Redox reaction

Which of the following CANNOT occur during oxidation?

Antara berikut yang manakah TIDAK berlaku semasa proses pengoksidaan?

• Gain of oxygen

  Menerima oksigen

• Donation of electron

  Menderma elektron

• Loss of hydrogen

  Kehilangan hidrogen

• Decrease in oxidation number

  Pengurangan nombor pengoksidaan

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the meaning of reduction?

Apakah maksud penurunan?

• Gain of electron

  Terima elektron

• Gain of oxygen

  Terima oksigen

• Loss of hydrogen

  Hilang hidrogen

• Increase in oxidation number

  Penambahan nombor pengoksidaan

Tags

NGSS.HS-PS1-2

Which of the following is a reduction reaction?

Antara yang berikut, yang manakah tindak balas penurunan?

• Carbon gain oxygen

  Karbon menerima oksigen

• Zinc atom loses electron

  Atom zink kehilangan elektron

• Hydrogen sulfide loses hydrogen

  Hidrogen sulfida kehilangan hidrogen

• Bromine molecule gains electron

  Molekul bromin menerima elektron

Tags

NGSS.HS-PS1-2

Which of the following is an oxidation process?

Antara yang berikut, yang manakah proses pengoksidaan?

• Carbon dioxide loses oxygen

  Karbon dioksida kehilangan oksigen

• A bromine atom gains an electron

  Satu atom bromin menerima satu elektron

• A chlorine molecules gains hydrogen

  Satu molekul klorin menerima hidrogen

• A sodium atom loses an electron

  Satu atom natrium kehilangan satu elektron

Tags

NGSS.HS-PS1-2

The following ionic equation represents a redox reaction

Persamaan ion berikut mewakili satu tindak balas redoks

Al + 3Ag⁺ -----> Al³⁺ + 3Ag

Which statement is correct?

Pernyataan manakah yang betul?

• Silver ion is oxidized

  Ion argentum dioksidakan

• Silver ion is a reducing agent

  Ion argentum adalah satu agen penurunan

• Aluminium atom undergoes oxidation

  Atom aluminium mengalami pengoksidaan

• Aluminium atom receives electrons

  Atom aluminium menerima elektron

Tags

NGSS.HS-PS1-2

Which statement defines oxidation?

Pernyataan manakah yang mendefinisikan pengoksidaan?

• Increase in oxidation number

  Penambahan nombor pengoksidaan

• Gain of hydrogen

  Terima hidrogen

• Loss of oxygen

  Hilang oksigen

• Gain of electron

  Terima elektron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which half equations show that the reactant acts as a reducing agent?

Persamaan setengah manakah yang menunjukkan bahan tindak balas sebagai agen penurunan?

I Mg ----> Mg²⁺ + 2e

II Cu²⁺ + 2e ------> Cu

III 2Cl^- -----> Cl_² + 2e

IV 2H⁺ + 2e -----> H2

• I and II

• I and III

• II and IV

• III and IV

Tags

NGSS.HS-PS1-2

Mg + CuO ------->MgO + Cu

Bahan manakah adalah agen pengoksidaan?

Which substance is oxidising agent?

• Mg

• CuO

• MgO

• Cu

Tags

NGSS.HS-PS1-2

Reduction occur when ....

Penurunan berlaku apabila....

• Hydrogen chloride lose hydrogen

  Hidrogen klorida kehilangan hidrogen

• Copper(II) oxide lose oxygen

  Kuprum(II) oksida kehilangan oksigen

• Magnesium atom release electron

  Atom magnesium kehilangan elektron

• Zinc atom change to zinc ion

  Atom zink berubah menjadi ion zink

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is oxidation number of O₂ molecule

Apakah nombor pengoksidaan bagi molekul O₂

• -2

• 0

• +1

• +2

Tags

NGSS.HS-PS1-1