TES CHEMISTRY CLASS XI IPA SEM -1

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:

CaCO_3(s)  +  2HCl_(aq) ®     CaCl_2(aq) + H₂CO_3(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) ®  XY_3(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

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 A_r: 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 … (A_r: 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 H_{2 (g)}  +   O_{2 (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:

       ∆H⁰_f  C₃H_{8 (g)}    =  - 104  Kj /mol

       ∆H⁰_f  CO₂ (g)     =  - 394 Kj / mol

       ∆H⁰_f  H2O(l)      =  - 286 Kj / mol

 DH for reaction of :

C3H8 (g₎  + 5 O_{2 (g)}   ® 3CO_{2 (g)} + 4H₂O _(l) 
Is….

a.  –1034 kj                       d.   +1134 kj

b.  – 2222 kj                      e.    –2430 kj

c.  –1134 kj          

22.   Given that a reaction:

N_{2 (g)}  +   3 H_{2 (g)}  →2 NH_{3 (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 :

CH_{4 (g)} + Cl_{2 (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 ;

N_2(g) + 3H_2(g) ↔ 2NH_3(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 ;

2SO_{3 (g)}   ↔  2SO_{2 (g)}  +  O_2(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 :

2NO_2(g)  ↔ 2NO_(g)  +  O_{2 (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 %