SCIENCE FORM 5 CHAP 6

Which of the following statements is correct about the meaning of electrochemistry?

Antara pernyataan berikut,yang manakah betul tentang maksud elektrokimia?

• electrochemistry uses electrical energy to make chemical substances

  elektrokimia menggunakan tenaga elektrik untuk membuat bahan kimia

• electrochemistry is the study about the relationship between electrical and chemical phenomena

  elektrokimia merupakan kajian tentang hubung kait antara fenomena elektrik dengan kimia

• electrochemistry is the use of electricity in the field of chemistry

  elektrokimia ialah penggunaan elektrik dalam bidang kimia

• electrochemistry is the use of chemical substances in the study of electricity

  elektrokimia ialah penggunaan bahan kimia dalam kajian elektrik

Which of the following phenomena occurs in an electrolytic cell?

Antara fenomena berikut,yang manakah berlaku dalam sel elektrolitik?

• electrical energy is converted into chemical energy

  tenaga elektrik ditukar menjadi tenaga kimia

• chemical energy is converted into electrical energy

  tenaga kimia ditukar menjadi tenaga elektrik

• chemical energy becomes a product of reaction

  tenaga kimia menjadi hasil tindak balas

• chemical energy is a reactant

  tenaga kimia ialah bahan tindak balas

Which of the following parts of an electrolytic cell is connected to the negative terminal of an electric power source?

Antara bahagian sel elektrolitik berikut,yang manakah disambungkan kepada terminal negatif sumber bekalan elektrik?

• anion

  anion

• cation

  kation

• anode

  anod

• cathode

  katod

Which of the following molten substances can be used as electrolyte in an electrolytic cell?

Leburan yang manakah dapat digunakan sebagai elektrolit dalam sel elektrolitik?

• molten naphthalene

  leburan naftalena

• molten acetamide

  leburan asetamida

• molten wax

  leburan lilin

• molten common salt

  leburan garam biasa

Which of the following factors does not affect the choice of type of ion to be discharged at the electrode for electrolysis of aqueous solution?

Faktor yang manakah tidak mempengaruhi pemilihan jenis ion untuk dinyahcas di elektrod bagi elektrolisis larutan akueus?

• mass of electrode

  jisim elektrod

• position of ion in electrochemical series

  kedudukan ion dalam siri elektrokimia

• concentration of electrolyte

  kepekatan elektrolit

• type of electrode

  jenis elektrod

Which statement is correct about the reaction in the chemical cell?

Pernyataan yang manakah betul tentang tindak balas dalam sel kimia ini?

• zinc ion is produced

  ion zink dihasilkan

• sodium ion is discharged

  ion natrium dinyahcas

• copper ion is produced

  ion kuprum dihasilkan

• copper sheet gets thicker

  kepingan kuprum semakin tebal

Which of the following occurs if the electrolytic cell runs for 2 hours?

Antara berikut,yang manakah berlaku jika sel elektrolitik itu dipasang selama 2 jam?

• electrode P gets thinner

  elektrod P semakin nipis

• electrode P gets thicker

  elektrod P semakin tebal

• electrode Q gets thinner

  elektrod Q semakin nipis

• no change in thickness of electrodes P and Q

  ketebalan elektrod P dan Q tidak berubah