Question 2 An object is moving at a speed of 220 m/s and the frequency associated with its de Broglie’s wavelength was determined to be 6.91 x 1014 Hz. Calculate the mass (kg) of the object and choose the correct answer from the given choices.     7.939 x 10-30 kg     7.939 x 10-29 kg     6.939 x 10-30 kg     5.939 x 10-31 kg Question 3

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Chapter7: Quantum Theory Of The Atom
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Question 2

An object is moving at a speed of 220 m/s and the frequency associated with its de Broglie’s wavelength was determined to be 6.91 x 1014 Hz. Calculate the mass (kg) of the object and choose the correct answer from the given choices.

   

7.939 x 10-30 kg

   

7.939 x 10-29 kg

   

6.939 x 10-30 kg

   

5.939 x 10-31 kg

Question 3

 

Choose (from given options) the correct IUPAC name for the compound shown above

 

   

1-ethyl-3,3-dimethylcyclohaxane

   

1,1-dimethyl-3-ethylcylohexene

   

1-Ethyl-3,3-dimethylcyclohexene

   

None of the provided IUPAC names is correct

Question 5

Consider a compound with a formula: C5H10O (5 carbons, 10 hydrogens, one oxygen). A correct IUPAC name for one of ketone isomers of this compound is

   

3-Methybutanal

   

4-Methylbutanone

   

3-Methylbutanone

   

None of the above

Question 6

Calculate the wavelength associated with the transition of electron from n = 4 to n = 2.

   

486 nm

   

396 nm

   

525 nm

   

None of the above

  •  

Question 7

The reaction of 2,2,4-Trimethyl-3-hexene with  hydrogen iodide (HI) will produce an alkyl halide product. The correct IUPAC name of the formed product is?

   

2,2,4- Trimethyl-4-Iodohexane.

   

3-Iodo-3,5,5-trimethylhexane

   

3-Iodo-3,5,5-trimethylhexene

   

3-Iodo-2,2,4-trimethylhexane

Question 8

 

The correct IUPAC name for the compound show above is?

   

2-Methyl-3-ol-4-propyl-4-octene

   

(Z)-2-Methyl-4-propyl-3-ol-4-octene

   

2-Methyl-4-isopropane-4-octene-3-ol

   

(E)-2-Methyl-4-propyl-4-octene-3-ol

  •  

Question 10

Calculate the change in energy involved in the transition of electrons from  n = 4  to n = 2 . Was the energy emitted or absorbed during this transition?

   

− 4.008 x 10-19 J, emitted

   

3.048 x 10-19 J, emitted

   

− 5.16 x 10-17 J, absorbed

   

4.008 x 10-18 J, absorbed

Question 11

Consider an orbital subshell with n = 5 and l = 3. Determine the correct designation of this subshell and the total number of orbitals it contains. Choose the correct answer from provided options

   

5d, total number of orbitals: 7

   

5f, total number of orbitals: 5

   

5d, total number of orbitals: 5

   

None of the above

Question 12

 

 

Ammonia is produced directly from nitrogen and hydrogen by using the Haber process. The resulting chemical reaction is expressed as:

        N2(g)    3H2(g)       2NH3(g)

 Calculate the enthalpy change for the reaction and indicate the correct answer from options provided and further conclude if the reaction is endothermic or exothermic. Use Table provided with standard constant values for bonds broken/formed                                                                             

   

89 kJ, Exothermic reaction

   

-92 kJ, Endothermic reaction.

   

-97 KJ, Exothermic reaction

   

80 kJ, Endothermic reaction

Question 13

 

Above is a set of atomic orbitals. Note that not all of them are correctly presented. Which of these (from given options) has/have the correctly presented atomic orbitals?

   

d and e

   

e only

   

a and d

   

d only

Question 15

Which of the following statements is incorrect about atomic orbitals?

   

It describes the trajectory of electron in an atom

   

It is a single electron  wave function

   

It defines the distribution of electron density in space

   

It can be represented by boundary surface diagram.

Question 16

 

The following figure is a representation of atomic electronic configurations of different elements. In the order from top to bottom, the represented elements are:?

   

Oxygen

Fluorine

Nitrogen

Neon

   

Nitrogen

Oxygen

Fluorine

Neon

   

Nitrogen

Fluorine

Neon

Na+

   

None of the above sets is correct

Question 17

 

The correct IUPAC name for the compound shown in the figure above is?  

   

1-Methyl-2-methylcyclohaxane

   

Trans-1-methyl-2-chlorocyclohexane

   

Trans-1-chloro-2-methylcyclohexane

   

Cis-1-chloro-2-methylcyclohexene

Question 19

A laser emits light of a certain frequency corresponding to a wavelength of 564 nm. If the total energy for this radiation is calculated to be 3.2 x 10-4 J, what is the total number of photons emitted?                                                                                                                           

 

   

7.318 x 1014 photons

   

9.482 x 1015 photons

   

8.398 x 1017 photons

   

9.398 x 1014 photos

Question 20

 

The valence subshells of Nitrogen are incorrectly presented in most cases in the figure above. Choose one case (a-e) where it is correctly presented

 

   

a)

   

e)

   

c) and e)

   

d)

question 21

 

The correct IUPAC naming for the compound above is

   

2-Ethyl-3-pentene

   

(Z)-4-Ethyl-2-pentene

   

(E)-4-Ethyl-2-pentene

   

(E)-4-Methyl-2-hexene

Question 22

 

Consider the diagram shown above. The 2p orbitals for Oxygen were filled with electrons using which rule and/or principle?

 

   

Pauli exclusion principle

   

Hund's rule

   

Hund's Rule and Schrodinger atomic model

   

Hund's rule and Pauli exclusion principle

Question 23

 

Shown above in the figure above is a set of 3 general types of organic reactions. Select from the set of answer given, the correct general names for each type of reaction in the order from the top to the bottom

 

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