Chemistry Chemical Bonding Online Mcqs Test

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Question 1

1. Which of the following has zero depolemoment?

Question 2

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

Answer

There may be a possibility of a chemical reaction

Answer

Water should be preferred over lemon Juice for drinking

Answer

There may not be a possibility of chemical reaction

Answer

Lemon juice is dangerous for health

Question 3

3. Inter molecular forces in solid hydrogen are

Answer

Covalent forces

Answer

All of these

Answer

Hydrogen bonds

Answer

Van der Waal forces or London dispersion forces

Question 4

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

Question 5

5. Hydrogen chloride molecule contains

Answer

Electrovalent bond

Answer

Covalent bond

Answer

Double bond

Answer

Co-ordinate bond

Question 6

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

Answer

None of these

Answer

Electron affinity

Answer

Electro negativity

Answer

Ionization energy

Question 7

7. When potassium metal is exposed to violet light

Answer

Ejection of electrons takes place

Answer

The absorption of electrons takes place

Answer

There is no effect

Answer

Ejection of some potassium atoms occurs

Question 8

8. If the molecule of HCl were totally polar, the expected value of dipole moment is 6.12 D (Debye) but the experimental value of dipole moment was 1.03 D. Calculate the percentage ionic character.

Question 9

9. Molecular orbitals are filled according to

Answer

Hund’s rule

Answer

Aufbau principal

Answer

Pauli’s exclusion principle

Question 10

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

Answer

H – NH₂

Question 11

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

Answer

They are also known as cations

Answer

They are larger than the atoms from which they were formed

Answer

They are formed when electros are formed from atoms

Answer

They are smaller than the atoms from which they were formed

Question 12

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

Question 13

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

Answer

Two sigma, two pi

Answer

Two sigma, one pi

Answer

One sigma, two pi

Answer

One sigma, one pi

Question 14

14. 2nd orbit is away from nucleus for H-atom as compared to first orbit

Question 15

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

Question 16

16. The shape of H₃O⁺ is

Answer

Tetrahedral

Answer

Triangular planar

Question 17

17. XeF₄ has shape of

Answer

Trigonal bipyramidal

Answer

Tetrahedral

Answer

Square planar

Question 18

18. An electron has principal quantum number 3. The number of its (i) subshells and (ii) orbitals would be respectively

Question 19

19. Which of these molecules require more bond energy?

Question 20

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

Answer

Gamma rays

Answer

Larger wavelength

Answer

X-rays not produced

Answer

Shorter wavelength

Question 21

21. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Square planner

Answer

Triangular

Answer

Tetrahedral

Question 22

22. Geometry of simple molecule having SP³ hybrid orbital is

Answer

Square planner

Answer

Triangular

Answer

Tetrahedral

Question 23

23. 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 pressure 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

Question 24

24. 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

sp² hybrid orbitals

Answer

sp³ hybrid orbitals

Answer

s orbitals

Question 25

25. Bohr’s model atom is contradicted by

Answer

Quarternization of energy of electrons

Answer

Plank’s quantum theory

Answer

Quarternization of angular members

Answer

Heisenberg’s uncertainty principle

Question 26

26. Which carbon is more electronegative?

Answer

sp- hybridized carbon

Answer

always same irrespective of its hybrid state

Answer

sp²- hybridized carbon

Answer

sp³-hybridized carbon

Question 27

27. An oxygen atom has mass of

Answer

5.316 x 10¯²³ g

Answer

5.316 x 10¯²³ g

Answer

2.657 x 10¯²³ g

Question 28

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

Question 29

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

Answer

Octet rule

Answer

Electropositive character of elements

Answer

Pauli exclusion principle

Answer

Electronegative character of elements

Question 30

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

Question 31

31. 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

3 lone pair 1 bond pair

Answer

1 bond pair 3 lone pair

Question 32

32. Which has the minimum bond angle?

Question 33

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

Question 34

34. The electro negativities of F, Cl, Br and I are 4.0, 3.0, 2.8, 2.5 respectively. Hydrogen halide with a high percentage of ionic character is

Question 35

35. Effective magnetic moment of Sc³ ion is

Question 36

36. 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 37

37. The nature of positive rays depends upon

Answer

The nature of discharge tube

Answer

The nature of electrode

Answer

The nature of residual gas

Answer

All of these

Question 38

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

Answer

Dipole moment is zero

Answer

Linear geometry

Answer

SP hybridization

Question 39

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

Answer

Greater than 1.7

Answer

Equal to 1.7

Answer

Lesser then 1.7

Answer

No specificity exist

Question 40

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

Question 41

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

Answer

Square planar

Answer

Planar triangle

Answer

Tetrahedral

Question 42

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

Question 43

43. Fluorine molecule is formed by

Answer

The overlap of two sp² hybrid orbitals

Answer

The axial s-p overlap

Answer

The sidewise p-p overlap

Answer

The axial p-p overlap

Question 44

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

Answer

Seventh Bohr orbit to the third Bohr orbit

Answer

Fourth Bohr orbit to the first Bohr orbit

Answer

Sixth Bohr orbit to the third Bohr orbit

Answer

Fifth Bohr orbit to the second Bohr orbit

Question 45

45. 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 46

46. Ionic radius in a period from left to right

Answer

First decreases then increases

Answer

First increases then decreases

Question 47

47. The bond order in NO is 2.5 while that is NO⁺ is 3. Which of the following statements is true for these two species?

Answer

Bond length in NO is greater than in NO⁺

Answer

Bond length is unpredictable

Answer

Bond length in NO⁺ is equal to that in NO

Answer

Bond length in NO⁺ is greater than in NO

Question 48

48. Which of the following is not isoelectronic?

Question 49

49. Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?

Answer

None of these

Answer

Both A and B are correct

Answer

Orbital overlap will not occur

Answer

Bonding will not occur

Question 50

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

Answer

6.65 x 10¯³⁵ m

Answer

6.63 x 10¯³³ m

Answer

6.63 x 10¯³⁵ m

Answer

6.63 x 10¯³⁴ m

Question 51

51. The ionization energy

Answer

Increase from top to bottom in a group

Answer

Does not change in a period

Answer

Does not change in a group

Answer

Generally increases from left to right in a period

Question 52

52. 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 53

53. A student subtracted 0.00055 from 10.2345678 and reported the result as 10.23401. But his friend told him that result was wrong. What is the correct result?

Answer

10.2340178

Question 54

54. Lewis acids are

Answer

No such acids exist

Answer

Electron rich

Answer

Octet is complete

Answer

Electron deficient

Question 55

55. The shape of the molecule SF₂Cl₂ is

Answer

Trigonal bipyramidal

Answer

Octahedral

Answer

Tetrahedral

Question 56

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

Question 57

57. Which one of these is weakest?

Answer

Van der Waal’s forces

Answer

Metallic bond

Answer

Ionic bond

Answer

Covalent bond

Question 58

58. Unit of dipole moment is

Question 59

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

Question 60

60. Choose the correct statement about 2nd ionization energy

Answer

It is always less than 1st ionization energy

Answer

It is equal to the 1st ionization energy

Answer

It is always greater than 1st ionization energy

Answer

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

Question 61

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

Answer

First increases then decreases

Answer

First decreases then increases

Question 62

62. Bond angle in water is

Question 63

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

Question 64

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

Answer

Electron affinity

Answer

None of these

Answer

Ionization energy

Answer

Electro negativity

Answer 145

Tetrahedral

Answer 146

Triangular planar

Answer 147

Triangular bipyramidal

Answer 148

Triangular pyramidal

Answer 149

Hydrogen bond formation

Answer 150

Covalent attraction

Answer 151

Dipole interaction

Answer 152

Van der Waal’s forces

Answer 153

Five π and nine σ

Answer 154

Eight σ and eight π

Answer 155

Nine σ and seven π

Answer 156

Nine σ and nine π

Answer 157

Electronegativity

Answer 158

Atomic size

Answer 159

Electron affinity

Answer 160

Ionization energy

Answer 161

Activation energy

Answer 162

Ionization potential

Answer 163

Electron affinity

Answer 164

Electronegativity

Answer 165

Hydrogen sulphide

Answer 166

Hydrogen fluoride

Answer 167

Lesser than individual

Answer 168

Higher than individual

Answer 169

Impossible to predict

Answer 170

Move with speed as that of light

Answer 171

A stream of electrons

Answer 172

Charged particles

Answer 173

Can be deflected by magnetic fields

Answer 174

Hybrid orbitals

Answer 175

Atomic orbital and hybrid orbital

Answer 176

Un-hybrid orbitals

Answer 177

Hybrid and un hybrid orbitals

Answer 178

Dipole-dipole interaction

Answer 179

Ion-dipole interaction

Answer 180

Dispersion force

Answer 181

Equal to square

Answer 182

Depends on its wavelength

Answer 183

Depends on its source

Answer 184

Independent of its wavelength

Answer 185

All p-orbitals are involved

Answer 186

One p-orbital is involved

Answer 187

Four p-orbitals are involved

Answer 188

One s and 3 p-orbitals are involved

Answer 189

Ground state of fluorine atom

Answer 190

Excited state of neon

Answer 191

Excited state of fluorine

Answer 192

Excited state of O¯₂

Answer 193

Variable trend

Answer 194

Remain same

Answer 195

Octahedral

Answer 196

Trigonal bipyramidal

Answer 197

Square planner

Answer 198

Triangular

Answer 199

A pair of valence electrons not involved in bonding

Answer 200

A pair of electrons

Answer 201

A pair of electrons involved in bonding

Answer 202

A pair of valence electrons

Answer 203

Distorted tetrahedral

Answer 204

Octahedral

Answer 205

Planar triangle

Answer 206

Subtraction of atomic orbitals

Answer 207

None of these

Answer 208

Multiplication of atomic orbitals

Answer 209

Addition of atomic orbitals

Answer 210

Van der Waal’s force

Answer 211

Dispersion force

Answer 212

London force

Answer 213

Chemical bond

Answer 214

6 electrons

Answer 215

2 electrons

Answer 216

1 electron

Answer 217

4 electrons

Answer 218

Trigonal bipyramidal

Answer 219

Triangular

Answer 220

Tetrahedral

Answer 221

Trigonal bipyramidal

Answer 222

Square planar

Answer 223

Octahedral

Answer 224

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

Answer 225

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

Answer 226

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

Answer 227

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

Answer 228

4, 0, 0, ½

Answer 229

4, 1, 1, ½

Answer 230

4, 4, 0, ½

Answer 231

4, 1, 0, ½

Answer 232

1.7588 x 10²⁰

Answer 233

9.1095 x 10¯³¹

Answer 234

6.02 x 10²³

Answer 235

1.7588 x 10¹¹

Answer 236

Radio, visible, infrared, ultraviolet

Answer 237

Microwave, infrared, visible, ultraviolet

Answer 238

X – radiation, visible, infrared, microwave

Answer 239

Visible, ultraviolet, infrared, gamma rays

Answer 240

Water has higher molecular weight

Answer 241

Water molecules associate through hydrogen bonding

Answer 242

Sulphure has high electronegativity than oxygen

Answer 243

Hydrogen sulphide is a weak acid

Answer 244

Blue has higher wavelength

Answer 245

Blue is absorbed more easily

Answer 246

Blue has more energy

Answer 247

Blue is darker colour

Answer 248

Impossible to predict

Answer 249

Concentrated acids

Answer 250

All solvents

Answer 251

Polar solvents

Answer 252

Non-polar solvents

Answer 253

None of these

Answer 254

Electronegativity

Answer 255

Electron affinity

Answer 256

Ionization energy

Answer 257

One sigma bond and two pi-bonds

Answer 258

Three pi-bonds

Answer 259

Three sigma bonds

Answer 260

Two sigma bonds and one pi-bond

Answer 261

6.02 x 10²³ J/mol

Answer 262

10¯⁷ J/mol

Answer 263

6.02 x 10¹⁶ J/mol

Answer 264

Bond pair – bond pair repulsion only

Answer 265

Lone pair – lone pair repulsion only

Answer 266

Lone pair – bond pair repulsion only

Answer 267

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

Answer 268

Both polar covalent and hydrogen bonds

Answer 269

Hydrogen bonds only

Answer 270

Ionic and nonpolar hydrogen bonds

Answer 271

Nonpolar covalent bonds only

Answer 272

Noble gases

Answer 273

Alkali metals

Answer 274

Gun metals

Answer 275

Coinage metals

Answer 276

Ionic bond

Answer 277

Metallic bond

Answer 278

None of these

Answer 279

High, very negative

Answer 280

Low, positive or slightly negative

Answer 281

Low very negative

Answer 282

n = 1, l = 0

Answer 283

n = 2, l = 1

Answer 284

n = 2, l = 0

Answer 285

n = 1, l = 2

Answer 286

They are mono atomic gases

Answer 287

They have completely filled s and p orbitals

Answer 288

They do not react with one another

Answer 289

They have high ionization energies

Answer 290

First decreases then increases

Answer 291

Liquid HCl

Answer 292

Liquid NH3

Answer 293

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

Answer 294

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

Answer 295

Bonding molecular orbitals have low electron density between the two nuclei

Answer 296

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

Answer 297

Cannot be determined

Answer 298

Both are equal

Answer 299

1/2 x ɜ₀

Answer 300

2 covalent, one co-ordinate bond

Answer 301

Ionic bonds

Answer 302

2 sigma bonds

Answer 303

2π and one σ bond

Answer 304

All of above represent same entity

Answer 305

Attractive force

Answer 306

Interaction

Answer 307

Tetrahedron

Answer 308

By losing three electrons

Answer 309

By losing two electrons

Answer 310

By gaining two electrons

Answer 311

By gaining three electrons

Answer 312

Low ionization energy of sodium

Answer 313

Sublimation of metallic sodium to give yellow vapour

Answer 314

Photosensitivity of sodium

Answer 315

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

Answer 316

It has high heat of dissociation

Answer 317

It has high electronegativity

Answer 318

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

Answer 319

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

Answer 320

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

Answer 321

Remains constant

Answer 322

No unpaired electron

Answer 323

Two unpaired electron

Answer 324

One unpaired electron

Answer 325

None of these

Answer 326

Nuclei are stable

Answer 327

Molecules are stable

Answer 328

Nuclei are unstable

Answer 329

Molecules are unstable

Answer 330

Carbon dioxide

Answer 331

Carbon tetrachloride

Answer 332

Fluorides is more electronegative

Answer 333

Fluorides are more electronegative

Answer 334

NH₃ is pyramidal in shape while BF₃ is planar

Answer 335

Boron trifluoride is pyramidal in shape while NH₃ is planar

Answer 336

Diamagnetic character

Answer 337

Three unpaired electrons

Answer 338

Stability lower then O₂

Answer 339

Bond order of 2.5

Answer 340

Distillation

Answer 341

Vaporization

Answer 342

Colour spectrum

Answer 343

Crystallization

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