Chemistry Chemical Bonding Online Mcqs Test

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Question 1

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

Answer

Liquid HCl

Answer

Liquid NH3

Question 2

2. Which has the minimum bond angle?

Question 3

3. 2nd orbit is away from nucleus for H-atom as compared to first orbit

Question 4

4. Along a period the atomic radii

Answer

First decreases then increases

Question 5

5. H-bonding is not present in

Answer

Hydrogen fluoride

Answer

Hydrogen sulphide

Question 6

6. Anti-bonding MO is formed by

Answer

Subtraction of atomic orbitals

Answer

None of these

Answer

Addition of atomic orbitals

Answer

Multiplication of atomic orbitals

Question 7

7. Which of the following has unchanged valency?

Question 8

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

Answer

Atomic size

Answer

Electron affinity

Answer

Electronegativity

Answer

Ionization energy

Question 9

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

Question 10

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

Question 11

11. A lone pair of electrons in an atom implies

Answer

A pair of electrons involved in bonding

Answer

A pair of electrons

Answer

A pair of valence electrons

Answer

A pair of valence electrons not involved in bonding

Question 12

12. Which one of these is weakest?

Answer

Covalent bond

Answer

Ionic bond

Answer

Metallic bond

Answer

Van der Waal’s forces

Question 13

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

Answer

Eight σ and eight π

Answer

Nine σ and nine π

Answer

Five π and nine σ

Answer

Nine σ and seven π

Question 14

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

Answer

Variable trend

Question 15

15. Number of π-bonds in naphthalene is

Question 16

16. Bond angle in water is

Question 17

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

Question 18

18. In O2 each oxygen atom is hybridized

Question 19

19. The correct set of quantum numbers (n, l and m) respectively of the unpaired electron of chlorine atom is:

Question 20

20. 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 21

21. Bohr’s model atom is contradicted by

Answer

Quarternization of energy of electrons

Answer

Quarternization of angular members

Answer

Heisenberg’s uncertainty principle

Answer

Plank’s quantum theory

Question 22

22. Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

Answer

Sublimation of metallic sodium to give yellow vapour

Answer

Low ionization energy of sodium

Answer

Photosensitivity of sodium

Answer

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

Question 23

23. The velocity of photon is

Answer

Depends on its wavelength

Answer

Independent of its wavelength

Answer

Depends on its source

Answer

Equal to square

Question 24

24. When potassium metal is exposed to violet light

Answer

Ejection of electrons takes place

Answer

Ejection of some potassium atoms occurs

Answer

There is no effect

Answer

The absorption of electrons takes place

Question 25

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

Answer

None of these

Answer

Electron affinity

Answer

Ionization energy

Answer

Electro negativity

Question 26

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

Question 27

27. In BrF₃ molecule, the lone pairs occupy equatorial positions to minimize

Answer

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

Answer

Lone pair – lone pair repulsion only

Answer

Lone pair – bond pair repulsion only

Answer

Bond pair – bond pair repulsion only

Question 28

28. Noble gases are most stable of all other elements because

Answer

They have high ionization energies

Answer

They have completely filled s and p orbitals

Answer

They are mono atomic gases

Answer

They do not react with one another

Question 29

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

Answer

Ground state of fluorine atom

Answer

Excited state of neon

Answer

Excited state of fluorine

Answer

Excited state of O¯₂

Question 30

30. The central atom in BrF₅ has _?_ bonding pairs of electrons and _?_ non-bonding pairs of electrons.

Question 31

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

Question 32

32. 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 33

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

Answer

Octahedral

Answer

Distorted tetrahedral

Answer

Planar triangle

Question 34

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

Answer

2 electrons

Answer

1 electron

Answer

4 electrons

Answer

6 electrons

Question 35

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

Answer

None of these

Answer

Ionization energy

Answer

Electro negativity

Answer

Electron affinity

Question 36

36. 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 37

37. 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 38

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

Answer

Tetrahedron

Question 39

39. XeF₄ has shape of

Answer

Square planar

Answer

Trigonal bipyramidal

Answer

Tetrahedral

Question 40

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

Question 41

41. Unit of dipole moment is

Question 42

42. The structure of ICl₂¯ is

Answer

Square planar

Answer

Octahedral

Answer

Trigonal bipyramidal

Question 43

43. Bond order for N2 molecule is

Question 44

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

Answer

The repulsive force dominate the attractive forces

Answer

The attractive forces dominate the repulsive forces

Answer

They energy of atoms increases

Answer

The two atoms start ionization

Question 45

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

Question 46

46. Which carbon is more electronegative?

Answer

sp³-hybridized carbon

Answer

sp²- hybridized carbon

Answer

sp- hybridized carbon

Answer

always same irrespective of its hybrid state

Question 47

47. Molecular orbital picture of N₂ indicates

Answer

None of these

Answer

No unpaired electron

Answer

One unpaired electron

Answer

Two unpaired electron

Question 48

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

Question 49

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

Answer

First increases then decreases

Answer

First decreases then increases

Question 50

50. Pi bonds are produced by overlapping of

Answer

Hybrid and un hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid orbitals

Answer

Un-hybrid orbitals

Question 51

51. Lateral overlapping expected in

Answer

Ionic bond

Answer

Metallic bond

Question 52

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

Question 53

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

Answer

Three sigma bonds

Answer

Three pi-bonds

Answer

One sigma bond and two pi-bonds

Answer

Two sigma bonds and one pi-bond

Question 54

54. The shape of H₃O⁺ is

Answer

Triangular planar

Answer

Tetrahedral

Question 55

55. Nuclear radiation is emitted by those elements whose

Answer

Nuclei are stable

Answer

Molecules are stable

Answer

Molecules are unstable

Answer

Nuclei are unstable

Question 56

56. Which of the following orbitals have a dumb bell shape?

Question 57

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

Answer

Shorter wavelength

Answer

X-rays not produced

Answer

Gamma rays

Answer

Larger wavelength

Question 58

58. Al become isoelectronic with Ne

Answer

By gaining three electrons

Answer

By losing three electrons

Answer

By losing two electrons

Answer

By gaining two electrons

Question 59

59. Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to the highest energy

Answer

Radio, visible, infrared, ultraviolet

Answer

Visible, ultraviolet, infrared, gamma rays

Answer

X – radiation, visible, infrared, microwave

Answer

Microwave, infrared, visible, ultraviolet

Question 60

60. Molecular orbitals are filled according to

Answer

Hund’s rule

Answer

Pauli’s exclusion principle

Answer

Aufbau principal

Question 61

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

Question 62

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

Question 63

63. Which of these molecules require more bond energy?

Question 64

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

Answer 123

Ionization energy

Answer 124

None of these

Answer 125

Electron affinity

Answer 126

Electronegativity

Answer 127

6.63 x 10¯³⁴ m

Answer 128

6.65 x 10¯³⁵ m

Answer 129

6.63 x 10¯³³ m

Answer 130

6.63 x 10¯³⁵ m

Answer 131

3 lone pair 1 bond pair

Answer 132

2 bond pair 2 lone pair

Answer 133

1 bond pair 3 lone pair

Answer 134

3 bond pair one lone pair

Answer 135

Three unpaired electrons

Answer 136

Stability lower then O₂

Answer 137

Diamagnetic character

Answer 138

Bond order of 2.5

Answer 139

1/2 x ɜ₀

Answer 140

Noble gases

Answer 141

Gun metals

Answer 142

Alkali metals

Answer 143

Coinage metals

Answer 144

NH₃ is pyramidal in shape while BF₃ is planar

Answer 145

Fluorides are more electronegative

Answer 146

Boron trifluoride is pyramidal in shape while NH₃ is planar

Answer 147

Fluorides is more electronegative

Answer 148

Impossible to predict

Answer 149

Depends on the pressure in the discharge tube

Answer 150

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

Answer 151

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

Answer 152

Depends on the gas used in the discharge tube

Answer 153

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

Answer 154

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

Answer 155

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

Answer 156

Bonding molecular orbitals have low electron density between the two nuclei

Answer 157

Low very negative

Answer 158

Low, positive or slightly negative

Answer 159

None of these

Answer 160

High, very negative

Answer 161

Ionic and nonpolar hydrogen bonds

Answer 162

Both polar covalent and hydrogen bonds

Answer 163

Nonpolar covalent bonds only

Answer 164

Hydrogen bonds only

Answer 165

2 covalent, one co-ordinate bond

Answer 166

Ionic bonds

Answer 167

2 sigma bonds

Answer 168

2π and one σ bond

Answer 169

Tetrahedral

Answer 170

Planar triangle

Answer 171

Square planar

Answer 172

Trigonal bipyramidal

Answer 173

Tetrahedral

Answer 174

Triangular

Answer 175

One sigma, one pi

Answer 176

One sigma, two pi

Answer 177

Two sigma, one pi

Answer 178

Two sigma, two pi

Answer 179

Sulphure has high electronegativity than oxygen

Answer 180

Hydrogen sulphide is a weak acid

Answer 181

Water has higher molecular weight

Answer 182

Water molecules associate through hydrogen bonding

Answer 183

Triangular pyramidal

Answer 184

Triangular bipyramidal

Answer 185

Triangular planar

Answer 186

Tetrahedral

Answer 187

Remain same

Answer 188

Electropositive character of elements

Answer 189

Octet rule

Answer 190

Pauli exclusion principle

Answer 191

Electronegative character of elements

Answer 192

Does not change in a period

Answer 193

Increase from top to bottom in a group

Answer 194

Does not change in a group

Answer 195

Generally increases from left to right in a period

Answer 196

Each bonding molecular orbital can accommodate only one electron

Answer 197

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

Answer 198

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

Answer 199

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

Answer 200

Trigonal bipyramidal

Answer 201

Octahedral

Answer 202

Tetrahedral

Answer 203

Both are equal

Answer 204

Cannot be determined

Answer 205

All of these

Answer 206

Covalent forces

Answer 207

Van der Waal forces or London dispersion forces

Answer 208

Hydrogen bonds

Answer 209

Linear geometry

Answer 210

Dipole moment is zero

Answer 211

SP hybridization

Answer 212

Carbon dioxide

Answer 213

Carbon tetrachloride

Answer 214

Triangular

Answer 215

Square planner

Answer 216

Tetrahedral

Answer 217

Remains constant

Answer 218

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

Answer 219

Polar solvents

Answer 220

Non-polar solvents

Answer 221

Concentrated acids

Answer 222

All solvents

Answer 223

First decreases then increases

Answer 224

First increases then decreases

Answer 225

The axial p-p overlap

Answer 226

The overlap of two sp² hybrid orbitals

Answer 227

The axial s-p overlap

Answer 228

The sidewise p-p overlap

Answer 229

10¯⁷ J/mol

Answer 230

6.02 x 10¹⁶ J/mol

Answer 231

6.02 x 10²³ J/mol

Answer 232

n = 1, l = 2

Answer 233

n = 2, l = 1

Answer 234

n = 1, l = 0

Answer 235

n = 2, l = 0

Answer 236

No such acids exist

Answer 237

Octet is complete

Answer 238

Electron deficient

Answer 239

Electron rich

Answer 240

Bond length in NO⁺ is equal to that in NO

Answer 241

Bond length in NO⁺ is greater than in NO

Answer 242

Bond length in NO is greater than in NO⁺

Answer 243

Bond length is unpredictable

Answer 244

1.7588 x 10²⁰

Answer 245

9.1095 x 10¯³¹

Answer 246

1.7588 x 10¹¹

Answer 247

6.02 x 10²³

Answer 248

Octahedral

Answer 249

Square planner

Answer 250

Triangular

Answer 251

Trigonal bipyramidal

Answer 252

5.316 x 10¯²³ g

Answer 253

5.316 x 10¯²³ g

Answer 254

2.657 x 10¯²³ g

Answer 255

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

Answer 256

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

Answer 257

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

Answer 258

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

Answer 259

Triangular

Answer 260

Square planner

Answer 261

Tetrahedral

Answer 262

The nature of residual gas

Answer 263

The nature of discharge tube

Answer 264

All of these

Answer 265

The nature of electrode

Answer 266

Greater than 1.7

Answer 267

Lesser then 1.7

Answer 268

Equal to 1.7

Answer 269

No specificity exist

Answer 270

Orbital overlap will not occur

Answer 271

Both A and B are correct

Answer 272

None of these

Answer 273

Bonding will not occur

Answer 274

They are larger than the atoms from which they were formed

Answer 275

They are also known as cations

Answer 276

They are formed when electros are formed from atoms

Answer 277

They are smaller than the atoms from which they were formed

Answer 278

p orbitals

Answer 279

sp³ hybrid orbitals

Answer 280

s orbitals

Answer 281

sp² hybrid orbitals

Answer 282

Covalent bond

Answer 283

Double bond

Answer 284

Co-ordinate bond

Answer 285

Electrovalent bond

Answer 286

Seventh Bohr orbit to the third Bohr orbit

Answer 287

Fifth Bohr orbit to the second Bohr orbit

Answer 288

Fourth Bohr orbit to the first Bohr orbit

Answer 289

Sixth Bohr orbit to the third Bohr orbit

Answer 290

It is always greater than 1st ionization energy

Answer 291

It is equal to the 1st ionization energy

Answer 292

It is always less than 1st ionization energy

Answer 293

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

Answer 294

There may be a possibility of a chemical reaction

Answer 295

Water should be preferred over lemon Juice for drinking

Answer 296

There may not be a possibility of chemical reaction

Answer 297

Lemon juice is dangerous for health

Answer 298

Lesser than individual

Answer 299

Higher than individual

Answer 300

Impossible to predict

Answer 301

Covalent attraction

Answer 302

Dipole interaction

Answer 303

Hydrogen bond formation

Answer 304

Van der Waal’s forces

Answer 305

London force

Answer 306

Chemical bond

Answer 307

Van der Waal’s force

Answer 308

Dispersion force

Answer 309

Four p-orbitals are involved

Answer 310

One s and 3 p-orbitals are involved

Answer 311

One p-orbital is involved

Answer 312

All p-orbitals are involved

Answer 313

H – NH₂

Answer 314

Move with speed as that of light

Answer 315

Charged particles

Answer 316

Can be deflected by magnetic fields

Answer 317

A stream of electrons

Answer 318

All of above represent same entity

Answer 319

Interaction

Answer 320

Attractive force

Answer 321

Distillation

Answer 322

Colour spectrum

Answer 323

Crystallization

Answer 324

Vaporization

Answer 325

Dispersion force

Answer 326

Dipole-dipole interaction

Answer 327

Ion-dipole interaction

Answer 328

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

Answer 329

It has high heat of dissociation

Answer 330

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

Answer 331

It has high electronegativity

Answer 332

4, 1, 1, ½

Answer 333

4, 1, 0, ½

Answer 334

4, 0, 0, ½

Answer 335

4, 4, 0, ½

Answer 336

Electronegativity

Answer 337

Ionization potential

Answer 338

Activation energy

Answer 339

Electron affinity

Answer 340

Blue is darker colour

Answer 341

Blue has higher wavelength

Answer 342

Blue is absorbed more easily

Answer 343

Blue has more energy

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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