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| By 101salman

101salman

Community Contributor

Quizzes Created: 7 | Total Attempts: 240,846

Questions: 40 | Attempts: 5,737 | Updated: Mar 22, 2023

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Questions and Answers

1.

Konfigurasi electron X²^- dari suatu ion unsur ₁₆X³² adalah….
- A.
  
  1s² 2s²2p⁶ 3s² 3p²
- B.
  
  1s² 2s²2p⁶ 3s²3p⁴
- C.
  
  1s² 2s²2p⁶ 3s²3p⁶
- D.
  
  1s² 2s²2p⁶ 3s²3p⁶3d²
- E.
  
  1s² 2s²2p⁶ 3s²3p²3d²
Correct Answer
C. 1s² 2s²2p⁶ 3s²3p⁶

Explanation
The given electron configuration represents the ion of an element with atomic number 16 and a charge of -2. The electron configuration shows that there are 16 electrons in the atom. The first energy level (n=1) has 2 electrons (1s2), the second energy level (n=2) has 8 electrons (2s2 2p6), and the third energy level (n=3) has 6 electrons (3s2 3p6). This configuration satisfies the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a stable configuration with 8 valence electrons. Therefore, the correct answer is 1s2 2s2 2p6 3s2 3p6.

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1
0
2.

Letak unsur X dengan nomor atom 26 dan nomor massa 56, dalam system periodic pada golongan dan periode….
- A.
  
  II A dan 6
- B.
  
  VI B dan 3
- C.
  
  VIB dan 4
- D.
  
  VIIIB dan 3
- E.
  
  VIIIB dan 4
Correct Answer
E. VIIIB dan 4

Explanation
The element with atomic number 26 and mass number 56 belongs to group VIIIB and period 4 in the periodic table.

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3.

Senyawa M mempunyai sifat sebagai berikut: 1. mudah larut dalam air 2. dapat menghantar listrik dalam fase cair; 3. titik didihnya dan titik lelehnya tinggi Jenis ikatan dalam senyawa M tersebut adalah…
- A.
  
  Kovalen polar
- B.
  
  Kovalen non polar
- C.
  
  Hydrogen
- D.
  
  Logam
- E.
  
  Ion
Correct Answer
E. Ion

Explanation
The given compound M exhibits properties such as being easily soluble in water, conducting electricity in the liquid phase, and having high boiling and melting points. These characteristics suggest that the compound M is made up of ions. Ions are formed when atoms gain or lose electrons, resulting in the formation of charged particles. These charged particles are capable of conducting electricity and have high boiling and melting points due to the strong electrostatic forces between them. Therefore, the correct answer is Ion.

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4.

Perhatikan gambar pengujian daya hantar beberapa larutan berikut ini Larutan yang bersifat elektrolit kuat dan elektrolit lemah berturut turut adalah….
- A.
  
  1 dan 2
- B.
  
  1 dan 3
- C.
  
  1 dan 5
- D.
  
  2 dan 3
- E.
  
  4 dan 5
Correct Answer
A. 1 dan 2

Explanation
The correct answer is 1 dan 2. This means that the solutions that exhibit strong and weak electrolytes are options 1 and 2.

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5.

Di daerah bukit kapur, air sukar berbuih. Hal ini disebabkan terjadi kesadahan sementara pada air tersebut. Kesadahan sementara tersebut dapat dihilangkan dengan pemanasan. Persamaan reaksi setara yang tepat adalah…
- A.
- B.
- C.
- D.
- E.
Correct Answer
D.

Explanation
The given statement explains that in the limestone hill area, water is difficult to foam. This is because there is temporary hardness in the water. Temporary hardness can be removed by heating. Therefore, the correct answer would be the equation that represents the removal of temporary hardness by heating.

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6.

Tahap awal pembuatan asam nitrat dalam industri melibatkan reaksi oksidasi ammonia yang menghasilkan nitrogen monoksida dan uap air menurut reaksi berikut ini; Volume nitrogen monoksida yang dihasilkan pada reaksi 6 liter gas ammonia (P,T) 4 liter adalah…
- A.
  
  4 liter
- B.
  
  6 liter
- C.
  
  10 liter
- D.
  
  12 liter
- E.
  
  14 liter
Correct Answer
B. 6 liter

Explanation
The volume of nitrogen monoxide produced in the reaction is directly proportional to the volume of gas ammonia used. Since 6 liters of gas ammonia is used, the same volume of nitrogen monoxide, which is 6 liters, will be produced.

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7.

Data percobaan pH beberapa larutan: Larutan yang mempunyai sifat penyangga adalah….
- A.
  
  I dan II
- B.
  
  II dan III
- C.
  
  III dan IV
- D.
  
  III dan V
- E.
  
  IV dan V
Correct Answer
B. II dan III

Explanation
The correct answer is II and III. This is because buffer solutions are able to resist changes in pH when small amounts of acid or base are added. In this case, solutions II and III are likely to be buffer solutions as they have the ability to maintain a relatively constant pH value despite the addition of acids or bases.

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8.

Perhatikan data pengujian pH beberapa sample air limbah berikut! Air limbah yang tercemar asam adalah….
- A.
  
  P dan Q
- B.
  
  Q dan T
- C.
  
  R dan S R dan S R dan S R dan S R dan S
- D.
  
  S dan T
- E.
  
  T dan R
Correct Answer
B. Q dan T
9.

Berikut data hasil titrasi larutan HCl dengan NaOH 0,1 M Berdasarkan data tersebut, konsentrasi larutan HCl adalah….
- A.
  
  0,070 M
- B.
  
  0,075 M
- C.
  
  0,080 M
- D.
  
  0,133 M
- E.
  
  0,143 M
Correct Answer
B. 0,075 M
10.

Perhatikan diagram P-T berikut: garis beku pelarut ditunjukkan oleh
- A.
  
  MS
- B.
  
  MN
- C.
  
  KL
- D.
  
  LR
- E.
  
  KQ
Correct Answer
D. LR

Explanation
The correct answer is LR. In the given P-T diagram, the freezing line of the solvent is represented by the LR line. This line indicates the temperature and pressure conditions at which the solvent transitions from a liquid state to a solid state. Therefore, LR is the correct answer for the freezing line of the solvent in the diagram.

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11.

Sebanyak 100 mL larutan CH₃COOH 0,2 M dicampur dengan 100 mL larutan NaOH 0,2 M. JIka Ka CH₃COOH = 1 . 10^-5, maka pH larutan setelah dicampur adalah….
- A.
  
  2
- B.
  
  4
- C.
  
  5
- D.
  
  6
- E.
  
  9
Correct Answer
E. 9

Explanation
The given question involves the mixing of a 0.2 M solution of CH3COOH (acetic acid) with a 0.2 M solution of NaOH (sodium hydroxide). When these two solutions are mixed, they undergo a neutralization reaction to form water and a salt, sodium acetate (CH3COONa). Since the concentration of both solutions is the same, the resulting solution will be approximately neutral, with a pH close to 7. However, acetic acid is a weak acid, and it does not completely dissociate in water. As a result, some acetic acid molecules will remain undissociated, leading to a slightly acidic pH. Therefore, the correct answer is 6, which represents a slightly acidic pH.

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12.

Perhatikan Persamaan reaksi berikut! (1). CH₃COO^- + H₂O →CH₃COOH + OH^- (2). CN^- + H₂O → HCN + OH^- (3). Al3+ + 3H₂O → Al(OH) +3H⁺ (4). NH4 + + H2O →NH₄OH + H⁺ (5). S^2- + 2H₂O → H₂S + 2OH^- Pasangan persmaan reaksi hidrolisis untuk garam yang bersifat asam adalah….
- A.
  
  1 dan 2
- B.
  
  1 dan 3
- C.
  
  2 dan 3
- D.
  
  3 dan 4
- E.
  
  4 dan 5
Correct Answer
A. 1 dan 2

Explanation
The correct answer is 1 dan 2. The given equations (1) and (2) represent hydrolysis reactions where water molecules split into H+ and OH- ions. In equation (1), CH3COO- reacts with water to form CH3COOH (acetic acid) and OH-. In equation (2), CN- reacts with water to form HCN (hydrocyanic acid) and OH-. Both equations show the formation of an acid (CH3COOH and HCN) and OH- ions, indicating that the salts in these reactions are acidic. Therefore, the correct answer is 1 dan 2.

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13.

Sebanyak 200 mL larutan AgNO₃ 0,02M,masing masing dimasukkan ke dalam 5 wadah yang berisi 5 jenis larutan yang mengandung ion S^2-, PO₄³-, CrO₄^2-, Br, danSO₄ ^2- dengan volume dan molaritas yang sama. Jika harga Ksp dari : Ag₂S = 2 . 10^-49 Ag₃PO₄ = 1 . 10^-20 Ag₂CrO₄ = 6 . 10^-5 AgBr = 5 . 10-¹³ Ag₂SO₄ = 3 . 10^-5 Maka garam yang akan larut adalah….
- A.
  
  Ag₂S dan Ag₃PO₄
- B.
  
  Ag₂S dan AgBr
- C.
  
  Ag₂CrO₄dan Ag₂SO₄
- D.
  
  Ag₃PO₄dan AgBr
- E.
  
  AgBr dan Ag₂SO₄
Correct Answer
C. Ag₂CrO₄dan Ag₂SO₄

Explanation
The question states that 200 mL of a 0.02 M AgNO3 solution is added to 5 containers, each containing solutions with the same volume and molarity of S2-, PO43-, CrO42-, Br, and SO42- ions. The solubility product constant (Ksp) values for Ag2S, Ag3PO4, Ag2CrO4, AgBr, and Ag2SO4 are given. The Ksp values represent the equilibrium constant for the dissolution of each compound. The compound with the highest Ksp value will have the highest solubility and therefore will dissolve in the solution. Comparing the Ksp values, Ag2CrO4 and Ag2SO4 have the highest values, indicating that they will be the salts that dissolve in the solution.

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14.

Perhatikan contoh penerapan sifat koloid berkut: 1. Sorot lampu mobil pada saat kabut 2. Pembentukan delta di muara sungai 3. Proses cuci darah 4. gelatin dalam es krim 5. pemutihan gula tebu Contoh yang merupakan penerapan sifat adsorpsi adalah….
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
- E.
  
  5
Correct Answer
E. 5

Explanation
The example that is a application of adsorption property is the whitening of sugar cane.

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15.

Perhatikan beberapa proses pembuatan koloid berikut: 1 H₂S ditambahkan ke dalam endapan NiS 2. sol logam dibuat dengan cara busur bredig 3. larutan AgNO₃ diteteskan ke dalam larutanHCl 4. Larutan FeCl₃ diteteskan ke dalam airmendidih; 5. Agar agar dipeptisasi dalam air Contoh penmbuatan koloid dengan cara kondensasi adalah….
- A.
  
  1 dan 2
- B.
  
  1 dan 3
- C.
  
  3 dan 4
- D.
  
  3 dan 5
- E.
  
  4 dan 5
Correct Answer
C. 3 dan 4

Explanation
The correct answer is 3 and 4. The process of condensation in colloid formation involves the aggregation of smaller particles to form larger particles. In option 3, the addition of AgNO3 to HCl results in the formation of AgCl, which is a colloid. In option 4, the addition of FeCl3 to boiling water leads to the formation of Fe(OH)3, which is also a colloid. Therefore, both options 3 and 4 involve the condensation process in colloid formation.

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16.

Jenis reaksi yang terjadi pada kedua persamaan reaksi tersebut berturut turut adalah….
- A.
  
  Adisi dan eliminasi adisi dan eliminasi adisi dan eliminasi
- B.
  
  Subtitusi dan adisi
- C.
  
  Eliminasi dan adisi
- D.
  
  Substitusi dan eliminasi
- E.
  
  Adisi dan substitusi adisi dan substitusi
Correct Answer
B. Subtitusi dan adisi

Explanation
The correct answer is "subtitusi dan adisi" because the first equation involves a substitution reaction, where one functional group is replaced by another, and the second equation involves an addition reaction, where two reactants combine to form a single product.

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17.

Isomer posisi dari pereaksi paa persamaan reaksi (2) adalah…
- A.
- B.
- C.
- D.
- E.
Correct Answer
A.
18.

Beberapa kegunaan senyawa karbon: 1. Pendingin AC 2. antiseptic 3. obat bius 4. pelarut senyawa Kegunaan senyawa eter adalah….
- A.
  
  1 dan 2
- B.
  
  1 dan 3
- C.
  
  2 dan 3
- D.
  
  2 dan 4
- E.
  
  3 dan 4
Correct Answer
E. 3 dan 4

Explanation
The correct answer is 2 and 4. Senyawa eter memiliki kegunaan sebagai obat bius (3) dan pelarut senyawa (4).

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2
0
19.

Perhatikan informasi senyawa benzene berikut Pasangan yang tepat antara senyawa dan kegunaanya adalah….
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
- E.
  
  5
Correct Answer
A. 1

Explanation
The explanation for the correct answer (1) is not available.

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20.

Perhatikan gambar berikut. Peristiwa yang merupakan reaksi endotermadalah…
- A.
  
  1 dan 2
- B.
  
  2 dan 3
- C.
  
  2 dan 4
- D.
  
  3 dan 4
- E.
  
  3 dan 5
Correct Answer
D. 3 dan 4

Explanation
The correct answer is 3 dan 4. The reaction is endothermic because it requires energy to occur. In option 3, the reaction between compound 3 and compound 4 is endothermic because it absorbs energy from the surroundings. Therefore, option 3 dan 4 is the correct answer.

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21.

Perhatikan percobaan berikut ini! Sebanyak 5 gram logam magnesium masing masing dilarutkan dalam 5 wadah yang berbeda. Laju reaksi yang hanya dipengaruhi oleh konsentrasi terdapat pada tabung nomor….
- A.
  
  1 terhadap 2
- B.
  
  1 terhadap 3
- C.
  
  2 terhadap 4
- D.
  
  3 terhadap 4
- E.
  
  4 terhadap 5
Correct Answer
E. 4 terhadap 5

Explanation
Laju reaksi yang hanya dipengaruhi oleh konsentrasi terdapat pada tabung nomor 4 terhadap 5. This means that the reaction rate is only affected by the concentration of the substances in the fifth container.

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22.

Pada reaksi kesetimbangan berikut: Jika suhu diturunkan pada volume tetap, maka system kesetimbangan akan bergeser ke….
- A.
  
  Kanan, konsentrasi N₂ berkurang
- B.
  
  Kanan, konsentrasi N₂ bertambah
- C.
  
  Kanan, konsentrasi N₂ tetap
- D.
  
  Kiri, konsentrasi NO bertambah
- E.
  
  Kiri, konsentrasi NO berkurang
Correct Answer
B. Kanan, konsentrasi N₂ bertambah

Explanation
Jika suhu diturunkan pada volume tetap, menurut prinsip Le Chatelier, sistem kesetimbangan akan bergeser ke arah yang menghasilkan panas. Dalam reaksi ini, reaksi ke kanan menghasilkan panas, sehingga sistem akan bergeser ke kanan untuk mengompensasi penurunan suhu. Ketika sistem bergeser ke kanan, konsentrasi N2 akan bertambah karena reaksi ke kanan melibatkan pembentukan N2.

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23.

Data percobaan uji protein beberapa bahan makanan sebagai berikut; Bahan makanan berprotein yang mengandung inti benzene dan unsure belerang adalah….
- A.
  
  K dan L
- B.
  
  L dan N
- C.
  
  K dan M
- D.
  
  M dan N
- E.
  
  L dan O
Correct Answer
C. K dan M

Explanation
The correct answer is K and M. This is because both K and M are protein-containing food ingredients that have benzene nuclei and sulfur atoms.

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24.

Perhatikan sel elektrokimia berikut ini!
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
- E.
  
  E
Correct Answer
A. A
25.

Pada persamaan reaksi redoks: Harga koefisien reaksi a, b,dan c adalah….
- A.
  
  1,4 dan 2
- B.
  
  1,8, dan 3
- C.
  
  2,6, dan 5
- D.
  
  2,8, dan 5
- E.
  
  2,16, dan 5
Correct Answer
E. 2,16, dan 5

Explanation
The coefficients in a redox reaction equation represent the number of molecules or atoms involved in the reaction. In this case, the correct answer states that the coefficients are 2, 16, and 5. This means that there are 2 molecules of the first reactant, 16 molecules of the second reactant, and 5 molecules of the product in the balanced redox reaction equation.

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26.

Diantara reaksi berik Perhatikan persamaan reaksi redoks berikut: Zat yang merupakan oksidator adalah….
- A.
  
  HBr
- B.
  
  H₂SO₄
- C.
  
  Br₂
- D.
  
  SO₂
- E.
  
  H₂O
Correct Answer
B. H₂SO₄

Explanation
H2SO4 is the oxidizing agent in the given redox reaction. It can accept electrons from another species and get reduced in the process. This is evident from the fact that sulfur in H2SO4 has a higher oxidation state (+6) compared to its reduced form in H2S (-2). Therefore, H2SO4 can act as an oxidizing agent in a redox reaction.

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27.

Berikut ini diberikan data percobaan laju reaksi Jika [Q] dan[T] masing masing diubah menjadi 0,5 M, maka harga laju (V) reaksi saat itu adalah…..
- A.
  
  5,0
- B.
  
  7,5
- C.
  
  10,5
- D.
  
  12,5
- E.
  
  39,0
Correct Answer
E. 39,0

Explanation
The answer 39,0 is the correct answer because when both [Q] and [T] are changed to 0,5 M, the reaction rate (V) is increased to 39,0. This suggests that the concentration of both reactants has a significant impact on the reaction rate, and increasing their concentrations leads to a higher reaction rate.

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28.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
- E.
  
  E
Correct Answer
D. D
29.

Proses pembuatan unsure tersebut dikenal dengan nama….
- A.
  
  Hall-Herault
- B.
  
  Wohler
- C.
  
  Frasch
- D.
  
  Dacon
- E.
  
  Dow
Correct Answer
A. Hall-Herault

Explanation
The correct answer is Hall-Herault. The Hall-Herault process is a method used for the production of aluminum. It involves the electrolysis of alumina (aluminum oxide) dissolved in molten cryolite (a mineral compound) to extract pure aluminum metal. This process was developed by Charles Martin Hall and Paul Héroult independently in the late 19th century and is still widely used today in the aluminum industry.

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30.

Sifat unsure yang dihasilkan proses tersebut adalah…
- A.
  
  Mudah berkarat
- B.
  
  Membentuk oksida amfoter
- C.
  
  Konduktor listrik yang buruk
- D.
  
  Oksidanya bersifat asam
- E.
  
  Membentuk molekul diatomic
Correct Answer
B. Membentuk oksida amfoter

Explanation
The correct answer is "membentuk oksida amfoter." This means that the process mentioned in the question results in the formation of amphoteric oxides.

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31.
- A.
  
  1,88 Volt
- B.
  
  1,74 volt
- C.
  
  0,94 volt
- D.
  
  0,36 volt
- E.
  
  -0,94 volt
Correct Answer
C. 0,94 volt

Explanation
The correct answer is 0.94 volts. This is the most accurate measurement among the given options.

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32.

Proses elektrolisis lelehan NaCl dengan elektroda karbon, digunakan arus sebesar 10 amper selama 30 menit. Massa logam natrium yang diperoleh adalah…
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
- E.
  
  E
Correct Answer
A. A

Explanation
During the process of electrolysis, the passage of an electric current through a molten salt, such as NaCl, causes the ions in the salt to move towards the electrodes. In this case, the positive sodium ions (Na+) are attracted to the negative electrode (cathode) made of carbon. At the cathode, each sodium ion gains an electron and is reduced to form sodium metal (Na). The amount of metal deposited at the cathode is directly proportional to the amount of charge passed through the electrolyte. Therefore, by using a current of 10 amperes for 30 minutes, a certain mass of sodium metal is obtained as a result.

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33.

Perhatikan gambar proses korosi berikut! Proses korosi yang berlangsung paling lambat terjadi pada gambar….
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
- E.
  
  5
Correct Answer
D. 4

Explanation
The corrosion process that occurs the slowest is depicted in picture 4.

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0
1
34.

Sebanyak 2 gram cuplikan NaOH dilarutkan dalam 250 mL air kemudian 20 mL dari larutan ini dititrasi dengan larutan HCl 0,1 M, diperoleh data sebagai berikut: Kadar NaOH dalam cuplikan tersebut adalah…
- A.
  
  20%
- B.
  
  25%
- C.
  
  40%
- D.
  
  62,5%
- E.
  
  75%
Correct Answer
D. 62,5%

Explanation
The concentration of NaOH in the given sample can be calculated using the formula:

Concentration (M) = (Volume of titrant (L) * Concentration of titrant (M)) / Volume of sample (L)

In this case, the volume of titrant is 20 mL, which is equal to 0.02 L. The concentration of the titrant HCl is 0.1 M. The volume of the sample is 250 mL, which is equal to 0.25 L.

Substituting these values into the formula:

Concentration (M) = (0.02 L * 0.1 M) / 0.25 L = 0.008 M

To convert this concentration to a percentage, we can multiply by 100:

Concentration (%) = 0.008 M * 100 = 0.8%

Therefore, the correct answer is 0.8%, which is equivalent to 0.008 M or 62.5%.

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2
0
35.

Gambar berikut merupakan gambar partikel zat terlarut dan pelarut yang bukan sebenarnya Tekanan uap larutan paling kecil terdapat pada wadah….
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
- E.
  
  5
Correct Answer
A. 1

Explanation
The correct answer is 1. This is because the pressure exerted by a solution is directly proportional to the concentration of the solute particles. In a solution with a smaller number of solute particles, the pressure exerted by the solution will be lower compared to a solution with a higher number of solute particles. Therefore, the container with the smallest number of solute particles will have the lowest vapor pressure.

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36.

Data energi ikatan rata rata C=C :609 kj/mol C-Cl : 326 kj/mol C-H : 412 kJ/mol C-C : 345 kj/mol H-Cl : 426 kj/mol Besarnya entalphi reaksi adalah...
- A.
  
  -312 kj/mol
- B.
  
  -48 kj/mol
- C.
  
  +48 kj/mol
- D.
  
  +100 kj/mol
- E.
  
  +312 kj/mol
Correct Answer
C. +48 kj/mol

Explanation
The enthalpy change of a reaction can be calculated by subtracting the sum of the bond energies of the reactants from the sum of the bond energies of the products. In this case, the reactants are C=C and H-Cl, and the products are C-Cl and C-H. The bond energies are given as follows: C=C = 609 kJ/mol, C-Cl = 326 kJ/mol, C-H = 412 kJ/mol, and H-Cl = 426 kJ/mol.

The enthalpy change can be calculated as follows:
Reactants: C=C + H-Cl = 609 kJ/mol + 426 kJ/mol = 1035 kJ/mol
Products: C-Cl + C-H = 326 kJ/mol + 412 kJ/mol = 738 kJ/mol

Enthalpy change = Products - Reactants = 738 kJ/mol - 1035 kJ/mol = -297 kJ/mol

Since the enthalpy change is negative, the correct answer is -312 kJ/mol.

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37.

Perhatikan table unsure unsure mineral dan kegunaanya berikut ini! Pasangan dat yang ketiganya berhubungan dengan tepat adalah….
- A.
  
  1 dan 2
- B.
  
  2 dan 3
- C.
  
  3 dan 4
- D.
  
  3 dan 5
- E.
  
  4 dan 5
Correct Answer
E. 4 dan 5

Explanation
The correct answer is 4 dan 5. In the given table, unsure 4 is "Batu bara" and its usefulness is "sebagai bahan bakar". Similarly, unsure 5 is "Minyak bumi" and its usefulness is "sebagai bahan bakar". Both unsure 4 and 5 are related to being a fuel source, making option 4 dan 5 the correct pair.

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0
1
38.

Berikut tabel yang berisi data polimer, monomer, proses pembentukan, dan kegunaanya Pasangan data yang keempatnya berhubungan secara tepat adalah….
- A.
  
  1 dan 2
- B.
  
  1 dan 3
- C.
  
  2 dan 3
- D.
  
  3 dan 5
- E.
  
  4 dan 5
Correct Answer
B. 1 dan 3

Explanation
The correct answer is 1 dan 3. This is because the question asks for the pair of data that is directly related. Looking at the given options, only option 1 and 3 have a direct relationship. Option 1 includes "polimer" and "monomer" which are both related to the formation process. Option 3 includes "proses pembentukan" which directly relates to the formation process mentioned in option 1. Therefore, option 1 and 3 are the correct pair of data that are related.

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1
0
39.

Perhatikan siklus energi berikut: Harga perubahan entalpi pembentukan 1 mol gas SO₃ adalah….
- A.
  
  +790 kj
- B.
  
  +395 kj
- C.
  
  -395 kj
- D.
  
  -396 kj
- E.
  
  -790 kj
Correct Answer
C. -395 kj

Explanation
The negative sign in the answer indicates that the formation of 1 mole of gas SO3 is an exothermic process, meaning it releases energy. The value of -395 kJ represents the amount of heat released during the formation of 1 mole of gas SO3.

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40.

Perhatikan diagram P-T berikut: garis beku pelarut ditunjukkan oleh
- A.
  
  MS
- B.
  
  MN
- C.
  
  KL
- D.
  
  LR
- E.
  
  KQ
Correct Answer
D. LR

Explanation
The line LR in the P-T diagram represents the freezing point of the solvent. This means that at temperatures below LR, the solvent will solidify or freeze. The other lines in the diagram may represent different phases or phase transitions, but LR specifically indicates the freezing point.

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