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(A) Pka value of HF is positive (R ) H...

(A) Pka value of HF is positive
(R ) HF is strongest acid among HX

A

Both (A) and (R ) are true and (R ) is the correct explanation of (A)

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A) is true but (R ) is false

D

Both (A) and (R ) are false

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-VII GROUP ELEMENTS-OBJECTIVE EXERCISE -4
  1. (A) Iodine does not react with water (R ) Reaction of iodine with wa...

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  2. (A) Fluorine exhibits only -l oxidation state (R ) Fluorine is calle...

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  3. (A) Among HX , HF is liquid while others are gases (R ) HF has stro...

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  4. (A) In HX , stability decreases down the group (R ) Bond dissociatio...

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  5. (A) Iodine oxides are more stable than chlorine and bromine oxides (...

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  6. (A) I(2)O(5) is used for the estimation of carbon monoxide in qualitat...

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  7. (A) SnCl(4) is more covalent than SnCl(2) (R ) Compound with higher...

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  8. (A) Sea is the greatest source of some halogens (R ) Halogens are h...

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  9. (A) Aqueous solution of chlorine is a bleaching agent (R ) In presen...

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  10. (A) Reaction of Cl(2) with hot and concen -trated NaOH is disproportio...

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  11. (A) The noble metals like gold ,platinum dissolved in aqua regia (R ...

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  12. (A) With HCl ,Fe forms FeCl(2)andH(2) (R ) Formed H(2) prevents the ...

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  13. (A) Fluorine forms only one oxyacid HOF (R ) Fluorine has small size...

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  14. (A) Acidic nature increases from HOCl to HClO(4) (R ) Oxidation num...

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  15. (A) Hydrolysis of BrF(3) gives HF and HBrO(2) (R ) In the hydrolysis...

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  16. (A) IF(7) is the highest numbered inter halogen compound (R ) Radius...

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  17. (A) HCl most volatile hydrogen halide (R ) HCl has lowest boiling po...

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  18. (A) Aqueous chlorine turns blue litmus to red (R ) Aquous chlorine i...

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  19. (A) Pka value of HF is positive (R ) HF is strongest acid among HX

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  20. (A) IC l more reactive than F(2) (R ) I-Cl bond is weaker than F-F ...

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