Chemistry Chemical Bonding Online Mcqs Test

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Question 1

1. Deflection of blue light is lesser than violet because

Answer

Blue has more energy

Answer

Blue has higher wavelength

Answer

Blue is darker colour

Answer

Blue is absorbed more easily

Question 2

2. Inter molecular forces in solid hydrogen are

Answer

All of these

Answer

Van der Waal forces or London dispersion forces

Answer

Hydrogen bonds

Answer

Covalent forces

Question 3

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

Answer

Electron affinity

Answer

Activation energy

Answer

Ionization potential

Answer

Electronegativity

Question 4

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

Answer

X-rays not produced

Answer

Gamma rays

Answer

Shorter wavelength

Answer

Larger wavelength

Question 5

5. The boiling point of heavy water is

Question 6

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

Question 7

7. Number of sigma bonds in P₄O₁₀ is

Question 8

8. Energy of an atom in a compound is

Answer

Impossible to predict

Answer

Lesser than individual

Answer

Higher than individual

Question 9

9. Which of the following species is paramagnetic?

Question 10

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

Answer

Planar triangle

Answer

Tetrahedral

Answer

Square planar

Question 11

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

Answer

Electronegative character of elements

Answer

Octet rule

Answer

Pauli exclusion principle

Answer

Electropositive character of elements

Question 12

12. 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 13

13. 2nd orbit is away from nucleus for H-atom as compared to first orbit

Question 14

14. Unit of dipole moment is

Question 15

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

Question 16

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

Answer

1 bond pair 3 lone pair

Answer

3 bond pair one lone pair

Answer

2 bond pair 2 lone pair

Answer

3 lone pair 1 bond pair

Question 17

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

Answer

Eight σ and eight π

Answer

Nine σ and seven π

Answer

Nine σ and nine π

Answer

Five π and nine σ

Question 18

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

Question 19

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

Answer

1.7588 x 10²⁰

Answer

6.02 x 10²³

Answer

9.1095 x 10¯³¹

Answer

1.7588 x 10¹¹

Question 20

20. Which of the following molecule has Ā bond

Question 21

21. Nuclear radiation is emitted by those elements whose

Answer

Nuclei are stable

Answer

Molecules are unstable

Answer

Molecules are stable

Answer

Nuclei are unstable

Question 22

22. 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

Covalent attraction

Answer

Hydrogen bond formation

Answer

Van der Waal’s forces

Answer

Dipole interaction

Question 23

23. Bond angle in water is

Question 24

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

Answer

Impossible to predict

Question 25

25. XeF₄ has shape of

Answer

Square planar

Answer

Trigonal bipyramidal

Answer

Tetrahedral

Question 26

26. On sp3 hybridization

Answer

All p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Answer

Four p-orbitals are involved

Answer

One p-orbital is involved

Question 27

27. In which one of the following does the central atom not possess can octet in its outer shell?

Question 28

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

Question 29

29. Which of the following molecules has no net dipole moment?

Question 30

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

Question 31

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

Answer

Electron affinity

Answer

Electronegativity

Answer

Ionization energy

Answer

Atomic size

Question 32

32. Which of the following molecules does not have a net dipole moment?

Question 33

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

Answer

Variable trend

Question 34

34. The third line of the Balmer series, in the emission spectrum of the hydrogen atom, is due to the transition from the

Answer

Fourth Bohr orbit to the first Bohr orbit

Answer

Seventh Bohr orbit to the third Bohr orbit

Answer

Sixth Bohr orbit to the third Bohr orbit

Answer

Fifth Bohr orbit to the second Bohr orbit

Question 35

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

Answer

Trigonal bipyramidal

Question 36

36. How many molecular orbitals may be constructed from the valence shell orbitals of the constituent atoms in CH₄?

Question 37

37. Electronic configuration of K is

Question 38

38. Keeping in view the bonding molecular orbitals, find the incorrect statement

Answer

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

Answer

Bonding molecular orbitals have low electron density between the two nuclei

Answer

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

Answer

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

Question 39

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

Answer

Van der Waal’s force

Answer

Dispersion force

Answer

Chemical bond

Answer

London force

Question 40

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

Answer

Fluorides are more electronegative

Answer

Boron trifluoride is pyramidal in shape while NH₃ is planar

Answer

NH₃ is pyramidal in shape while BF₃ is planar

Answer

Fluorides is more electronegative

Question 41

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

Question 42

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

Question 43

43. In O2 each oxygen atom is hybridized

Question 44

44. 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 45

45. Maximum hydrogen bonds in water are,

Question 46

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

Answer

Distillation

Answer

Vaporization

Answer

Crystallization

Answer

Colour spectrum

Question 47

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

Question 48

48. The carbon atoms in calcium carbide are held by

Answer

2π and one σ bond

Answer

2 sigma bonds

Answer

2 covalent, one co-ordinate bond

Answer

Ionic bonds

Question 49

49. If atomic numbers of nickel and copper are 28 and 29 respectively. Which of the following does the electronic configuration 1s² 2s² 2p⁶3s²3p⁶3d⁹ represent?

Question 50

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

Answer

Two sigma bonds and one pi-bond

Answer

Three pi-bonds

Answer

One sigma bond and two pi-bonds

Answer

Three sigma bonds

Question 51

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

Answer

H – NH₂

Question 52

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

Answer

Remain same

Question 53

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

Answer

First decreases then increases

Answer

First increases then decreases

Question 54

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

Answer

4 electrons

Answer

6 electrons

Answer

2 electrons

Answer

1 electron

Question 55

55. Quantum umber values for 2p orbitals are

Answer

n = 1, l = 2

Answer

n = 2, l = 0

Answer

n = 1, l = 0

Answer

n = 2, l = 1

Question 56

56. Unit of dipole moment is

Question 57

57. Bohr’s model atom is contradicted by

Answer

Plank’s quantum theory

Answer

Quarternization of energy of electrons

Answer

Quarternization of angular members

Answer

Heisenberg’s uncertainty principle

Question 58

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

Answer

Interaction

Answer

Attractive force

Answer

All of above represent same entity

Question 59

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

Question 60

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

Question 61

61. Pi bonds are produced by overlapping of

Answer

Un-hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid and un hybrid orbitals

Answer

Hybrid orbitals

Question 62

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

Answer

Tetrahedron

Question 63

63. Which of the following has unchanged valency?

Question 64

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

Answer 116

None of these

Answer 117

Electron affinity

Answer 118

Ionization energy

Answer 119

Electro negativity

Answer 120

Electron affinity

Answer 121

None of these

Answer 122

Ionization energy

Answer 123

Electronegativity

Answer 124

Bond order of 2.5

Answer 125

Diamagnetic character

Answer 126

Three unpaired electrons

Answer 127

Stability lower then O₂

Answer 128

Ground state of fluorine atom

Answer 129

Excited state of neon

Answer 130

Excited state of fluorine

Answer 131

Excited state of O¯₂

Answer 132

Bond pair – bond pair repulsion only

Answer 133

Lone pair – bond pair repulsion only

Answer 134

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

Answer 135

Lone pair – lone pair repulsion only

Answer 136

Multiplication of atomic orbitals

Answer 137

None of these

Answer 138

Subtraction of atomic orbitals

Answer 139

Addition of atomic orbitals

Answer 140

One sigma, two pi

Answer 141

Two sigma, one pi

Answer 142

One sigma, one pi

Answer 143

Two sigma, two pi

Answer 144

Metallic bond

Answer 145

Van der Waal’s forces

Answer 146

Ionic bond

Answer 147

Covalent bond

Answer 148

It is always less than 1st ionization energy

Answer 149

It is always greater than 1st ionization energy

Answer 150

It is equal to the 1st ionization energy

Answer 151

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

Answer 152

Triangular

Answer 153

Tetrahedral

Answer 154

Photosensitivity of sodium

Answer 155

Low ionization energy of sodium

Answer 156

Sublimation of metallic sodium to give yellow vapour

Answer 157

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

Answer 158

Hydrogen bonds only

Answer 159

Nonpolar covalent bonds only

Answer 160

Ionic and nonpolar hydrogen bonds

Answer 161

Both polar covalent and hydrogen bonds

Answer 162

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

Answer 163

Depends on the gas used in the discharge tube

Answer 164

Depends on the pressure in the discharge tube

Answer 165

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

Answer 166

Trigonal bipyramidal

Answer 167

Octahedral

Answer 168

Tetrahedral

Answer 169

Two unpaired electron

Answer 170

None of these

Answer 171

No unpaired electron

Answer 172

One unpaired electron

Answer 173

Coinage metals

Answer 174

Gun metals

Answer 175

Noble gases

Answer 176

Alkali metals

Answer 177

Liquid HCl

Answer 178

Liquid NH3

Answer 179

They have completely filled s and p orbitals

Answer 180

They are mono atomic gases

Answer 181

They have high ionization energies

Answer 182

They do not react with one another

Answer 183

None of these

Answer 184

Bonding will not occur

Answer 185

Orbital overlap will not occur

Answer 186

Both A and B are correct

Answer 187

sp² hybrid orbitals

Answer 188

sp³ hybrid orbitals

Answer 189

s orbitals

Answer 190

p orbitals

Answer 191

Ionic bond

Answer 192

Metallic bond

Answer 193

The overlap of two sp² hybrid orbitals

Answer 194

The axial s-p overlap

Answer 195

The axial p-p overlap

Answer 196

The sidewise p-p overlap

Answer 197

First increases then decreases

Answer 198

First decreases then increases

Answer 199

Carbon dioxide

Answer 200

Carbon tetrachloride

Answer 201

Trigonal bipyramidal

Answer 202

Triangular

Answer 203

Octahedral

Answer 204

Square planner

Answer 205

Bond length in NO⁺ is greater than in NO

Answer 206

Bond length is unpredictable

Answer 207

Bond length in NO is greater than in NO⁺

Answer 208

Bond length in NO⁺ is equal to that in NO

Answer 209

Visible, ultraviolet, infrared, gamma rays

Answer 210

Radio, visible, infrared, ultraviolet

Answer 211

X – radiation, visible, infrared, microwave

Answer 212

Microwave, infrared, visible, ultraviolet

Answer 213

Ionization energy

Answer 214

Electron affinity

Answer 215

None of these

Answer 216

Electro negativity

Answer 217

They energy of atoms increases

Answer 218

The repulsive force dominate the attractive forces

Answer 219

The attractive forces dominate the repulsive forces

Answer 220

The two atoms start ionization

Answer 221

Tetrahedral

Answer 222

Triangular

Answer 223

Square planner

Answer 224

Square planner

Answer 225

Tetrahedral

Answer 226

Triangular

Answer 227

Co-ordinate bond

Answer 228

Electrovalent bond

Answer 229

Covalent bond

Answer 230

Double bond

Answer 231

They are larger than the atoms from which they were formed

Answer 232

They are also known as cations

Answer 233

They are smaller than the atoms from which they were formed

Answer 234

They are formed when electros are formed from atoms

Answer 235

By losing three electrons

Answer 236

By gaining three electrons

Answer 237

By losing two electrons

Answer 238

By gaining two electrons

Answer 239

Triangular planar

Answer 240

Tetrahedral

Answer 241

Water should be preferred over lemon Juice for drinking

Answer 242

There may not be a possibility of chemical reaction

Answer 243

Lemon juice is dangerous for health

Answer 244

There may be a possibility of a chemical reaction

Answer 245

5.316 x 10¯²³ g

Answer 246

5.316 x 10¯²³ g

Answer 247

2.657 x 10¯²³ g

Answer 248

Ion-dipole interaction

Answer 249

Dipole-dipole interaction

Answer 250

Dispersion force

Answer 251

Water has higher molecular weight

Answer 252

Hydrogen sulphide is a weak acid

Answer 253

Water molecules associate through hydrogen bonding

Answer 254

Sulphure has high electronegativity than oxygen

Answer 255

Hydrogen fluoride

Answer 256

Hydrogen sulphide

Answer 257

Hund’s rule

Answer 258

Pauli’s exclusion principle

Answer 259

Aufbau principal

Answer 260

4, 1, 0, ½

Answer 261

4, 1, 1, ½

Answer 262

4, 0, 0, ½

Answer 263

4, 4, 0, ½

Answer 264

Increase from top to bottom in a group

Answer 265

Does not change in a group

Answer 266

Generally increases from left to right in a period

Answer 267

Does not change in a period

Answer 268

Independent of its wavelength

Answer 269

Equal to square

Answer 270

Depends on its source

Answer 271

Depends on its wavelength

Answer 272

sp²- hybridized carbon

Answer 273

sp³-hybridized carbon

Answer 274

always same irrespective of its hybrid state

Answer 275

sp- hybridized carbon

Answer 276

Low very negative

Answer 277

Low, positive or slightly negative

Answer 278

None of these

Answer 279

High, very negative

Answer 280

Octahedral

Answer 281

Distorted tetrahedral

Answer 282

Planar triangle

Answer 283

First decreases then increases

Answer 284

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

Answer 285

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

Answer 286

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

Answer 287

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

Answer 288

10.2340178

Answer 289

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

Answer 290

It has high electronegativity

Answer 291

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

Answer 292

It has high heat of dissociation

Answer 293

All of these

Answer 294

The nature of electrode

Answer 295

The nature of discharge tube

Answer 296

The nature of residual gas

Answer 297

Both are equal

Answer 298

Cannot be determined

Answer 299

Each bonding molecular orbital can accommodate only one electron

Answer 300

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

Answer 301

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

Answer 302

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

Answer 303

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

Answer 304

Remains constant

Answer 305

Triangular bipyramidal

Answer 306

Triangular planar

Answer 307

Triangular pyramidal

Answer 308

Tetrahedral

Answer 309

1/2 x ɜ₀

Answer 310

Equal to 1.7

Answer 311

Greater than 1.7

Answer 312

Lesser then 1.7

Answer 313

No specificity exist

Answer 314

Square planar

Answer 315

Trigonal bipyramidal

Answer 316

Octahedral

Answer 317

Charged particles

Answer 318

Can be deflected by magnetic fields

Answer 319

A stream of electrons

Answer 320

Move with speed as that of light

Answer 321

Non-polar solvents

Answer 322

Polar solvents

Answer 323

All solvents

Answer 324

Concentrated acids

Answer 325

Ejection of electrons takes place

Answer 326

Ejection of some potassium atoms occurs

Answer 327

The absorption of electrons takes place

Answer 328

There is no effect

Answer 329

Dipole moment is zero

Answer 330

SP hybridization

Answer 331

Linear geometry

Answer 332

A pair of electrons involved in bonding

Answer 333

A pair of valence electrons

Answer 334

A pair of valence electrons not involved in bonding

Answer 335

A pair of electrons

Answer 336

6.65 x 10¯³⁵ m

Answer 337

6.63 x 10¯³⁵ m

Answer 338

6.63 x 10¯³³ m

Answer 339

6.63 x 10¯³⁴ m

Answer 340

Electron rich

Answer 341

Octet is complete

Answer 342

No such acids exist

Answer 343

Electron deficient

Total Questions:	187
Time Allowed:	60 Minutes
Total Marks:	187
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