Tes Kimia Kelas X Semester 2

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Tes Kimia Kelas X Semester 2 - Quiz

Pilihlah jawaban dengan klik a, b, c, d atau e yang kamu anggap benar


Questions and Answers
  • 1. 

    Elektrolit adalah ......

    • A.

      Zat yang menghantarkan arus listrik

    • B.

      Garam yang terionisasi menjadi kation dan anion

    • C.

      Larutan yang memerahkan kertas lakmus biru

    • D.

      Larutan yang membirukan kertas lakmus merah

    • E.

      Zat yang dalam larutannya dapat menghantarkan panas

    Correct Answer
    A. Zat yang menghantarkan arus listrik
    Explanation
    Electrolytes are substances that can conduct electricity. When dissolved in water or melted, they break down into ions, which are charged particles. These ions are then able to move freely and carry an electric current. This ability to conduct electricity is what defines electrolytes.

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  • 2. 

    Larutan natrium klorida dan larutan asam sulfat keduanya bisa menghantarkan listrik. Hal ini menunjukkan bahwa larutan tersebut adalah ......

    • A.

      Bersifat basa

    • B.

      Bersifat netral

    • C.

      Mengandung ion

    • D.

      Saling bereaksi

    • E.

      Bersifat asam

    Correct Answer
    C. Mengandung ion
    Explanation
    The correct answer is "mengandung ion". Both sodium chloride solution and sulfuric acid solution can conduct electricity, indicating that they contain ions.

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  • 3. 

    Diantara larutan di bawah ini, yang dapat menghantarkan arus listrik adalah larutan .....

    • A.

      Gula pasir

    • B.

      Alkohol

    • C.

      Urea

    • D.

      Amilum

    • E.

      Garam dapur

    Correct Answer
    E. Garam dapur
    Explanation
    Garam dapur dapat menghantarkan arus listrik karena garam dapur terdiri dari ion-ion positif (Na+) dan ion-ion negatif (Cl-) yang dapat bergerak bebas dalam larutan. Ketika diberikan potensial listrik, ion-ion dalam larutan garam dapur akan bergerak menuju elektroda dengan muatan yang berlawanan, sehingga arus listrik dapat mengalir melalui larutan garam dapur.

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  • 4. 

    Air jeruk bila diuji elektrolitnya ternyata tidak memberikan nyala lampu tetapi di elektroda timbul gelembung gas. Kesimpulannya adalah ......

    • A.

      Air jeruk merupakan larutan non elektrolit

    • B.

      Air jeruk merupakan larutan elektrolit kuat

    • C.

      Air jeruk merupakan larutan elektrolit lemah

    • D.

      Air jeruk tidak mengandung ion-ion

    • E.

      Alat penguji elektrolitnya rusak

    Correct Answer
    C. Air jeruk merupakan larutan elektrolit lemah
    Explanation
    The correct answer is "air jeruk merupakan larutan elektrolit lemah". This is because even though air jeruk does not produce a glowing light when tested as an electrolyte, the fact that gas bubbles form at the electrode indicates that it does conduct electricity to some extent. However, the conductivity is weak, suggesting that the solution contains a small amount of ions.

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  • 5. 

    Larutan yang merupakan elektrolit adalah ........

    • A.

      I, II dan III

    • B.

      I, II dan IV

    • C.

      I, III dan V

    • D.

      II, III dan V

    • E.

      II, IV dan V

    Correct Answer
    D. II, III dan V
    Explanation
    The correct answer is II, III, and V. This is because an electrolyte is a substance that conducts electricity when dissolved in water or melted. In this case, options II, III, and V are the only ones that consist of substances that can conduct electricity when dissolved in water. Option I does not have any substances that are known to be electrolytes, and option IV does not have any substances that are soluble in water.

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  • 6. 

    Kemampuan menghantarkan arus listrik dalam larutan dapat dilihat dari harga derajat ionisasi. Di bawah ini yang mempunyai harga derajat ionisasi terbesar adalah .....

    • A.

      Larutan CO(NH2)2 0,1 M

    • B.

      Larutan C6H12O6 0,1M

    • C.

      Larutan H2SO4 0,1 M

    • D.

      Larutan CH3COOH 0,1 M

    • E.

      Larutan alkohol 0,1 M

    Correct Answer
    C. Larutan H2SO4 0,1 M
    Explanation
    The correct answer is "larutan H2SO4 0,1 M" because H2SO4 is a strong acid, which means it ionizes completely in water and produces a high concentration of ions. This high degree of ionization allows for better conductivity of electric current in the solution compared to the other substances listed, which may only partially ionize or not ionize at all.

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  • 7. 

    Jumlah atom C sekunder pada senyawa di bawah ini adalah .....

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    • E.

      5

    Correct Answer
    C. 3
    Explanation
    The correct answer is 3 because a secondary carbon (C) atom is a carbon atom that is bonded to two other carbon atoms. In the compound given, there are three carbon atoms that are bonded to two other carbon atoms, making them secondary carbon atoms.

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  • 8. 

    Perhatikan pernyataan berikut ini ! 1)     pengikatan oksigen 2)     penangkapan elektron 3)     pertambahan bilangan oksidasi 4)     pengurangan oksigen 5)     penurunan bilangan oksidasi Pernyataan di atas yang merupakan ciri-ciri reaksi oksidasi adalah pernyataan nomor .....

    • A.

      1, 2 dan 3

    • B.

      1 dan 3

    • C.

      2, 3 dan 4

    • D.

      4 dan 5

    • E.

      1 dan 5

    Correct Answer
    B. 1 dan 3
    Explanation
    The correct answer is 1 and 3. This is because both "pengikatan oksigen" (oxygen binding) and "pertambahan bilangan oksidasi" (increase in oxidation number) are characteristics of oxidation reactions. "Penangkapan elektron" (electron capture) is not necessarily a characteristic of oxidation, as it can also occur in reduction reactions. Similarly, "pengurangan oksigen" (reduction of oxygen) and "penurunan bilangan oksidasi" (decrease in oxidation number) are characteristics of reduction reactions, not oxidation reactions.

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  • 9. 

    Berikut ini merupakan reaksi reduksi, kecuali ......

    • A.

      CrO42- --> Cr3+

    • B.

      IO3- --> I2

    • C.

      CrO42- --> Cr2O3

    • D.

      CrO4- --> Cr2O72-

    • E.

      MnO42- --> MnO4-

    Correct Answer
    E. MnO42- --> MnO4-
    Explanation
    The given answer states that the reaction MnO42- --> MnO4- is not a reduction reaction. This is because in a reduction reaction, the oxidation state of an element decreases. In this reaction, the oxidation state of manganese (Mn) is changing from +7 to +6, which means it is being oxidized rather than reduced. Therefore, this reaction is not a reduction reaction.

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  • 10. 

    Senyawa nitrogen berikut yang mempunyai bilangan oksidasi -2 adalah .....

    • A.

      N2H4

    • B.

      NH3

    • C.

      NH4OH

    • D.

      NH4+

    • E.

      NaNO3

    Correct Answer
    A. N2H4
    Explanation
    Nitrogen dioksida (N2H4) memiliki bilangan oksidasi -2 karena nitrogen memiliki bilangan oksidasi -2 dan tidak ada atom lain yang mempengaruhinya. Dalam senyawa ini, nitrogen berbagi empat pasang elektron dengan atom hidrogen, sehingga setiap atom hidrogen memberikan satu elektron kepada nitrogen, menghasilkan bilangan oksidasi -2.

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  • 11. 

    Penurunan bilangan oksidasi terdapat pada reaksi......

    • A.

      Fe(OH)3 --> Fe2O3

    • B.

      H2S --> SO2

    • C.

      SO3 --> SO42-

    • D.

      NO2 --> NO3-

    • E.

      CrO42- --> Cr3+

    Correct Answer
    A. Fe(OH)3 --> Fe2O3
    Explanation
    The given reaction Fe(OH)3 --> Fe2O3 involves a decrease in the oxidation state of iron. In Fe(OH)3, the oxidation state of iron is +3, whereas in Fe2O3, the oxidation state of iron is +3 as well. Since the oxidation state remains the same, there is no change in the oxidation state. Therefore, the correct answer is Fe(OH)3 --> Fe2O3.

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