1. X atom has the last electron with quantum number of n = 4, l = 1, m = +1 , s = -1/2 .
Atomic number of X element is....
a. 18 c. 35 e. 54
b. 33 d. 36
2. Electron configuration of Na ( Z = 11 ) is...
a. 1s2 2s2 2p 63s1
b. 1s2 2s2 2p 62d1
c. 1s2 2s2 2p 63p1
d. 1s2 2s2 2p 63d1
e. 1s2 2s2 2p 53s1
3 Element K with number atom 19 has electron configuration is …
a. 1s2 2s2 2p 63s2 3p6 4s2 3d10 4p6
b. 1s2 2s2 2p 63s2 3p6 4s1
c. 1s2 2s2 2p 63s2 3p6 4s2 3d10 4p6 5s1
d. 1s2 2s2 2p 63s2 3p6 4s2 3d10 4p6
e. 1s2 2s2 2p 63s2 3p6 4s2 3d10
4. The element in the same period have....
a. the same valence electron
b. the same shell number
a. the same physical properties
b. the same chemical properties
c. the same electron number
5. Br element has the atomic number of 35. In periodic table , that element is at.....
a. 3-th period , VI A group
b. 4-th period , VI A group
c. 5-th period , VIII A group
d. 3-th period , VII A group
e. 4-th period , VII A group
6. An element has electron configuration of :
1s2 2s2 2p 63s2 3p6 4s2 3d10 4p4
In periodic table , that element is at.....
a. 3-th period , VI A group
b. 4-th period , VI A group
c. 5-th period , VIII A group
d. 3-th period , VII A group
e. 4-th period , VII A group
7. X atom has electron configuration with quantum number of n = 3 , l = 2 , m = 0 , s = + ½ . Group and period for the X atom is….
a. II B ; 3 d. V B ; 4
b.. VA ; 3 e. III B ; 4
c. VIII B ; 4
8. Among of the following compounds, the nonpolar covalent molecul is ....
a. HCl d. H2O
b. KCl e. PCl3
c. NH3
9. Among of the following groups which ones all the components bond covalently are....
a. KCl , HF , Cl2
b. CO2 , CH4 , KCl
c. NH3 , HCl , H2O
d. F2 , HCl , K2O
e. NaCl , KCl , KI
10. If the atomic number of X element = 6 , and that of element = 1 , the shape of XY4 molecul is....
a. linier d. T-shaped
b. trigonal planar e. tetrahedron
c. V- shaped
11. 2.00 g sample of the crystal sodium hydroxide, NaOH, was dissolved in water to produce a total volume of exactly 200 cm3 of solution. What is the molar concentration of the solution?
a. 0.001 M d. 0.050 M
b 0.250 M e. 0.010 M
c 0.005 M
12. What is the molar concentration of 100 mL HCl 32%, if the density is 0.365 g mL-1?
(Ar H = 1, Cl = 35.5)
a. 8.77 M c. 0.32 M e 0.087 M
b. 3.20 M d. 0.87 M
13. For the solvation calcium carbonate, CaCO3, in hydrochloric acid, HCl, in various condition:
CaCO3(s) + 2HCl(aq) ® CaCl2(aq) + H2CO3(aq)
Which is the fastest rate?
a. | Broad surface CaCO3(s) | 1 M HCl | T= 25oC |
b. | Soft surface CaCO3(s) | 1 M HCl | T= 30oC |
c. | Broad surface CaCO3(s) | 2 M HCl | T= 35oC |
d. | Soft surface CaCO3(s) | 2 M HCl | T= 40oC |
e. | Broad surface CaCO3(s) | 1 M HCl | T= 40oC |
14. For the reaction X(g) + 3Y(g) ® XY3(g),
the following data were collected.
If the concentration of Y is doubled and at constant X concentration, the rate increases, by a factor of four.
If the concentration of X and Y is doubled, the rate increases by a factor of sixteen.
Rate law for condition above is ….
a. v = k [X]2[Y]2 d. v = k [X][Y]3
a. v = k [X]2[Y]2 d. v = k [X][Y]3
b. v = k [X][Y]4 e. v = k [X]3[Y]
c. v = k [X][Y]2
15. Consider the reaction for the decomposition of dinitrogen pentoxide, N2O5,
2 N2O5 ® 4NO2 + O2
If dinitrogen pentoxide is decomposing at a rate of 0.16 mol dm‑3 s-3, what is the rate NO2 being formed ….
a. 0.64 mol dm‑3 s-3
b. 0.16 mol dm‑3 s-3
c. 0.04 mol dm‑3 s-3
d. 0.32 mol dm‑3 s-3
e. 0.08 mol dm‑3 s-3
16. Into Allumunium sulfate, Al2(SO4)3, as much as 3.42 gram is added water so that solution volume is 2L. If given Ar: Al=27; S=32; O=16, so the solution molarity that formed is …
a. 0.5 M
b. 0.1 M
c. 0.05 M
d. 0.01M
e. 0.005M
17. The mass of oxalic acid, (H2C2O4.2H2O), that needed to make 100 mL oxalic acid solution 0.1M is … (Ar: C=12; H=1; O=16).
a. 1.26 gram
b. 3.15 gram
c. 6.30 gram
d. 12.60 gram
e. 31.50 gram
18. How many NaOH (Mr=40) that found in 750 mL of NaOH solution 0.2 M?
a. 2 gram
b. 3 gram
c. 6 gram
d. 8 gram
e. 12 gram
19. The boiling point of HF is greater than that of HCl . It is caused between the HF molecules are founds...
a. the covalent bond
b. the ionic bond
c. the hydrogen bond
d. the Van der waals force
e. coordination covalent bond
20. From the reaction of :
2 H2 (g) + O2 (g) →2 H2O (l) DH = -572 Kj
Can be conclude that….
a. The heat in water formation is – 286 kj
b. In formation of 1 mole of water the heat of 286 kj is required
c. In the combustion of 1 mole hydrogen the heat of 572 Kj is released
d. The heat in the formation of water vapor is –286 Kj
e. In the formation of 2 moles of water the heat of 286 Kj is released
21. Given that:
∆H0f C3H8 (g) = - 104 Kj /mol
∆H0f CO2 (g) = - 394 Kj / mol
∆H0f H2O(l) = - 286 Kj / mol
DH for reaction of :
C3H8 (g) + 5 O2 (g) ® 3CO2 (g) + 4H2O (l)
Is….
Is….
a. –1034 kj d. +1134 kj
b. – 2222 kj e. –2430 kj
c. –1134 kj
22. Given that a reaction:
N2 (g) + 3 H2 (g) →2 NH3 (g) DH = -34 Kj
The heat released when 14 grams of nitrogen gas reacts is…. ( Ar N = 14 )
a. 17 Kj d. 102 Kj
b. 34 Kj e. 136 Kj
c. 68 Kj
23. Given that :
CH4 (g) + Cl2 (g) ® CH3Cl (g) + HCl (g)
Data of bonded energy :
C - H = 413 Kj
Cl - Cl = 242 Kj
C – Cl = 328 Kj
H – Cl = 431 Kj
The change in enthalpy for the reaction above is…
a. - 104 Kj d. +208 Kj
b. +104 Kj e. –516 Kj
c. - 208 Kj
24. The dynamic equilibrium is a condition of a system representing that…..
a. the amount of moles of reactants is equal to that of product
b. the number of particles for every substance reacting is equal to the number of particles formed
c. opposite direction microscopically
d. macroscopically the reaction proceeds continuously
e. the products do not react further because the equilibrium has been reached
25. For reaction of ;
N2(g) + 3H2(g) ↔ 2NH3(g) ∆H = - 22 kcal,
the equilibrium constant decreases if …..
a. the temperature is decreased
b. the temperature is risen
c. the pressure is increased
d. the pressure is constant
e. NH3 gas is added
26. A mixture consists of SO3 , SO2 , and O2 gases in a equilibrium state at a certain temperature . The gases mixture at a constant temperature is pressed ( the pressure is increased ) , so….
a. The amount of SO2 moles increase
b. The amount of SO3 moles increase
c. The amount of O2 moles increase
d. The amount of SO2 and O2 moles increase
e. There are no the change in moles amount of substances which happens
27. Given that an equilibrium r5eaction :
2A(g) + B (g) ↔ A2B (g)
Initially A and B is reacted each of 2 moles in a container of 1 liter . In the equilibrium 0,5 moles of A is obtained , so the value of equilibrium constant (Kc) is….
a. 4,0 d. 1,2
b. 2,4 e. 0,6
c. 2,0
28. At a given temperature , in a container of 1 liter there is an equilibrium of ;
2SO3 (g) ↔ 2SO2 (g) + O2(g)
Initially there is 0,5 mole of SO3 and after being reached the equilibrium, the ratio of SO3 and O2 moles is 4 : 3 , the value of Kc is…..
a. 6,00 d. 0,33
b. 2,30 e. 0,23
c. 0,30
29. In volume of one liter there is 5 moles A2B2 gases dissociated according to the quation
A2B2 ↔ 2A(g) + 2 B(g)
If at the equilibrium there is 2 moles of A , the Kc of the reaction above is ….
a. 16 d. 1
b. 4 e. 4/5
c. 4/3
30. At an equilibrium of :
2NO2(g) ↔ 2NO(g) + O2 (g)
The mole ratio of NO2 and O2 is 2 : 1 ,
Dissociation degree of NO2 in percent is….
a. 90 % d. 50 %
b. 80 % e. 30 %
c. 75 %