Chemistry Chemical Bonding Online Mcqs Test

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Question 1

1. Ammonia has a net dipole moment while boron trifluoride has zero dipole moment because

Answer

NH₃ is pyramidal in shape while BF₃ is planar

Answer

Fluorides is more electronegative

Answer

Boron trifluoride is pyramidal in shape while NH₃ is planar

Answer

Fluorides are more electronegative

Question 2

2. Geometry of simple molecule having SP³ hybrid orbital is

Answer

Square planner

Answer

Tetrahedral

Answer

Triangular

Question 3

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

Question 4

4. According to VSEPR theory, the shape of the water molecule is

Answer

Planar triangle

Answer

Octahedral

Answer

Distorted tetrahedral

Question 5

5. Choose the correct statement

Answer

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

Answer

Each bonding molecular orbital can accommodate only one electron

Answer

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

Answer

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

Question 6

6. Which of the sub – atomic particles is not charged?

Question 7

7. Fluorine molecule is formed by

Answer

The sidewise p-p overlap

Answer

The axial s-p overlap

Answer

The overlap of two sp² hybrid orbitals

Answer

The axial p-p overlap

Question 8

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

Question 9

9. Electronic configuration of K is

Question 10

10. Pick out the molecule which has zero dipole moment

Question 11

11. Which one of these is weakest?

Answer

Ionic bond

Answer

Covalent bond

Answer

Metallic bond

Answer

Van der Waal’s forces

Question 12

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

Answer

Stability lower then O₂

Answer

Three unpaired electrons

Answer

Bond order of 2.5

Answer

Diamagnetic character

Question 13

13. The structure of ICl₂¯ is

Answer

Octahedral

Answer

Trigonal bipyramidal

Answer

Square planar

Question 14

14. Colour of the glow produced in the discharge tube

Answer

Depends on the pressure in the discharge tube

Answer

Depends on the gas used in the discharge tube

Answer

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

Answer

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

Question 15

15. The number of d-electrons retained in Fe²⁺ (At. No. of Fe = 26) ions is

Question 16

16. The four quantum numbers of the valency electron of potassium are

Answer

4, 4, 0, ½

Answer

4, 1, 0, ½

Answer

4, 0, 0, ½

Answer

4, 1, 1, ½

Question 17

17. On sp3 hybridization

Answer

Four p-orbitals are involved

Answer

One p-orbital is involved

Answer

One s and 3 p-orbitals are involved

Answer

All p-orbitals are involved

Question 18

18. The energy required to remove electron from an atom is called

Question 19

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

Answer

Electronegativity

Answer

Ionization energy

Answer

None of these

Answer

Electron affinity

Question 20

20. 1 erg of energy corresponds to

Answer

10¯⁷ J/mol

Answer

6.02 x 10¹⁶ J/mol

Answer

6.02 x 10²³ J/mol

Question 21

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

Answer

Tetrahedron

Question 22

22. Which of the following has more unpaired d-electrons?

Question 23

23. XeF₄ has shape of

Answer

Tetrahedral

Answer

Square planar

Answer

Trigonal bipyramidal

Question 24

24. The shape of ClO₃ according to valence shell electron pair repulsion theory will be

Answer

Tetrahedral

Answer

Planar triangle

Answer

Square planar

Question 25

25. The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

Question 26

26. According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be

Answer

Square planner

Answer

Octahedral

Answer

Trigonal bipyramidal

Answer

Triangular

Question 27

27. In which of the following pairs, the numbers of electrons in the outermost shell are different?

Question 28

28. The bond angle H – O – H in ice is closest to

Question 29

29. Elements with ________ first ionization energies and ________ electron affinities generally from cations. Choose the correct point

Answer

High, very negative

Answer

Low, positive or slightly negative

Answer

Low very negative

Answer

None of these

Question 30

30. In Millikan oil – drop experiment, the charges on several different oil drops were as: -5.92. – 4.44, -2.96, -8.88. The units are arbitrary. Choose the likely value of the electronic charge in these arbitrary units?

Question 31

31. Hydrogen chloride molecule contains

Answer

Electrovalent bond

Answer

Covalent bond

Answer

Double bond

Answer

Co-ordinate bond

Question 32

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

Answer

Electro negativity

Answer

None of these

Answer

Ionization energy

Answer

Electron affinity

Question 33

33. Which of the following value of Electronegativity difference corresponds the formation of Ionic Bond?

Answer

No specificity exist

Answer

Greater than 1.7

Answer

Lesser then 1.7

Answer

Equal to 1.7

Question 34

34. Which of these molecules require more bond energy?

Question 35

35. Which one among the following does not have the hydrogen bond?

Answer

Liquid NH3

Answer

Liquid HCl

Question 36

36. 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 37

37. Al become isoelectronic with Ne

Answer

By losing two electrons

Answer

By gaining two electrons

Answer

By losing three electrons

Answer

By gaining three electrons

Question 38

38. The carbon atoms in calcium carbide are held by

Answer

2π and one σ bond

Answer

2 covalent, one co-ordinate bond

Answer

Ionic bonds

Answer

2 sigma bonds

Question 39

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

Answer

Colour spectrum

Answer

Vaporization

Answer

Crystallization

Answer

Distillation

Question 40

40. Which quantum number is sufficient to describe the electron is hydrogen atom?

Question 41

41. Which of the following hydrides has the lowest boiling point?

Question 42

42. Energy of an atom in a compound is

Answer

Lesser than individual

Answer

Impossible to predict

Answer

Higher than individual

Question 43

43. A chemist poured juice on soil. Which idea may he have in his mind?

Answer

Water should be preferred over lemon Juice for drinking

Answer

There may be a possibility of a chemical reaction

Answer

There may not be a possibility of chemical reaction

Answer

Lemon juice is dangerous for health

Question 44

44. Which of the following equation represents the 1^st ionization energy of Na?

Question 45

45. Unit of dipole moment is

Question 46

46. Which of the following has the greatest covalent character?

Question 47

47. Which of the following has zero depolemoment?

Question 48

48. Energy released or absorbed when electrons are added in atom is

Answer

Ionization potential

Answer

Electronegativity

Answer

Electron affinity

Answer

Activation energy

Question 49

49. What happens to IP value if shielding effect is greater?

Answer

Remain same

Question 50

50. Bond order for N2 molecule is

Question 51

51. If the value of principal quantum number is 3, the total possible values for magnetic quantum number will be

Question 52

52. Atom with higher atomic number produces X-rays of

Answer

Shorter wavelength

Answer

X-rays not produced

Answer

Gamma rays

Answer

Larger wavelength

Question 53

53. Which of the following would have a permanent dipole moment?

Question 54

54. Ionic radius in a period from left to right

Answer

First decreases then increases

Answer

First increases then decreases

Question 55

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

Question 56

56. When two hydrogen atoms approach to form a chemical bond

Answer

The repulsive force dominate the attractive forces

Answer

The two atoms start ionization

Answer

The attractive forces dominate the repulsive forces

Answer

They energy of atoms increases

Question 57

57. Lateral overlapping expected in

Answer

Metallic bond

Answer

Ionic bond

Question 58

58. Anti-bonding MO is formed by

Answer

Multiplication of atomic orbitals

Answer

Subtraction of atomic orbitals

Answer

None of these

Answer

Addition of atomic orbitals

Question 59

59. According to VSPER theory, ammonia molecule has --------- shape

Answer

Triangular

Answer

Tetrahedral

Question 60

60. Bond angle in water is

Question 61

61. Formulation of chemical bond between atoms of elements is based on

Answer

Electropositive character of elements

Answer

Pauli exclusion principle

Answer

Octet rule

Answer

Electronegative character of elements

Question 62

62. In OF₂, number of bond pairs and lone pairs of electrons are respectively

Question 63

63. The velocity of photon is

Answer

Depends on its source

Answer

Depends on its wavelength

Answer

Equal to square

Answer

Independent of its wavelength

Question 64

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

Answer

H – NH₂

Answer 131

Eight σ and eight π

Answer 132

Five π and nine σ

Answer 133

Nine σ and nine π

Answer 134

Nine σ and seven π

Answer 135

sp- hybridized carbon

Answer 136

always same irrespective of its hybrid state

Answer 137

sp²- hybridized carbon

Answer 138

sp³-hybridized carbon

Answer 139

Ion-dipole interaction

Answer 140

Dipole-dipole interaction

Answer 141

Dispersion force

Answer 142

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

Answer 143

It is equal to the 1st ionization energy

Answer 144

It is always less than 1st ionization energy

Answer 145

It is always greater than 1st ionization energy

Answer 146

Ionization energy

Answer 147

Electron affinity

Answer 148

Electronegativity

Answer 149

Atomic size

Answer 150

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

Answer 151

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

Answer 152

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

Answer 153

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

Answer 154

Blue has more energy

Answer 155

Blue is absorbed more easily

Answer 156

Blue is darker colour

Answer 157

Blue has higher wavelength

Answer 158

Seventh Bohr orbit to the third Bohr orbit

Answer 159

Fourth Bohr orbit to the first Bohr orbit

Answer 160

Sixth Bohr orbit to the third Bohr orbit

Answer 161

Fifth Bohr orbit to the second Bohr orbit

Answer 162

Dipole moment is zero

Answer 163

Linear geometry

Answer 164

SP hybridization

Answer 165

Hydrogen sulphide

Answer 166

Hydrogen fluoride

Answer 167

Ground state of fluorine atom

Answer 168

Excited state of O¯₂

Answer 169

Excited state of neon

Answer 170

Excited state of fluorine

Answer 171

Two unpaired electron

Answer 172

One unpaired electron

Answer 173

None of these

Answer 174

No unpaired electron

Answer 175

Sublimation of metallic sodium to give yellow vapour

Answer 176

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

Answer 177

Photosensitivity of sodium

Answer 178

Low ionization energy of sodium

Answer 179

n = 1, l = 0

Answer 180

n = 2, l = 0

Answer 181

n = 1, l = 2

Answer 182

n = 2, l = 1

Answer 183

They have high ionization energies

Answer 184

They do not react with one another

Answer 185

They are mono atomic gases

Answer 186

They have completely filled s and p orbitals

Answer 187

1 electron

Answer 188

6 electrons

Answer 189

4 electrons

Answer 190

2 electrons

Answer 191

Hund’s rule

Answer 192

Pauli’s exclusion principle

Answer 193

Aufbau principal

Answer 194

Triangular

Answer 195

Tetrahedral

Answer 196

Square planner

Answer 197

Nuclei are stable

Answer 198

Molecules are unstable

Answer 199

Nuclei are unstable

Answer 200

Molecules are stable

Answer 201

1/2 x ɜ₀

Answer 202

Hybrid orbitals

Answer 203

Hybrid and un hybrid orbitals

Answer 204

Atomic orbital and hybrid orbital

Answer 205

Un-hybrid orbitals

Answer 206

Remains constant

Answer 207

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

Answer 208

Trigonal bipyramidal

Answer 209

1.7588 x 10²⁰

Answer 210

1.7588 x 10¹¹

Answer 211

9.1095 x 10¯³¹

Answer 212

6.02 x 10²³

Answer 213

Plank’s quantum theory

Answer 214

Quarternization of energy of electrons

Answer 215

Heisenberg’s uncertainty principle

Answer 216

Quarternization of angular members

Answer 217

sp² hybrid orbitals

Answer 218

p orbitals

Answer 219

s orbitals

Answer 220

sp³ hybrid orbitals

Answer 221

1 bond pair 3 lone pair

Answer 222

2 bond pair 2 lone pair

Answer 223

3 bond pair one lone pair

Answer 224

3 lone pair 1 bond pair

Answer 225

10.2340178

Answer 226

Variable trend

Answer 227

Does not change in a group

Answer 228

Does not change in a period

Answer 229

Increase from top to bottom in a group

Answer 230

Generally increases from left to right in a period

Answer 231

5.316 x 10¯²³ g

Answer 232

5.316 x 10¯²³ g

Answer 233

2.657 x 10¯²³ g

Answer 234

Non-polar solvents

Answer 235

All solvents

Answer 236

Polar solvents

Answer 237

Concentrated acids

Answer 238

Electron deficient

Answer 239

No such acids exist

Answer 240

Octet is complete

Answer 241

Electron rich

Answer 242

First decreases then increases

Answer 243

They are larger than the atoms from which they were formed

Answer 244

They are formed when electros are formed from atoms

Answer 245

They are smaller than the atoms from which they were formed

Answer 246

They are also known as cations

Answer 247

Tetrahedral

Answer 248

Triangular bipyramidal

Answer 249

Triangular planar

Answer 250

Triangular pyramidal

Answer 251

Ejection of electrons takes place

Answer 252

There is no effect

Answer 253

The absorption of electrons takes place

Answer 254

Ejection of some potassium atoms occurs

Answer 255

Impossible to predict

Answer 256

Octahedral

Answer 257

Trigonal bipyramidal

Answer 258

Tetrahedral

Answer 259

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

Answer 260

It has high electronegativity

Answer 261

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

Answer 262

It has high heat of dissociation

Answer 263

The nature of electrode

Answer 264

All of these

Answer 265

The nature of discharge tube

Answer 266

The nature of residual gas

Answer 267

Water has higher molecular weight

Answer 268

Sulphure has high electronegativity than oxygen

Answer 269

Water molecules associate through hydrogen bonding

Answer 270

Hydrogen sulphide is a weak acid

Answer 271

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

Answer 272

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

Answer 273

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

Answer 274

Bonding molecular orbitals have low electron density between the two nuclei

Answer 275

Can be deflected by magnetic fields

Answer 276

Charged particles

Answer 277

A stream of electrons

Answer 278

Move with speed as that of light

Answer 279

First decreases then increases

Answer 280

First increases then decreases

Answer 281

Coinage metals

Answer 282

Noble gases

Answer 283

Gun metals

Answer 284

Alkali metals

Answer 285

Van der Waal forces or London dispersion forces

Answer 286

All of these

Answer 287

Hydrogen bonds

Answer 288

Covalent forces

Answer 289

Covalent attraction

Answer 290

Hydrogen bond formation

Answer 291

Van der Waal’s forces

Answer 292

Dipole interaction

Answer 293

Electron affinity

Answer 294

None of these

Answer 295

Electro negativity

Answer 296

Ionization energy

Answer 297

Radio, visible, infrared, ultraviolet

Answer 298

X – radiation, visible, infrared, microwave

Answer 299

Visible, ultraviolet, infrared, gamma rays

Answer 300

Microwave, infrared, visible, ultraviolet

Answer 301

A pair of valence electrons not involved in bonding

Answer 302

A pair of electrons

Answer 303

A pair of valence electrons

Answer 304

A pair of electrons involved in bonding

Answer 305

Interaction

Answer 306

Attractive force

Answer 307

All of above represent same entity

Answer 308

Bond length in NO⁺ is equal to that in NO

Answer 309

Bond length in NO is greater than in NO⁺

Answer 310

Bond length is unpredictable

Answer 311

Bond length in NO⁺ is greater than in NO

Answer 312

Orbital overlap will not occur

Answer 313

Bonding will not occur

Answer 314

None of these

Answer 315

Both A and B are correct

Answer 316

Van der Waal’s force

Answer 317

Dispersion force

Answer 318

Chemical bond

Answer 319

London force

Answer 320

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

Answer 321

Lone pair – lone pair repulsion only

Answer 322

Bond pair – bond pair repulsion only

Answer 323

Lone pair – bond pair repulsion only

Answer 324

One sigma bond and two pi-bonds

Answer 325

Two sigma bonds and one pi-bond

Answer 326

Three sigma bonds

Answer 327

Three pi-bonds

Answer 328

Two sigma, one pi

Answer 329

One sigma, one pi

Answer 330

One sigma, two pi

Answer 331

Two sigma, two pi

Answer 332

Carbon dioxide

Answer 333

Carbon tetrachloride

Answer 334

Both polar covalent and hydrogen bonds

Answer 335

Hydrogen bonds only

Answer 336

Nonpolar covalent bonds only

Answer 337

Ionic and nonpolar hydrogen bonds

Answer 338

Triangular planar

Answer 339

Tetrahedral

Answer 340

6.63 x 10¯³³ m

Answer 341

6.63 x 10¯³⁴ m

Answer 342

6.63 x 10¯³⁵ m

Answer 343

6.65 x 10¯³⁵ m

Total Questions:	187
Time Allowed:	60 Minutes
Total Marks:	187
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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