Organic Chemistry Test Bank – Chapter 1In every slide, you will find a question with 2 – 5 choices.

The answers of the questions will be in the last slide, so don’t forget to write your answers (To check them 💪).

*** You can use the periodic table anytime 😊.

1. How many electrons, protons, & neutrons in an Atom X (Atomic no. is 19, mass no. is 39)?

A. (20, 20, 19).

B. (20, 19, 20).

C. (19, 19, 20).

D. Can’t be determined.

2. How many electrons will there be in the outer energy shell of an atom of X (Atomic no. is 19, mass no. is 39)?

A. 1.

B. 9.

C. 19.

D. None of the above.

3. What is the electronic configuration of X (Atomic no. is 19, mass no. is 39)?

A. 2 – 8 – 8 – 1.

B. 2 – 8 – 9.

C. 1S2 / 2S2 2P6 / 3S2 3P6 / 4S1.

D. A + C

4. Based on what you see in the figure below, between which two atoms is there a double covalent bond?

A. C & O.

B. C & H.

C. C & C.

D. O & H.

5. Based on what you see in the figure below, how many single covalent bonds does each carbon atom have?

A. 4.

B. 6.

C. 7.

D. 8.

6. Which element (Q, R, S, T, X) has 22 neutrons?

A. S.

B. T.

C. X.

D. Q.

E. R.

ElementAtomic

NumberMass

NumberElectronic structure

Q 3 7 2, 1

R 20 40 2, 8, 8, 2

S 18 40 2, 8, 8

T 8 18 2, 6

X 19 39 2, 8, 8, 1

7. Which element (Q, R, S, T, X) is a noble gas?

A. S.

B. T.

C. X.

D. Q.

E. R.

ElementAtomic

NumberMass

NumberElectronic structure

Q 3 7 2, 1

R 20 40 2, 8, 8, 2

S 18 40 2, 8, 8

T 8 18 2, 6

X 19 39 2, 8, 8, 1

8. Which two elements form ions with the same electronic structure as 18Ar?

A. S & R.

B. R & X.

C. Q & X.

D. Q & T.

E. R & T.

ElementAtomic

NumberMass

NumberElectronic structure

Q 3 7 2, 1

R 20 40 2, 8, 8, 2

S 18 40 2, 8, 8

T 8 18 2, 6

X 19 39 2, 8, 8, 1

9. Which two elements are in the same group of the periodic table, and which group is this?

A. S & T, 7.

B. Q & X, 1.

C. Q & X. 7.

D. Q & X, 5.

E. Q & T, 3.

ElementAtomic

NumberMass

NumberElectronic structure

Q 3 7 2, 1

R 20 40 2, 8, 8, 2

S 18 40 2, 8, 8

T 8 18 2, 6

X 19 39 2, 8, 8, 1

10. Organic chemistry is currently defined as:

A. The study of compounds made only by living cells.

B. The study of carbon compounds.

C. The study of natural (as opposed to synthetic) compounds.

D. The study of hydrocarbons.

11. Which of these orbitals are not correct?

A. 3s.

B. 4f.

C. 2d.

D. 3d.

12. What is the number of unpaired electrons in (30Zn+2, 17Cl, 26F+3)?

A. (0, 7, 3).

B. (0, 7, 0).

C. (0, 1, 5).

D. (0, 1, 0).

13. What is the atomic number of an element with valence of 2P6 and -2 charge?

A. 6.

B. 8.

C. 10.

D. 12.

14. What is isotopes?

A. Two atoms with the same molecular formula, but different structural formula.

B. Two atoms with the same structural formula, but different molecular formula.

C. Two atoms with the same atomic number, but different mass number.

D. Two atoms with the same mass number, but different atomic number.

E. Two atoms with the same neutrons’ number, but different protons’ number.

15. Which of these orbitals has more energy?

A. 4d.

B. 2p.

C. 3f.

D. 1s.

16. Which of the following arranges the bonds in order of decreasing polarity?

A. Cl – F > H – I > Se – N.

B. Se – N > H – I > Cl – F.

C. H – I > Se – N > Cl – F.

D. Cl – F > Se – N > H – I.

Element Electronegativity

H 2.2

N 3.0

F 4.0

Cl 3.2

Se 2.6

I 2.7

17. Which of the following correctly shows the bond polarity?

A. 𝛿+Cl - Cl𝛿−.

B. 𝛿+Br - F𝛿−.

C. 𝛿+S - Si𝛿−..

D. 𝛿+O - P𝛿−.

18. Which of the following best predicts the type of bond that forms between Br and Br?

A. Nonpolar covalent bond.

B. Polar covalent bond.

C. Ionic bond.

D. Metallic bond.

19. Which of the following bonds is likely to have the most ionic character?

A. Si – S.

B. K – Cl.

C. P – Cl.

D. Ca – S.

20. The Lewis structure of I2 is shown below. Which of the following compounds has a Lewis structure that is electronically identical to that of I2?

A. HCl.

B. CO.

C. N2.

D. BrF.

21. The number of isomers for CH3CH2CH3 is:

A. 1.

B. 2.

C. 3.

D. 4.

E. 5.

22. Which of these compounds is represented in the picture below?

A. CH3CH2CHCH3CHOH.

B. CH3CH2CH2CH3CH2OH.

C. CH3CH2CHCH3CH2Cl.

D. CH3CH2CHCH3CH2OH.

23. __________ bond(s) is(are) a weak bond, formed from side-to-side overlapping.

A. Sigma σ.

B. Pi π.

C. Hybridization.

D. Sigma & Pi.

24. __________ bond(s) can be formed between s – s, s – p, and p - p.

A. Sigma σ.

B. Pi π.

C. Hybridization.

D. Sigma & Pi.

25. __________ bond(s) can be formed between p - p.

A. Sigma σ.

B. Pi π.

C. Hybridization.

D. Sigma & Pi.

26. __________ bond(s) is(are) a strong bond, formed from head-to-head overlapping.

A. Sigma σ.

B. Pi π.

C. Hybridization.

D. Sigma & Pi.

27. The picture below is a resonance structure:

A. True.

B. False.

28. Which of the following molecules does NOT have an atom that is sp-hybridized?

A. CO2-.

B. HC ≡ C-.

C. NO2.

D. NO2+.

29. What is the hybridization around the sulfur atom in H2S (H ― S ― H)?

A. sp.

B. sp2.

C. sp3.

D. sp4.

30. BeF2 has a linear shape. What is the hybridization around the Be atom in BeF2?

A. sp.

B. sp2.

C. sp3.

D. sp4.

31. Ethene has a trigonal planar shape. What is the hybridization around each carbon atom in ethene?

A. sp.

B. sp2.

C. sp3.

D. sp4.

32. In which of the following molecules is the central atom sp hybridized?

A. _

B. _

C. _

D. _

33. How many (Sigma & Pi) bonds in the compound below?

A. (3 & 8).

B. (8 & 3).

C. (9 & 2).

D. (2 & 9).

34. Consider the following reaction. When the reaction occurs, does the hybridization of the C atoms change?

A. Yes, it changes from sp to sp2.

B. Yes, it changes from sp to sp3.

C. Yes, it changes from sp2 to sp3.

D. No, it does not change.

35. According to the diagram, the C ― C sigma bond is formed by the overlap of:

A. One sp orbital and one sp3 orbital.

B. One sp2 orbital and one sp3 orbital.

C. Two sp orbitals.

D. Two sp2 orbitals.

36. __________ differ in the location of electrons. __________ differ in the location of atoms.

A. Hybridization – Isomers.

B. Hybridization – Resonance structure.

C. Isomers – Resonance structures.

D. Resonance structures - Isomers

37. How many functional groups are there in the compound below (No. of types)?

A. 2.

B. 3.

C. 4.

D. 5.

38. What functional groups can you find in the following compound?

A. Arene.

B. Amide.

C. Carboxylic Acid.

D. B + C.

E. A + B + C.

39. The compound below has a thioether functional group:

A. True.

B. False.

40. The compound below is represented in the __________.

A. Kekul structure.

B. Condensed structure.

C. Bond line formula.

D. Ball-and-Stick Model.

41. The type(s) of hybridization found in the figure below is(are):

A. sp.

B. sp2.

C. sp3.

D. All of the above.

42. The picture below represents isomers concept:

A. True.

B. False.

43. The compound below represents a(an):

A. Hydroxyl.

B. Alcohol.

C. Acid.

D. Base.

44. Which of the following best predicts the type of bond that forms between Cl and F?

A. Nonpolar covalent bond.

B. Polar covalent bond.

C. Ionic bond.

D. Metallic bond.

Element Electronegativity

H 2.2

N 3.0

F 4.0

Cl 3.2

Se 2.6

I 2.7

45. Which of the following orbitals has the largest amount of energy?

A. 3p.

B. 4s.

C. 3d.

D. 4p.

The key answers

Question No. Answers Question No. Answers Question No. Answers Question No. Answers Question No. Answers

1. C 10. B 19. B 28. C 37. C

2. A 11. C 20. D 29. C 38. E

3. D 12. C 21. A 30. A 39. A

4. A 13. B 22. D 31. B 40. C

5. B 14. C 23. B 32. D 41. D

6. A 15. A 24. A 33. B 42. A

7. A 16. A 25. D 34. B 43. B

8. B 17. B 26. A 35. B 44. B

9. B 18. A 27. B 36. D 45. D