‫هـ‬1341 ‫ رمضان‬2 ‫ صيفي‬2 ‫أختبار دوري‬
D1) How many unpaired electrons are in Tin atom (50Sn)?
a- 2
b- 1
c- 6
d- 7
(Chap 6)
D2) How many total valance electrons are available for bonding in carbonate anion CO3-- ?
a- 16
b- 24
c- 26
d- 32
(Chap 8)
D3) How many bonds around carbon atom in carbonate anion CO3-- ?
a- 3
b- 6
c- 4
d- 8
(Chap 8)
D4) The formal charge on carbon atom in carbonate anion CO3-- ?
a- 0
b- +1
c- +2
d- +3
(Chap 8)
D5) Which one of these following atoms will lose an electron when forming ion.
a- Ca
b- Na
c- Cl
d- O
(Chap 7)
D6) The frequency of visible light having a wavelength 450 nm is:
a- 1.50 x 10-15 Hz
b- 6.66 x 10-14 Hz
c- 1.50 x 1015 Hz
d- 6.66 x 1014 Hz
(Chap 6)
D7) What is the energy of a mole of photons associated with visible light of wavelength 550 nm?
a- 218 J
b- 218 kJ
c- 218 x 10-4 J
d- 21.8 kJ
(Chap 6)
D8) What is the wavelength for a photon emitted during a transition from ni = 5 to nf = 4 in
the hydrogen atom?
(Chap 6)
a-4.050 nm b- 4054 nm c- 4.05 x 10-6 nm
d- 40.50 nm
D9) Which of these elements has the highest first ionization energy?
a- As
b- Cs
c- K
d- Ga
(Chap 7)
D10) The lowest electron affinity in the following atoms is:
a- F
b- N
c- O
d- C
(Chap 7)
D11) Which of these compounds is most likely to be ionic?
a- BaCl2
b- NCl3
c- PCl3
d- XeCl3
(Chap 7)
D12) How many orbitals have the following quantum numbers: n = 4, l = 3?
a- 7
b- 1 c- 5
d- 3
(Chap 6)
D13) Which of the following electronic transitions would emit the highest energy photon?
a- n = 2 to n = 1
b- n = 1 to n = 2
c- n = 5 to n = 4
d- n = 4 to n = 3 (Chap 6)
D14) What is the de Broglie associated with a 9.50 g Ping-Pong ball traveling by 16.0 m/s?
a- 4.36 x 10-24 nm
b- 4.36 x 1027 nm
(Chap 6)
-36
36
c- 4.36 x 10 nm
d- 4.36 x 10 nm
D15) A polar covalent bond would form in which one of these pairs of atoms?
a- H-Cl
b- F-F
c- H-I
d- I-Cl
(Chap 7)
D16) Fill the following table for an ideal gas:
(Chap 5)
a
b
P (atm)
5
4.47
a- 3.50 L & 2.02 mol
c- 35.0 L & 2.02 mol
V (L)
N (mol)
0.50
15.0
b- 0.35 L & 2.02 mol
d- 0.35 mL & 2.02 kg
1
T
1550C
404 K
D17) Which of the following gases will have the smallest density at the same specified
temperature and pressure?
(Chap 5)
a- H2
b- CH4
c- CO2
d- CCl2F2
D18) Which is the molecular weight of gas if it is found to weight 0.92 g with volume 1.500 L
at a pressure of 356 mmHg and a temperature of 22.5 0C?
(Chap 5)
a- 32
b- 28
c- 17
d- 44
D19) A balloon is filled to a volume of 400 mL at 25.00C. The balloon is then cooled at
constant pressure to a temperature of 150 K. What is the final volume of the balloon?
a- 0.201 L
b- 201 x 103 L
c- 201 L
d- 0.201 x 10-3 L
(Chap 5)
D20) An ideal gas is contained in a cylinder with a volume of 2.0 x 102 mL at a temperature
of 30 0C and pressure 710 torr. The gas is then compressed to a volume of 25 mL and
the temperature is raised to 8200C. What is the new pressure of the gas?
(Chap 5)
4
-4
a- 2.05 x 10 torr
b- 2.05 x 10 c- 205 torr
d- 0.205
D21) A mixture of four gases has a total pressure of 1400 mmHg at 298 K and contains 2.2
mol O2, 2.4 mol N2, 2.6 mol H2 and 2.8 mol Ar. The partial pressure of H2 is:
(Chap 5)
a- 364 mmHg
b- 308 mmHg
c- 392 mmHg
d- 336 mmHg
D22) What is the total capacity of electrons in an orbital with n = 3, l = 2?
a- 10
b- 2
c- 6
d- 14
(Chap 6)
D23) The bond between a positive and a negative ion is:
a- an ionic bond
b- a covalent bond
c- a double bond
d- a hydrogen bond
(Chap 7)
D24) Which of the following sets of quantum numbers refers to an electron in a 3p orbital?
a- n = 3, l = 1, ml = 0, ms = +1/2
b- n = 3, l = 0, ml = 0, ms = +1/2
(Chap 6)
c- n = 3, l = 3, ml = 3, ms = +1/2
d- n = 3, l = 2, ml = 1, ms = +1/2
D25) The electronic configuration of Co is:
a- [Ar] 4s2 3d7
b- [Ar] 3d7
c- [Ar] 4s1 3d6
D26) The S—ion, is not isoelectronic with:
a- Na+
b- K+
c- Cl-
(Chap 6)
d- c- [Ar] 4s1 3d7
(Chap 7)
d- S
2-
D27) Which Lewis structure is possible for N2O?
a- :N=N-O:
b-
c-
d-
(Chap 8)
‫سيتم شرح احلل خالل الساعات املكتبية‬
D28) The number of valance electrons in K atom is:
a- 1
b- 5
c- 2
d- 4
(Chap 8)
D29) Which of these ground-state atoms is para-amagnetic?
a- Fe
b- Zn
c- Mg
d- Ne
(Chap 7)
D30) Which of the following is a representive element (Main Groups)?
a- Pb
b- Na
c- Fe
d- Cu
(Chap 7)
(Chap 5) 6 + (Chap 6) 10 + (Chap 7) 9 + (Chap 8) 5
MCQ = 6 + 11 + 9 + 5 = 30
2