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Asseration (A) : Increasing order of aci...

Asseration (A) : Increasing order of acidity of hydrogen halides is `HFltHCIltHBrltHI`
Reason (R): While comparing acids formed by the elements belonging to the same group of periodic table, H-A bond strength is a more important factor in determining acidity of an acid than the polar nature of the bond.

A

Both A and B are true and R is the correct explanation of A.

B

Both A and R are ture but R is not the correct explanation of A.

C

A is the ture R is false.

D

Both A and R are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Reason is the correct explanation for assertion
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Knowledge Check

  • Assertion (A) : Increasing order of acidity of hydrogen halides is HF lt HCl lt HBr lt HI . Reason (R) : While comparing acids formed by the elements belonging to the same group of periodic table, H-A bond strength is a more important factor in determining acidity of an acid than the polar nature of the bond.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and R are true but R is not the correct explanation of A.
    C
    A is true but R is false.
    D
    Both A and R are false.

  • The increasing order of acid strength of hydrogen halide in water is

    A
    HFgt HCl gt HBr gt HI
    B
    HCl gtHFgt HBr gt HI
    C
    HlgtHBrgtHClgtHF
    D
    HClgtHBrgtHFgtHI

  • The correct increasing order of acidic strength of oxyacids of group 15 elements is

    A
    `H_(3)SbO_(4)ltH_(3)PO_(4)ltH_(3)AsO_(4)ltHNO_(3)`
    B
    `H_(3)SbO_(4)ltH_(3)AsO_(4)ltH_(3)PO_(4)ltHNO_(3)`
    C
    `HNO_(3)ltH_(3)SbO_(4)ltH_(3)AsO_(4)ltH_(3)PO_(4)`
    D
    `H_(3)PO_(4)ltH_(3)AsO_(4)ltH_(3)SbO_(4)ltHNO_(3)`

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    Statement 1: Acid strength increases in the order given as HFltltHClltltHBrltltHI . Statement 2: As the size of the elements F,Cl,Br,I increases down the group, the bond strength of HF,HCl,HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below:

    Assertion (A) : Among the hydrogen halides HF is weakest acid. Reason R: Among hydrogen halides HF bond length is least.

    Assertion (A) : The acidic strength of halogen acids varies in the order HF> HCl> HBr> HI Reason (R ) : The bond dissociation enthalpy of halogen acids decreases in the order : HF> HCl> HBr> HI

    Assertion: The acidic strength of halogen acids varies in the order HFgtHClgtHBrgtHI Reason: The bond dissociation enthalpy of halogen acids decreases in the HFgtHClgtHBrgtHI

    Three elements, X, Y and Z belong to the same period. Their oxides are acidic, amphoteric and basic respectively. The order of electronegative of these elements in the periodic table is

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