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Most of the reactions of fluorine are ex...

Most of the reactions of fluorine are exothermic. Give reasons.

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### Step-by-Step Solution: 1. **Understanding Exothermic Reactions**: - Exothermic reactions are those that release energy, usually in the form of heat, during the reaction process. 2. **Electronegativity of Fluorine**: - Fluorine is the most electronegative element in the periodic table, with an electronegativity value of 4.0 on the Pauling scale. This high electronegativity means that fluorine has a strong tendency to attract electrons towards itself. ...
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Statement-1 : Most of the reactions of fluorine are exothermic. Statement-2: Fluorine atom is smaller in size and forms strong bonds with other elements and has low dissociation energy of the F-F bond.

What do you understand by exothermic and endothermic reactions ? Describe an exothermic reaction.

For an exothermic reaction

Which one of the reaction is an exothermic reaction

In exothermic reaction

(a) What do you understned by exothermic and endothermic reactions ? (b) Give one example of an exothermic reaction and one of an endothermic reaction. (c ) Which of the following are endothermic reactions and which are exothermic reactions ? {:((i),"Burning of natural gas",(ii),"Photosynthesis"),((iii),"Electrolysis of water",(iv),"Respiration"),((v),"Decomposition of calcium carbonate",,):}

Knowledge Check

  • Statement-1 : Most of the reactions of fluorine are exothermic. Statement-2: Fluorine atom is smaller in size and forms strong bonds with other elements and has low dissociation energy of the F-F bond.

    A
    Statement-1 is True, Statement-2 is True,Statement-2 is a correct explanation for Statement-1.
    B
    Statement-1 is True, Statement-2 is True,Statement-2 is NOT a correct explalanation for Statement-3
    C
    Statement-1 is True, Statement-2 is False
    D
    Statement-1 is False, Statement-2 is True

  • For an exothermic reaction

    A
    `H_p` of the products is less than `H_r` of the reactants
    B
    `H_p` of the products is more than `H_r` of the reactants
    C
    `H_p` of the products is equal to `H_r` of the reactants
    D
    `triangleH` is always positive

  • For an exothermic reaction

    A
    H of the products is less than H of the reactants
    B
    H of the products is more than H of the reactants
    C
    H of the products is equal to H of the reactants
    D
    `DeltaH` is always positive
    • PRADEEP-P-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS
    1. Name the halogen with lowest ionization energy.

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    2. Fluorine is the most reactive of all four common halogens.

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    3. Most of the reactions of fluorine are exothermic. Give reasons.

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    4. Give one chemical method for the preparation of flourine.

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    5. Write the balanced equation for the following reaction. NaCl is heat...

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    6. Write the chemical equation to show that chlorine gas can be obtained ...

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    7. Write a balanced equation for the reaction of Cl(2) with cold and dilu...

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    8. What happens when chlorine gas is passed through a hot concentrated so...

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    9. What happens when iodine reacts with sodium thiosulphate.

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    10. (a) Name the halogen hydracid with highest bond energy. (b) When HI ...

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    11. KHF(2) is known but KHCl(2) is not known. Give reasons.

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    12. HI cannot be prepared by the action of conc. H(2)SO(4) on KI because

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    13. Arrange the following acids in the correct increasing order of their a...

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    14. Which of the hydracids of halogens reacts with glass ?

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    15. Give an example of a disproportionation reaction of F(2) ?

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    16. Name the halogen which forms only one oxo acid and also write the form...

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    17. Which one among the following is the strongest oxidizing agent ? ClO(...

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    18. With what neutral molecule is CIO^(ө) isoelectronic?

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    19. Which neutral molecule would be isoelectronic with CIO^(-) ?

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    20. Iodine forms I(3)^(-) but F(2) does not form F(3)^(-) ions. Why ?

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