Chemistry F5 Bab 1

1. Apakah maksud pengoksidaan?

What is the meaning of oxidation?

A Proses kehilangan oksigen The process of losing oxygen

B Proses kehilangan elektron The process of losing electroNS

C Proses perkongsian elektron The process of sharing electrons

D Proses penambahan hidrogen The process of gaining hydrogen

• A. Proses kehilangan oksigen

  The process of losing oxygen

• B. Proses kehilangan elektron

  The process of losing electrons

• C. Proses perkongsian elektron

  The process of sharing electrons

• D. Proses penambahan hidrogen

  The process of gaining hydrogen

2. Rajah 1 menunjukkan tindak balas antara pita magnesium dengan larutan argentum nitrat.

Diagram 1 shows the reaction between a magnesium ribbon and silver nitrate solution.

Antara pernyataan berikut, yang manakah adalah betul?

Which of the following statements is correct?

• A. Pepejal kelabu terbentuk.

  A grey solid is formed.

• B. Pita magnesium menjadi lebih tebal.

  The magnesium ribbon becomes thicker.

• C. Larutan argentum nitrat dioksidakan.

  Silver nitrate solution is oxidised.

• D. Larutan biru terhasil.

  A blue solution is produced

3. Antara yang berikut, yang manakah merupakan agen pengoksidaan?

Which of the following is an oxidising agent?

• A. Serbuk zink

  Zinc powder

• B. Air iodin

  lodine water

• C. Larutan kalium bromida

  Potassium bromide solution

• D. Hidrogen peroksida

  Hydrogen peroxide

4. Antara yang berikut, yang manakah merupakan tindak balas redoks?

Which of the following is a redox reaction?

• A. Tindak balas litium dengan air

  Reaction of lithium and water

• B. Peneutralan asid hidroklorik oleh larutan natrium hidroksida

  Neutralisation of hydrochloric acid by sodium hydroxide solution

• C. Penguraian kalsium karbonat

  Decomposition of calcium carbonate

• D. Pemendakan barium sulfat daripada larutan barium nitrat

  Precipitation of barium sulphate from barium nitrate solution

5. Antara persamaan kimia berikut, yang manakah melibatkan tindak balas redoks?

Which of the following chemical equations involves a redox reaction?

• A. C(p/s) + O2(g) → CO2(g)

• B. CaCO3(p/s) → CaO(p/s) + CO2(g)

• C. 2NaOH(ak/aq) + H2SO4(ak/aq) → Na2SO4(ak/aq) + H2O(ce/l)

• D. AgNO3(ak/aq) + NaCl(ak/aq) → AgCl(p/s) + NaNO3(ak/aq)

6. Berapakah nombor pengoksidaan bagi sulfur dalam H2S?

What is the oxidation number of sulphur in H₂S?

• A. -1

• B. -2

• C. +1

• D. +2

7. Apabila bahan X direndam dalam asid nitrik cair, suatu gas terbebas. Dalam tindak balas ini, apakah bahan X?

When substance X is immersed in dilute nitric acid, a gas is released. In this reaction, what is substance X?

• A. Alkali

  Alkali

• B. Garam

  Salt

• C. Agen penurunan

  Reducing agent

• D. Agen pengoksidaan

  Oxidising agent

8. Berikut merupakan satu notasi sel.

The following is a cell notation.

Pt|H2(g)|H+(ak/aq) || Cu²+(ak/aq)|Cu(p/s)

Antara pernyataan berikut, yang manakah adalah betul?

Which of the following statements is correct?

• A, Tindak balas yang berlaku ialah penurunan.

  The reaction that occurs is reduction.

• B. Elektrod kuprum adalah katod.

  The copper electrode is the cathode.

• C. Nombor pengoksidaan hidrogen ialah +1 kepada 0.

  The oxidation number of hydrogen is +1 to 0.

• D. Elektrod kuprum mengalami pengoksidaan.

  The copper electrode undergoes oxidation.

9. Berapakah suhu bagi keadaan piawai untuk elektrod hidrogen piawai?

What is the temperature of standard conditions for the standard hydrogen electrode?

• A. 200 K

• B. 330 K

• C. 25°C

• D. 37°C

10. Apabila elektrod zink disambung pada elektrod hidrogen piawai, nilai keupayaan elektrod piawai, E ialah -0.76 V. Antara pernyataan berikut, yang manakah adalah betul?

When a zinc electrode is connected to a standard hydrogen electrode, the standard electrode potential value, E is -0.76 V. Which of the following statements is correct?

• A. Zink adalah agen penurunan.

  Zinc is a reducing agent.

• B. Zink adalah terminal positif.

  Zinc is a positive terminal.

• C. Zink mengalami penurunan.

  Zinc undergoes reduction.

• D. Platinum adalah terminal negatif.

  Platinum is a negative terminal.