Chemistry Chemical Bonding Online Mcqs Test

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Question 1

1. The number and type of bonds between carbon atoms in calcium carbide are

Answer

One sigma, two pi

Answer

One sigma, one pi

Answer

Two sigma, one pi

Answer

Two sigma, two pi

Question 2

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

Answer

Triangular

Answer

Tetrahedral

Question 3

3. The energy of a photon is given as, ∆ E/atom = 3.03 x 10¯¹⁹ J atom¯¹ then, the wavelength (λ) of the photon is

Question 4

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

Question 5

5. Lateral overlapping expected in

Answer

Ionic bond

Answer

Metallic bond

Question 6

6. The velocity of photon is

Answer

Equal to square

Answer

Depends on its source

Answer

Depends on its wavelength

Answer

Independent of its wavelength

Question 7

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

Question 8

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

Question 9

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

Question 10

10. Number of sigma bonds in P₄O₁₀ is

Question 11

11. Bohr’s model atom is contradicted by

Answer

Plank’s quantum theory

Answer

Quarternization of angular members

Answer

Quarternization of energy of electrons

Answer

Heisenberg’s uncertainty principle

Question 12

12. Which of the following species has lone pair of electrons on central atom?

Question 13

13. Ionic radius in a period from left to right

Answer

First decreases then increases

Answer

First increases then decreases

Question 14

14. Geometry of molecule will be pyramidal if the outer post shell of the central atom has

Answer

2 bond pair 2 lone pair

Answer

1 bond pair 3 lone pair

Answer

3 bond pair one lone pair

Answer

3 lone pair 1 bond pair

Question 15

15. In acetylene molecule, the two carbon atoms are linked by

Answer

Three sigma bonds

Answer

Two sigma bonds and one pi-bond

Answer

Three pi-bonds

Answer

One sigma bond and two pi-bonds

Question 16

16. Energy of an atom in a compound is

Answer

Higher than individual

Answer

Lesser than individual

Answer

Impossible to predict

Question 17

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

Question 18

18. Force responsible to hold atoms together in a compound is called

Answer

Interaction

Answer

Attractive force

Answer

All of above represent same entity

Question 19

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

Answer

Excited state of neon

Answer

Ground state of fluorine atom

Answer

Excited state of O¯₂

Answer

Excited state of fluorine

Question 20

20. Lewis acids are

Answer

Electron rich

Answer

No such acids exist

Answer

Electron deficient

Answer

Octet is complete

Question 21

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

Question 22

22. The structure of ICl₂¯ is

Answer

Square planar

Answer

Octahedral

Answer

Trigonal bipyramidal

Question 23

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

Answer

Electron affinity

Answer

Electronegativity

Answer

Ionization potential

Answer

Activation energy

Question 24

24. Nuclear radiation is emitted by those elements whose

Answer

Nuclei are unstable

Answer

Molecules are stable

Answer

Nuclei are stable

Answer

Molecules are unstable

Question 25

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

Answer

Tetrahedral

Answer

Planar triangle

Answer

Square planar

Question 26

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

Answer

Boron trifluoride is pyramidal in shape while NH₃ is planar

Answer

Fluorides is more electronegative

Answer

NH₃ is pyramidal in shape while BF₃ is planar

Answer

Fluorides are more electronegative

Question 27

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

Answer

Trigonal bipyramidal

Question 28

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

Answer

Ion-dipole interaction

Answer

Dispersion force

Answer

Dipole-dipole interaction

Question 29

29. In a double bond connecting two atoms there is a sharing of

Answer

4 electrons

Answer

6 electrons

Answer

1 electron

Answer

2 electrons

Question 30

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

Question 31

31. Which of these molecules require more bond energy?

Question 32

32. Bond order for N2 molecule is

Question 33

33. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Triangular

Answer

Tetrahedral

Answer

Square planner

Question 34

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

Answer

Lemon juice is dangerous for health

Answer

Water should be preferred over lemon Juice for drinking

Answer

There may not be a possibility of chemical reaction

Answer

There may be a possibility of a chemical reaction

Question 35

35. Unit of dipole moment is

Question 36

36. Which one shows high % age of the ionic character?

Question 37

37. 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 38

38. Hydrogen chloride molecule contains

Answer

Double bond

Answer

Electrovalent bond

Answer

Covalent bond

Answer

Co-ordinate bond

Question 39

39. Which one of the following molecules shows high percentage of ionic character?

Question 40

40. Covalent compounds are soluble in

Answer

Concentrated acids

Answer

Non-polar solvents

Answer

Polar solvents

Answer

All solvents

Question 41

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

Answer

1/2 x ɜ₀

Question 42

42. The ionization energy

Answer

Does not change in a period

Answer

Increase from top to bottom in a group

Answer

Generally increases from left to right in a period

Answer

Does not change in a group

Question 43

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

Question 44

44. Which of the following is a non-directional orbital

Question 45

45. Which of the following has maximum e/m value for positive rays?

Question 46

46. Which of the following is the best explanation that CO₂ is a non-polar molecule?

Answer

Linear geometry

Answer

Dipole moment is zero

Answer

SP hybridization

Question 47

47. ____________ has their outermost shell complete in atomic form

Answer

Alkali metals

Answer

Gun metals

Answer

Coinage metals

Answer

Noble gases

Question 48

48. Outermost shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

Question 49

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

Question 50

50. Choose the correct statement

Answer

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

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

Question 51

51. Number of π-bonds in naphthalene is

Question 52

52. The value of e/m ratio of electron is:

Answer

6.02 x 10²³

Answer

1.7588 x 10¹¹

Answer

1.7588 x 10²⁰

Answer

9.1095 x 10¯³¹

Question 53

53. Shape of CIO₃¯ is

Answer

Tetrahedral

Answer

Triangular bipyramidal

Answer

Triangular pyramidal

Answer

Triangular planar

Question 54

54. Which of the following is not isoelectronic?

Question 55

55. 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 56

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

Question 57

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

Question 58

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

Answer

Square planner

Answer

Trigonal bipyramidal

Answer

Octahedral

Answer

Triangular

Question 59

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

Answer

Crystallization

Answer

Colour spectrum

Answer

Vaporization

Answer

Distillation

Question 60

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

Answer

They energy of atoms increases

Answer

The repulsive force dominate the attractive forces

Answer

The two atoms start ionization

Answer

The attractive forces dominate the repulsive forces

Question 61

61. For principle quantum number, n = 4, the total number of orbitals having 1 = 3 is

Question 62

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

Question 63

63. When a double bond is formed between two atoms, one of the bonds is a sigma bond and the other is a pi bond. The pi bond is created by the overlap of……

Answer

p orbitals

Answer

sp³ hybrid orbitals

Answer

s orbitals

Answer

sp² hybrid orbitals

Question 64

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

Answer

Electropositive character of elements

Answer

Octet rule

Answer

Pauli exclusion principle

Answer

Electronegative character of elements

Answer 126

Low very negative

Answer 127

High, very negative

Answer 128

None of these

Answer 129

Low, positive or slightly negative

Answer 130

sp²- hybridized carbon

Answer 131

sp- hybridized carbon

Answer 132

sp³-hybridized carbon

Answer 133

always same irrespective of its hybrid state

Answer 134

Trigonal bipyramidal

Answer 135

Octahedral

Answer 136

Tetrahedral

Answer 137

4, 1, 0, ½

Answer 138

4, 0, 0, ½

Answer 139

4, 1, 1, ½

Answer 140

4, 4, 0, ½

Answer 141

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

Answer 142

Photosensitivity of sodium

Answer 143

Low ionization energy of sodium

Answer 144

Sublimation of metallic sodium to give yellow vapour

Answer 145

The nature of discharge tube

Answer 146

The nature of residual gas

Answer 147

The nature of electrode

Answer 148

All of these

Answer 149

Carbon tetrachloride

Answer 150

Carbon dioxide

Answer 151

6.63 x 10¯³⁴ m

Answer 152

6.65 x 10¯³⁵ m

Answer 153

6.63 x 10¯³³ m

Answer 154

6.63 x 10¯³⁵ m

Answer 155

Can be deflected by magnetic fields

Answer 156

Charged particles

Answer 157

A stream of electrons

Answer 158

Move with speed as that of light

Answer 159

Impossible to predict

Answer 160

Orbital overlap will not occur

Answer 161

Bonding will not occur

Answer 162

None of these

Answer 163

Both A and B are correct

Answer 164

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

Answer 165

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

Answer 166

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

Answer 167

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

Answer 168

Aufbau principal

Answer 169

Hund’s rule

Answer 170

Pauli’s exclusion principle

Answer 171

Water molecules associate through hydrogen bonding

Answer 172

Water has higher molecular weight

Answer 173

Hydrogen sulphide is a weak acid

Answer 174

Sulphure has high electronegativity than oxygen

Answer 175

Blue is darker colour

Answer 176

Blue is absorbed more easily

Answer 177

Blue has higher wavelength

Answer 178

Blue has more energy

Answer 179

The overlap of two sp² hybrid orbitals

Answer 180

The axial s-p overlap

Answer 181

The axial p-p overlap

Answer 182

The sidewise p-p overlap

Answer 183

2.657 x 10¯²³ g

Answer 184

5.316 x 10¯²³ g

Answer 185

5.316 x 10¯²³ g

Answer 186

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

Answer 187

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

Answer 188

Bonding molecular orbitals have low electron density between the two nuclei

Answer 189

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

Answer 190

None of these

Answer 191

Two unpaired electron

Answer 192

No unpaired electron

Answer 193

One unpaired electron

Answer 194

Ejection of electrons takes place

Answer 195

Ejection of some potassium atoms occurs

Answer 196

The absorption of electrons takes place

Answer 197

There is no effect

Answer 198

Electro negativity

Answer 199

None of these

Answer 200

Electron affinity

Answer 201

Ionization energy

Answer 202

None of these

Answer 203

Electronegativity

Answer 204

Electron affinity

Answer 205

Ionization energy

Answer 206

Variable trend

Answer 207

Gamma rays

Answer 208

Larger wavelength

Answer 209

Shorter wavelength

Answer 210

X-rays not produced

Answer 211

Bond length in NO⁺ is equal to that in NO

Answer 212

Bond length is unpredictable

Answer 213

Bond length in NO⁺ is greater than in NO

Answer 214

Bond length in NO is greater than in NO⁺

Answer 215

A pair of valence electrons

Answer 216

A pair of electrons involved in bonding

Answer 217

A pair of valence electrons not involved in bonding

Answer 218

A pair of electrons

Answer 219

First decreases then increases

Answer 220

Subtraction of atomic orbitals

Answer 221

Multiplication of atomic orbitals

Answer 222

Addition of atomic orbitals

Answer 223

None of these

Answer 224

First increases then decreases

Answer 225

First decreases then increases

Answer 226

Remains constant

Answer 227

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

Answer 228

Electronegativity

Answer 229

Electron affinity

Answer 230

Atomic size

Answer 231

Ionization energy

Answer 232

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

Answer 233

It is equal to the 1st ionization energy

Answer 234

It is always less than 1st ionization energy

Answer 235

It is always greater than 1st ionization energy

Answer 236

Nine σ and nine π

Answer 237

Five π and nine σ

Answer 238

Eight σ and eight π

Answer 239

Nine σ and seven π

Answer 240

n = 1, l = 2

Answer 241

n = 2, l = 1

Answer 242

n = 1, l = 0

Answer 243

n = 2, l = 0

Answer 244

By gaining two electrons

Answer 245

By losing three electrons

Answer 246

By gaining three electrons

Answer 247

By losing two electrons

Answer 248

Lesser then 1.7

Answer 249

Greater than 1.7

Answer 250

No specificity exist

Answer 251

Equal to 1.7

Answer 252

Tetrahedral

Answer 253

Triangular planar

Answer 254

Octahedral

Answer 255

Planar triangle

Answer 256

Distorted tetrahedral

Answer 257

Remain same

Answer 258

Van der Waal forces or London dispersion forces

Answer 259

Hydrogen bonds

Answer 260

Covalent forces

Answer 261

All of these

Answer 262

Tetrahedron

Answer 263

2 covalent, one co-ordinate bond

Answer 264

2π and one σ bond

Answer 265

Ionic bonds

Answer 266

2 sigma bonds

Answer 267

Ionic and nonpolar hydrogen bonds

Answer 268

Both polar covalent and hydrogen bonds

Answer 269

Hydrogen bonds only

Answer 270

Nonpolar covalent bonds only

Answer 271

They are smaller than the atoms from which they were formed

Answer 272

They are larger than the atoms from which they were formed

Answer 273

They are formed when electros are formed from atoms

Answer 274

They are also known as cations

Answer 275

Triangular

Answer 276

Square planner

Answer 277

Tetrahedral

Answer 278

Square planar

Answer 279

Trigonal bipyramidal

Answer 280

Tetrahedral

Answer 281

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

Answer 282

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

Answer 283

Depends on the gas used in the discharge tube

Answer 284

Depends on the pressure in the discharge tube

Answer 285

It has high heat of dissociation

Answer 286

It has high electronegativity

Answer 287

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

Answer 288

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

Answer 289

10.2340178

Answer 290

Covalent attraction

Answer 291

Dipole interaction

Answer 292

Van der Waal’s forces

Answer 293

Hydrogen bond formation

Answer 294

Electron affinity

Answer 295

Electro negativity

Answer 296

None of these

Answer 297

Ionization energy

Answer 298

Dispersion force

Answer 299

Van der Waal’s force

Answer 300

London force

Answer 301

Chemical bond

Answer 302

Seventh Bohr orbit to the third Bohr orbit

Answer 303

Sixth Bohr orbit to the third Bohr orbit

Answer 304

Fourth Bohr orbit to the first Bohr orbit

Answer 305

Fifth Bohr orbit to the second Bohr orbit

Answer 306

Bond order of 2.5

Answer 307

Diamagnetic character

Answer 308

Three unpaired electrons

Answer 309

Stability lower then O₂

Answer 310

H – NH₂

Answer 311

They have high ionization energies

Answer 312

They do not react with one another

Answer 313

They have completely filled s and p orbitals

Answer 314

They are mono atomic gases

Answer 315

Radio, visible, infrared, ultraviolet

Answer 316

Visible, ultraviolet, infrared, gamma rays

Answer 317

X – radiation, visible, infrared, microwave

Answer 318

Microwave, infrared, visible, ultraviolet

Answer 319

Liquid HCl

Answer 320

Liquid NH3

Answer 321

Hydrogen fluoride

Answer 322

Hydrogen sulphide

Answer 323

Both are equal

Answer 324

Cannot be determined

Answer 325

Four p-orbitals are involved

Answer 326

All p-orbitals are involved

Answer 327

One p-orbital is involved

Answer 328

One s and 3 p-orbitals are involved

Answer 329

Lone pair – bond pair repulsion only

Answer 330

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

Answer 331

Bond pair – bond pair repulsion only

Answer 332

Lone pair – lone pair repulsion only

Answer 333

Covalent bond

Answer 334

Van der Waal’s forces

Answer 335

Metallic bond

Answer 336

Ionic bond

Answer 337

Hybrid orbitals

Answer 338

Un-hybrid orbitals

Answer 339

Atomic orbital and hybrid orbital

Answer 340

Hybrid and un hybrid orbitals

Answer 341

6.02 x 10²³ J/mol

Answer 342

10¯⁷ J/mol

Answer 343

6.02 x 10¹⁶ J/mol

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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