4.2.2 Chemical Properties

• Which halogen is the strongest oxidizing agent in Group 7?

  Fluorine
• The oxidizing strength of halogens increases down Group 7.

  False
• The weakest oxidizing agent in Group 7 is astatine
• What type of compounds are formed when halogens react with metals?

  Ionic compounds
• Fluorine reacts more vigorously with metals than iodine does.
• Arrange the halogens in order of decreasing reactivity with hydrogen:

  1️⃣ Fluorine

  2️⃣ Chlorine

  3️⃣ Bromine

  4️⃣ Iodine
• What is the general formula for the reaction between a halogen and hydrogen?

  H_{2} + X_{2} \rightarrow 2HX</latex>
• The reaction between fluorine and hydrogen is explosive, even at low temperatures
• The reaction between iodine and hydrogen is reversible and requires heating.
• What compound is formed when carbon reacts with fluorine?

  $CF_{4}$
• What type of bond is formed when halogens react with non-metals?

  Covalent bond
• The reactivity order of halogens with hydrogen is: Fluorine > Chlorine > Bromine > Iodine
• Arrange the halogens in order of decreasing reactivity with hydrogen:

  1️⃣ Fluorine

  2️⃣ Chlorine

  3️⃣ Bromine

  4️⃣ Iodine
• The reaction between carbon and halogens requires high temperatures or catalysts.
• What are the products formed when halogens react with hydrogen?

  Hydrogen halides
• What is the reactivity order of halogens with hydrogen?

  F > Cl > Br > I
• Fluorine reacts with hydrogen explosively, even at low temperatures
• Chlorine reacts with hydrogen vigorously and requires UV light or heat.
• What conditions are required for bromine to react with hydrogen?

  Moderate heating
• Iodine reacts with hydrogen slowly and the reaction is reversible
• What type of organic compounds do halogens form with carbon?

  Halogenated organic compounds
• Reactions of halogens with carbon require high temperatures or catalysts.
• What are the key points of halogen reactions summarized in the material?

  Covalent compounds, electronegativity, reactivity trend
• Halogens react with water to form hypohalous acids and hydrogen halides
• What is the general equation for the reaction of halogens with water?

  X_{2} + H_{2}O \rightarrow HOX + HX</latex>
• Match the halogen with its reaction with water:

  Fluorine ↔️ Extremely vigorous

  Chlorine ↔️ Moderate

  Bromine ↔️ Slow

  Iodine ↔️ Negligible
• The reactivity of halogens with water decreases down Group 7 due to decreasing electronegativity and electron affinity.
• What is the reactivity order of halogens in displacement reactions?

  F > Cl > Br > I > At
• Fluorine can displace chlorine in $2NaF$ to form2NaCl</latex> and F_{2}
• Which halogen has the highest oxidising strength?

  Fluorine
• The oxidising strength of halogens decreases down Group 7 due to decreasing electronegativity and electron affinity.
• Halogens react with metals to form ionic compounds called salts
• What is the product of the reaction between sodium and chlorine?

  NaCl</latex>
• Arrange the halogens in order of their reactivity with metals:

  1️⃣ Fluorine

  2️⃣ Chlorine

  3️⃣ Bromine

  4️⃣ Iodine
• Halogens form covalent compounds with non-metals due to their high electronegativity.
• Match the halogen with its reaction with hydrogen:

  Fluorine ↔️ Explosive

  Chlorine ↔️ Vigorous

  Bromine ↔️ Moderate

  Iodine ↔️ Slow
• The general equation for the reaction of halogens with carbon is $C +$$2X_{2} \rightarrow CX_{4}$, where X represents a halogen
• What conditions are required for the reaction of chlorine with carbon to form $CCl_{4}$?


  Heat or catalysts
• What compounds do halogens form when reacted with hydrogen?

  Hydrogen halides
• Halogens react with hydrogen to form hydrogen halides.