by

Answer

Quarternization of energy of electrons

Answer

Quarternization of angular members

Answer

Heisenberg’s uncertainty principle

Answer

Plank’s quantum theory

Question 60

60. Bond order for N2 molecule is

Question 61

61. The force which holds the atoms together to form a compound is known as

Answer

Van der Waal’s force

Answer

Chemical bond

Answer

Dispersion force

Answer

London force

Question 62

62. Unit of dipole moment is

Question 63

63. Which of the following geometry is associated with the compound in which the central atom assumes sp³ d hybridization?

Answer

Trigonal bipyramidal

Question 64

64. The configuration 1s² 2s² 2p⁵ 3s¹ shows

Answer

Ground state of fluorine atom

Answer

Excited state of neon

Answer

Excited state of O¯₂

Answer

Excited state of fluorine

Answer 123

Blue has higher wavelength

Answer 124

Blue has more energy

Answer 125

Blue is absorbed more easily

Answer 126

Blue is darker colour

Answer 127

The two atoms start ionization

Answer 128

The repulsive force dominate the attractive forces

Answer 129

They energy of atoms increases

Answer 130

The attractive forces dominate the repulsive forces

Answer 131

Trigonal bipyramidal

Answer 132

Square planar

Answer 133

Octahedral

Answer 134

All of these

Answer 135

The nature of electrode

Answer 136

The nature of discharge tube

Answer 137

The nature of residual gas

Answer 138

Co-ordinate bond

Answer 139

Electrovalent bond

Answer 140

Double bond

Answer 141

Covalent bond

Answer 142

All of above represent same entity

Answer 143

Attractive force

Answer 144

Interaction

Answer 145

It is equal to the 1st ionization energy

Answer 146

It is always greater than 1st ionization energy

Answer 147

It is always less than 1st ionization energy

Answer 148

It may be greater or less than the 1st ionization depending upon ht nature of the element

Answer 149

First decreases then increases

Answer 150

n = 2, l = 0

Answer 151

n = 2, l = 1

Answer 152

n = 1, l = 2

Answer 153

n = 1, l = 0

Answer 154

Lone pair – lone pair repulsion and lone pair – bond pair repulsion

Answer 155

Lone pair – lone pair repulsion only

Answer 156

Bond pair – bond pair repulsion only

Answer 157

Lone pair – bond pair repulsion only

Answer 158

4, 4, 0, ½

Answer 159

4, 1, 1, ½

Answer 160

4, 0, 0, ½

Answer 161

4, 1, 0, ½

Answer 162

Two unpaired electron

Answer 163

One unpaired electron

Answer 164

None of these

Answer 165

No unpaired electron

Answer 166

Square planner

Answer 167

Octahedral

Answer 168

Trigonal bipyramidal

Answer 169

Triangular

Answer 170

Gamma rays

Answer 171

Larger wavelength

Answer 172

X-rays not produced

Answer 173

Shorter wavelength

Answer 174

Electronegativity

Answer 175

Ionization potential

Answer 176

Activation energy

Answer 177

Electron affinity

Answer 178

Two sigma, two pi

Answer 179

One sigma, two pi

Answer 180

One sigma, one pi

Answer 181

Two sigma, one pi

Answer 182

10.2340178

Answer 183

A pair of electrons

Answer 184

A pair of valence electrons not involved in bonding

Answer 185

A pair of electrons involved in bonding

Answer 186

A pair of valence electrons

Answer 187

p orbitals

Answer 188

sp³ hybrid orbitals

Answer 189

s orbitals

Answer 190

sp² hybrid orbitals

Answer 191

Linear geometry

Answer 192

Dipole moment is zero

Answer 193

SP hybridization

Answer 194

Metallic bond

Answer 195

Ionic bond

Answer 196

Bonding molecular orbitals have low electron density between the two nuclei

Answer 197

Bonding molecular orbitals are formed when the electrons waves are undergo constructive interference

Answer 198

Every electron in the bonding molecular orbital contributes to the attraction between atoms

Answer 199

Bonding molecular possess less energy than atomic orbitals from which they are formed

Answer 200

Pauli exclusion principle

Answer 201

Octet rule

Answer 202

Electropositive character of elements

Answer 203

Electronegative character of elements

Answer 204

Alkali metals

Answer 205

Coinage metals

Answer 206

Gun metals

Answer 207

Noble gases

Answer 208

8 in bonding molecular orbitals, 4 in anti-bonding molecular orbitals

Answer 209

10 in bonding molecular orbitals and 2 in anti-bonding molecular orbitals

Answer 210

9 in bonding molecular orbitals and 3 in anti-bonding molecular orbitals

Answer 211

12 in bonding molecular orbitals, and zero in anti-bonding molecular orbitals

Answer 212

Greater than 1.7

Answer 213

No specificity exist

Answer 214

Equal to 1.7

Answer 215

Lesser then 1.7

Answer 216

They do not react with one another

Answer 217

They have high ionization energies

Answer 218

They are mono atomic gases

Answer 219

They have completely filled s and p orbitals

Answer 220

Square planner

Answer 221

Triangular

Answer 222

Tetrahedral

Answer 223

By losing three electrons

Answer 224

By gaining three electrons

Answer 225

By losing two electrons

Answer 226

By gaining two electrons

Answer 227

First decreases then increases

Answer 228

First increases then decreases

Answer 229

Fluorides are more electronegative

Answer 230

Boron trifluoride is pyramidal in shape while NH₃ is planar

Answer 231

Fluorides is more electronegative

Answer 232

NH₃ is pyramidal in shape while BF₃ is planar

Answer 233

Liquid NH3

Answer 234

Liquid HCl

Answer 235

Electronegativity

Answer 236

Electron affinity

Answer 237

Ionization energy

Answer 238

None of these

Answer 239

3 bond pair one lone pair

Answer 240

1 bond pair 3 lone pair

Answer 241

2 bond pair 2 lone pair

Answer 242

3 lone pair 1 bond pair

Answer 243

Lemon juice is dangerous for health

Answer 244

There may be a possibility of a chemical reaction

Answer 245

There may not be a possibility of chemical reaction

Answer 246

Water should be preferred over lemon Juice for drinking

Answer 247

Remain same

Answer 248

Fourth Bohr orbit to the first Bohr orbit

Answer 249

Seventh Bohr orbit to the third Bohr orbit

Answer 250

Fifth Bohr orbit to the second Bohr orbit

Answer 251

Sixth Bohr orbit to the third Bohr orbit

Answer 252

Two sigma bonds and one pi-bond

Answer 253

Three pi-bonds

Answer 254

One sigma bond and two pi-bonds

Answer 255

Three sigma bonds

Answer 256

Impossible to predict

Answer 257

Lesser than individual

Answer 258

Higher than individual

Answer 259

Atomic orbital and hybrid orbital

Answer 260

Hybrid orbitals

Answer 261

Hybrid and un hybrid orbitals

Answer 262

Un-hybrid orbitals

Answer 263

As bonding molecular orbitals become more stable, anti-bonding molecular orbital become equally less stable

Answer 264

The molecular orbitals in a molecule equals twice the number of constituent atomic orbitals

Answer 265

In molecular orbitals, the number of bonding electrons equals the number of anti-bonding electrons

Answer 266

Each bonding molecular orbital can accommodate only one electron

Answer 267

Decreases for low value of Z and increases for higher value of Z

Answer 268

Remains constant

Answer 269

Bond length in NO⁺ is greater than in NO

Answer 270

Bond length is unpredictable

Answer 271

Bond length in NO⁺ is equal to that in NO

Answer 272

Bond length in NO is greater than in NO⁺

Answer 273

2.657 x 10¯²³ g

Answer 274

5.316 x 10¯²³ g

Answer 275

5.316 x 10¯²³ g

Answer 276

Planar triangle

Answer 277

Distorted tetrahedral

Answer 278

Octahedral

Answer 279

Equal to square

Answer 280

Depends on its source

Answer 281

Independent of its wavelength

Answer 282

Depends on its wavelength

Answer 283

Ionic bonds

Answer 284

2 covalent, one co-ordinate bond

Answer 285

2 sigma bonds

Answer 286

2π and one σ bond

Answer 287

Trigonal bipyramidal

Answer 288

Tetrahedral

Answer 289

Octahedral

Answer 290

Triangular

Answer 291

Tetrahedral

Answer 292

None of these

Answer 293

Electro negativity

Answer 294

Electron affinity

Answer 295

Ionization energy

Answer 296

sp³-hybridized carbon

Answer 297

always same irrespective of its hybrid state

Answer 298

sp²- hybridized carbon

Answer 299

sp- hybridized carbon

Answer 300

Carbon tetrachloride

Answer 301

Carbon dioxide

Answer 302

Charged particles

Answer 303

Can be deflected by magnetic fields

Answer 304

A stream of electrons

Answer 305

Move with speed as that of light

Answer 306

Polar solvents

Answer 307

Concentrated acids

Answer 308

Non-polar solvents

Answer 309

All solvents

Answer 310

Tetrahedral

Answer 311

Trigonal bipyramidal

Answer 312

Square planar

Answer 313

Orbital overlap will not occur

Answer 314

None of these

Answer 315

Bonding will not occur

Answer 316

Both A and B are correct

Answer 317

Sulphure has high electronegativity than oxygen

Answer 318

Hydrogen sulphide is a weak acid

Answer 319

Water molecules associate through hydrogen bonding

Answer 320

Water has higher molecular weight

Answer 321

Does not change in a period

Answer 322

Generally increases from left to right in a period

Answer 323

Does not change in a group

Answer 324

Increase from top to bottom in a group

Answer 325

Hydrogen bonds only

Answer 326

Ionic and nonpolar hydrogen bonds

Answer 327

Nonpolar covalent bonds only

Answer 328

Both polar covalent and hydrogen bonds

Answer 329

9.1095 x 10¯³¹

Answer 330

6.02 x 10²³

Answer 331

1.7588 x 10¹¹

Answer 332

1.7588 x 10²⁰

Answer 333

6 electrons

Answer 334

4 electrons

Answer 335

2 electrons

Answer 336

1 electron

Answer 337

Low, positive or slightly negative

Answer 338

High, very negative

Answer 339

Low very negative

Answer 340

None of these

Answer 341

Planar triangle

Answer 342

Tetrahedral

Answer 343

Square planar

Total Questions:	187
Time Allowed:	60 Minutes
Total Marks:	187
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Important Chemistry Chemical Bonding Question and Answer

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