Chemistry Chemical Bonding Online Mcqs Test

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Question 1

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

Answer

1.7588 x 10²⁰

Answer

9.1095 x 10¯³¹

Answer

1.7588 x 10¹¹

Answer

6.02 x 10²³

Question 2

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

Answer

Atomic size

Answer

Electronegativity

Answer

Electron affinity

Answer

Ionization energy

Question 3

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

Answer

There may not be a possibility of chemical reaction

Answer

There may be a possibility of a chemical reaction

Answer

Water should be preferred over lemon Juice for drinking

Answer

Lemon juice is dangerous for health

Question 4

4. H-bonding is not present in

Answer

Hydrogen fluoride

Answer

Hydrogen sulphide

Question 5

5. The velocity of photon is

Answer

Depends on its wavelength

Answer

Depends on its source

Answer

Equal to square

Answer

Independent of its wavelength

Question 6

6. 2nd orbit is away from nucleus for H-atom as compared to first orbit

Question 7

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

Question 8

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

Answer

Bond order of 2.5

Answer

Stability lower then O₂

Answer

Three unpaired electrons

Answer

Diamagnetic character

Question 9

9. Quantum umber values for 2p orbitals are

Answer

n = 2, l = 1

Answer

n = 1, l = 2

Answer

n = 1, l = 0

Answer

n = 2, l = 0

Question 10

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

Question 11

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

Answer

Ionization energy

Answer

Electro negativity

Answer

Electron affinity

Answer

None of these

Question 12

12. Lewis acids are

Answer

Electron deficient

Answer

Octet is complete

Answer

No such acids exist

Answer

Electron rich

Question 13

13. Bond order for N2 molecule is

Question 14

14. The boiling point of heavy water is

Question 15

15. Which one of the following pairs of atoms is most likely to form an ionic bond?

Question 16

16. A lone pair of electrons in an atom implies

Answer

A pair of electrons involved in bonding

Answer

A pair of valence electrons

Answer

A pair of electrons

Answer

A pair of valence electrons not involved in bonding

Question 17

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

Answer

Gamma rays

Answer

Shorter wavelength

Answer

Larger wavelength

Answer

X-rays not produced

Question 18

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

Question 19

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

Answer

Electron affinity

Answer

Electronegativity

Answer

None of these

Answer

Ionization energy

Question 20

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

Question 21

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

Question 22

22. Which of the following is not isoelectronic?

Question 23

23. Which has the minimum bond angle?

Question 24

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

Question 25

25. 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

They energy of atoms increases

Answer

The attractive forces dominate the repulsive forces

Question 26

26. 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 27

27. Bohr’s model atom is contradicted by

Answer

Plank’s quantum theory

Answer

Quarternization of energy of electrons

Answer

Heisenberg’s uncertainty principle

Answer

Quarternization of angular members

Question 28

28. Choose the correct statement

Answer

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

Answer

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

Answer

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

Answer

Each bonding molecular orbital can accommodate only one electron

Question 29

29. Energy of an atom in a compound is

Answer

Higher than individual

Answer

Lesser than individual

Answer

Impossible to predict

Question 30

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

Question 31

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

Question 32

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

Answer

Excited state of O¯₂

Answer

Excited state of fluorine

Answer

Excited state of neon

Answer

Ground state of fluorine atom

Question 33

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

Answer

Linear geometry

Answer

SP hybridization

Answer

Dipole moment is zero

Question 34

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

Question 35

35. Unit of dipole moment is

Question 36

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

Answer

4, 1, 1, ½

Answer

4, 4, 0, ½

Answer

4, 0, 0, ½

Answer

4, 1, 0, ½

Question 37

37. Inter molecular forces in solid hydrogen are

Answer

Hydrogen bonds

Answer

All of these

Answer

Van der Waal forces or London dispersion forces

Answer

Covalent forces

Question 38

38. Fluorine molecule is formed by

Answer

The axial s-p overlap

Answer

The overlap of two sp² hybrid orbitals

Answer

The axial p-p overlap

Answer

The sidewise p-p overlap

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 compounds can form hydrogen bond?

Question 41

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

Question 42

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

Answer

Variable trend

Question 43

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

Answer

Ionization energy

Answer

Electro negativity

Answer

None of these

Answer

Electron affinity

Question 44

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

Question 45

45. Electronic configuration of K is

Question 46

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

Answer

Activation energy

Answer

Ionization potential

Answer

Electron affinity

Answer

Electronegativity

Question 47

47. Effective magnetic moment of Sc³ ion is

Question 48

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

Question 49

49. ____________ has their outermost shell complete in atomic form

Answer

Alkali metals

Answer

Coinage metals

Answer

Gun metals

Answer

Noble gases

Question 50

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

Answer

3 bond pair one lone pair

Answer

2 bond pair 2 lone pair

Answer

1 bond pair 3 lone pair

Answer

3 lone pair 1 bond pair

Question 51

51. 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

Distillation

Answer

Vaporization

Question 52

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

Question 53

53. Nuclear radiation is emitted by those elements whose

Answer

Nuclei are stable

Answer

Molecules are unstable

Answer

Nuclei are unstable

Answer

Molecules are stable

Question 54

54. Which is not true with respect to cathode rays?

Answer

A stream of electrons

Answer

Move with speed as that of light

Answer

Can be deflected by magnetic fields

Answer

Charged particles

Question 55

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

Answer

Remain same

Question 56

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

Question 57

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

Question 58

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

Answer

Dispersion force

Answer

London force

Answer

Chemical bond

Answer

Van der Waal’s force

Question 59

59. Molecular orbital picture of N₂ indicates

Answer

No unpaired electron

Answer

One unpaired electron

Answer

Two unpaired electron

Answer

None of these

Question 60

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

Question 61

61. 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 62

62. 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

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

Answer

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

Answer

Bonding molecular orbitals have low electron density between the two nuclei

Question 63

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

Question 64

64. Which of the following species is paramagnetic?

Answer 126

All p-orbitals are involved

Answer 127

One p-orbital is involved

Answer 128

Four p-orbitals are involved

Answer 129

One s and 3 p-orbitals are involved

Answer 130

Trigonal bipyramidal

Answer 131

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

Answer 132

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

Answer 133

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

Answer 134

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

Answer 135

Hydrogen bonds only

Answer 136

Nonpolar covalent bonds only

Answer 137

Both polar covalent and hydrogen bonds

Answer 138

Ionic and nonpolar hydrogen bonds

Answer 139

Interaction

Answer 140

All of above represent same entity

Answer 141

Attractive force

Answer 142

Bonding will not occur

Answer 143

Both A and B are correct

Answer 144

None of these

Answer 145

Orbital overlap will not occur

Answer 146

Fourth Bohr orbit to the first Bohr orbit

Answer 147

Seventh Bohr orbit to the third Bohr orbit

Answer 148

Fifth Bohr orbit to the second Bohr orbit

Answer 149

Sixth Bohr orbit to the third Bohr orbit

Answer 150

Equal to 1.7

Answer 151

Greater than 1.7

Answer 152

Lesser then 1.7

Answer 153

No specificity exist

Answer 154

Impossible to predict

Answer 155

2.657 x 10¯²³ g

Answer 156

5.316 x 10¯²³ g

Answer 157

5.316 x 10¯²³ g

Answer 158

Square planar

Answer 159

Octahedral

Answer 160

Trigonal bipyramidal

Answer 161

Electronegative character of elements

Answer 162

Octet rule

Answer 163

Pauli exclusion principle

Answer 164

Electropositive character of elements

Answer 165

Nine σ and seven π

Answer 166

Nine σ and nine π

Answer 167

Five π and nine σ

Answer 168

Eight σ and eight π

Answer 169

10.2340178

Answer 170

Triangular

Answer 171

Tetrahedral

Answer 172

Square planner

Answer 173

2 electrons

Answer 174

1 electron

Answer 175

6 electrons

Answer 176

4 electrons

Answer 177

Blue is absorbed more easily

Answer 178

Blue has more energy

Answer 179

Blue is darker colour

Answer 180

Blue has higher wavelength

Answer 181

They are larger than the atoms from which they were formed

Answer 182

They are smaller than the atoms from which they were formed

Answer 183

They are formed when electros are formed from atoms

Answer 184

They are also known as cations

Answer 185

First decreases then increases

Answer 186

Fluorides are more electronegative

Answer 187

NH₃ is pyramidal in shape while BF₃ is planar

Answer 188

Boron trifluoride is pyramidal in shape while NH₃ is planar

Answer 189

Fluorides is more electronegative

Answer 190

It is always less than 1st ionization energy

Answer 191

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

Answer 192

It is always greater than 1st ionization energy

Answer 193

It is equal to the 1st ionization energy

Answer 194

Pauli’s exclusion principle

Answer 195

Aufbau principal

Answer 196

Hund’s rule

Answer 197

Two sigma bonds and one pi-bond

Answer 198

One sigma bond and two pi-bonds

Answer 199

Three sigma bonds

Answer 200

Three pi-bonds

Answer 201

H – NH₂

Answer 202

Carbon dioxide

Answer 203

Carbon tetrachloride

Answer 204

Subtraction of atomic orbitals

Answer 205

None of these

Answer 206

Addition of atomic orbitals

Answer 207

Multiplication of atomic orbitals

Answer 208

Planar triangle

Answer 209

Octahedral

Answer 210

Distorted tetrahedral

Answer 211

The nature of electrode

Answer 212

The nature of residual gas

Answer 213

All of these

Answer 214

The nature of discharge tube

Answer 215

First decreases then increases

Answer 216

First increases then decreases

Answer 217

Radio, visible, infrared, ultraviolet

Answer 218

Visible, ultraviolet, infrared, gamma rays

Answer 219

X – radiation, visible, infrared, microwave

Answer 220

Microwave, infrared, visible, ultraviolet

Answer 221

It has high electronegativity

Answer 222

It has high heat of dissociation

Answer 223

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

Answer 224

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

Answer 225

Sublimation of metallic sodium to give yellow vapour

Answer 226

Photosensitivity of sodium

Answer 227

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

Answer 228

Low ionization energy of sodium

Answer 229

Tetrahedral

Answer 230

Triangular planar

Answer 231

Tetrahedral

Answer 232

Trigonal bipyramidal

Answer 233

Square planar

Answer 234

Van der Waal’s forces

Answer 235

Metallic bond

Answer 236

Covalent bond

Answer 237

Ionic bond

Answer 238

Triangular

Answer 239

Octahedral

Answer 240

Trigonal bipyramidal

Answer 241

Square planner

Answer 242

6.63 x 10¯³³ m

Answer 243

6.65 x 10¯³⁵ m

Answer 244

6.63 x 10¯³⁵ m

Answer 245

6.63 x 10¯³⁴ m

Answer 246

sp³-hybridized carbon

Answer 247

sp²- hybridized carbon

Answer 248

sp- hybridized carbon

Answer 249

always same irrespective of its hybrid state

Answer 250

Triangular bipyramidal

Answer 251

Triangular planar

Answer 252

Triangular pyramidal

Answer 253

Tetrahedral

Answer 254

Liquid NH3

Answer 255

Liquid HCl

Answer 256

Triangular

Answer 257

Square planner

Answer 258

Tetrahedral

Answer 259

Bond length in NO is greater than in NO⁺

Answer 260

Bond length in NO⁺ is equal to that in NO

Answer 261

Bond length is unpredictable

Answer 262

Bond length in NO⁺ is greater than in NO

Answer 263

sp³ hybrid orbitals

Answer 264

p orbitals

Answer 265

sp² hybrid orbitals

Answer 266

s orbitals

Answer 267

Hydrogen sulphide is a weak acid

Answer 268

Water has higher molecular weight

Answer 269

Water molecules associate through hydrogen bonding

Answer 270

Sulphure has high electronegativity than oxygen

Answer 271

Non-polar solvents

Answer 272

Polar solvents

Answer 273

All solvents

Answer 274

Concentrated acids

Answer 275

Lone pair – lone pair repulsion only

Answer 276

Bond pair – bond pair repulsion only

Answer 277

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

Answer 278

Lone pair – bond pair repulsion only

Answer 279

The absorption of electrons takes place

Answer 280

Ejection of some potassium atoms occurs

Answer 281

Ejection of electrons takes place

Answer 282

There is no effect

Answer 283

Tetrahedron

Answer 284

Tetrahedral

Answer 285

Octahedral

Answer 286

Trigonal bipyramidal

Answer 287

Square planar

Answer 288

Planar triangle

Answer 289

Tetrahedral

Answer 290

Remains constant

Answer 291

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

Answer 292

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

Answer 293

Depends on the gas used in the discharge tube

Answer 294

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

Answer 295

Depends on the pressure in the discharge tube

Answer 296

Generally increases from left to right in a period

Answer 297

Does not change in a group

Answer 298

Increase from top to bottom in a group

Answer 299

Does not change in a period

Answer 300

Ion-dipole interaction

Answer 301

Dispersion force

Answer 302

Dipole-dipole interaction

Answer 303

10¯⁷ J/mol

Answer 304

6.02 x 10²³ J/mol

Answer 305

6.02 x 10¹⁶ J/mol

Answer 306

Tetrahedral

Answer 307

Triangular

Answer 308

Covalent bond

Answer 309

Co-ordinate bond

Answer 310

Electrovalent bond

Answer 311

Double bond

Answer 312

By gaining two electrons

Answer 313

By losing two electrons

Answer 314

By losing three electrons

Answer 315

By gaining three electrons

Answer 316

Van der Waal’s forces

Answer 317

Hydrogen bond formation

Answer 318

Dipole interaction

Answer 319

Covalent attraction

Answer 320

One sigma, two pi

Answer 321

Two sigma, two pi

Answer 322

Two sigma, one pi

Answer 323

One sigma, one pi

Answer 324

First decreases then increases

Answer 325

First increases then decreases

Answer 326

2 covalent, one co-ordinate bond

Answer 327

2 sigma bonds

Answer 328

2π and one σ bond

Answer 329

Ionic bonds

Answer 330

Low, positive or slightly negative

Answer 331

High, very negative

Answer 332

None of these

Answer 333

Low very negative

Answer 334

They have high ionization energies

Answer 335

They do not react with one another

Answer 336

They are mono atomic gases

Answer 337

They have completely filled s and p orbitals

Answer 338

Atomic orbital and hybrid orbital

Answer 339

Un-hybrid orbitals

Answer 340

Hybrid orbitals

Answer 341

Hybrid and un hybrid orbitals

Answer 342

Ionic bond

Answer 343

Metallic bond

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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