Year 1 Pharmaceutical Chemistry Past Questions with Specific
Answers
1. ATOMIC STRUCTURE 2g x 35.5 = 71g
2 g of chlorine gas contains how many Ans: 2g / 71g × 6.02 x 10^23
mol- ecules? (atomic mass of Cl =
35.5 g mol-1; L
= 6.02 x 10^23 mol-1)
Nitrogen-14 is composed of 7
2. What is the electron configuration protons, 7 neutrons, and 7
for a Ni- trogen-14 nuclide? electrons
Ans: 1s2 2s2 2p3
3. Which orbitals are permitted with a principal s, p and d orbitals
quantum number of 3?
4. How many 3d orbitals are there? Ans: 5
5. If the electron configuration of 1s2 2s2 2p6
Magnesium is [Ne] 3s2, what is the
electron configura- tion of Mg2+?
6. The Azimuthal quantum number Shape
describes which property of an
electron?
Dumbbell
7. Which shape describes the volume
of a p orbital?
8. Which statement about Pauli exclusion prin- Electrons have a unique set o
quantum
ciple is TRUE? numbers.
9. What is the mass of a neutron The same mass
compared to that of a proton?
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58
, Year 1 Pharmaceutical Chemistry Past Questions with Specific
Answers
10. Which form of electromagnetic radiation has Ultraviolet
the lowest wavelength of those listed?
2/
58
, Year 1 Pharmaceutical Chemistry Past Questions with Specific
Answers
11. What is the electron configuration of the fol- 1) Carbon = 1s2 2s2 2p2
lowing; 2) Sodium = 1s2 2s2 2p6 3s1
1) Carbon 3) Magnesium = 1s2 2s2 2p6 3s2
2) Sodium 4) Helium = 1s2
3) Magnesium 5) Fluoride ion = 1s2 2s2 2p6
4) Helium
5) Fluoride ion
12. MOLECULAR STRUCTURE Carbon tetrabromide (CBr4)
Which molecule has a dipole moment of 0
C m?
13. What type and number of bonds are present 6 Sigma bonds and 2 π
bonds
in Propyne (CH3CCH)?
14. What type of orbitals do the carbon sp3
atoms have in ethane (CH3CH3)?
15. What is the shape of the molecule Octahedral
sulfur hexafluoride?
16. Which statement concerning bond Bond energies are always negative.
energy or bond length is INCORRECT?
*Is CORRECT;
1) The bond energy of the
bond in methane is less than
that in ammonia.
2) The bond energy of the bond
in an oxygen molecule is greater
than that in a chlorine molecule.
3) The bond length in HBr is
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58
, Year 1 Pharmaceutical Chemistry Past Questions with Specific
Answers
greater than in HF.
4/
58
Answers
1. ATOMIC STRUCTURE 2g x 35.5 = 71g
2 g of chlorine gas contains how many Ans: 2g / 71g × 6.02 x 10^23
mol- ecules? (atomic mass of Cl =
35.5 g mol-1; L
= 6.02 x 10^23 mol-1)
Nitrogen-14 is composed of 7
2. What is the electron configuration protons, 7 neutrons, and 7
for a Ni- trogen-14 nuclide? electrons
Ans: 1s2 2s2 2p3
3. Which orbitals are permitted with a principal s, p and d orbitals
quantum number of 3?
4. How many 3d orbitals are there? Ans: 5
5. If the electron configuration of 1s2 2s2 2p6
Magnesium is [Ne] 3s2, what is the
electron configura- tion of Mg2+?
6. The Azimuthal quantum number Shape
describes which property of an
electron?
Dumbbell
7. Which shape describes the volume
of a p orbital?
8. Which statement about Pauli exclusion prin- Electrons have a unique set o
quantum
ciple is TRUE? numbers.
9. What is the mass of a neutron The same mass
compared to that of a proton?
1/
58
, Year 1 Pharmaceutical Chemistry Past Questions with Specific
Answers
10. Which form of electromagnetic radiation has Ultraviolet
the lowest wavelength of those listed?
2/
58
, Year 1 Pharmaceutical Chemistry Past Questions with Specific
Answers
11. What is the electron configuration of the fol- 1) Carbon = 1s2 2s2 2p2
lowing; 2) Sodium = 1s2 2s2 2p6 3s1
1) Carbon 3) Magnesium = 1s2 2s2 2p6 3s2
2) Sodium 4) Helium = 1s2
3) Magnesium 5) Fluoride ion = 1s2 2s2 2p6
4) Helium
5) Fluoride ion
12. MOLECULAR STRUCTURE Carbon tetrabromide (CBr4)
Which molecule has a dipole moment of 0
C m?
13. What type and number of bonds are present 6 Sigma bonds and 2 π
bonds
in Propyne (CH3CCH)?
14. What type of orbitals do the carbon sp3
atoms have in ethane (CH3CH3)?
15. What is the shape of the molecule Octahedral
sulfur hexafluoride?
16. Which statement concerning bond Bond energies are always negative.
energy or bond length is INCORRECT?
*Is CORRECT;
1) The bond energy of the
bond in methane is less than
that in ammonia.
2) The bond energy of the bond
in an oxygen molecule is greater
than that in a chlorine molecule.
3) The bond length in HBr is
3/
58
, Year 1 Pharmaceutical Chemistry Past Questions with Specific
Answers
greater than in HF.
4/
58
