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Assertion : Xenon fluorides are well kno...

Assertion : Xenon fluorides are well known and stable but the corresponding chlorides have not been reported.
Reason : Xe-F bond is more strong than Xe-Cl bond and `F_2` molecule has low bond dissociation energy than that of `Cl_2` molecule.

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

B

If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

C

If Assertion is correct , but Reason is incorrect

D

If both Assertion and Reason are incorrect

Text Solution

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The correct Answer is:
A
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Statement 1 : Xenon fluorides are well known and stable but the corresponding chlorides have not been reported. Statement 2: Xe-F bond is more strong than Xe-Cl bond and F_2 molecule has low bond dissociation energy than that of Cl_2 molecule.

Assertion : Dipole moment of CH_(3)F is greater than CH_(3)Cl Reason : C-Cl bond is more polar than C-F bond.

Assertion : Salts of ClO_3^- and ClO_4^- are well known but those of FO_3^- and FO_4^- are non-existent. Reason : F is more electronegative than O while Cl is less electronegative than O.

Assertion: Molecular nitrogen is less reactive than molecular oxygen Reason The bond length of N_2 is shorter than that of O_2

Assertion: H _(2) molecule is more stable than He-H molecule. Reason: The antibonding electron in He-H molecule decreases the bond order and thereby stability

In the following question, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer. Assertion : Fluorine molecule has bond order one. Reason : The number of electrons in the antibonding molecular orbitals is two less than that in bonding molecular orbitals.

BRILLIANT PUBLICATION-P-BLOCK ELEMENTS-LEVEL II (ASSERTION AND REASON)
  1. Assertion : Salts of ClO3^- and ClO4^- are well known but those of FO3...

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  2. Assertion : Xenon fluorides are well known and stable but the correspo...

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  3. Assertion Although PF5,PCl5 and PBr5 are known, the pentahalides of ni...

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  4. Assertion : F atom has a less negative election gain enthalpy than Cl ...

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  5. Assertion : White phosphorus is more reactive than red phosphorus. ...

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  6. Assertion: SF6 can't be hydrolysed but SF4 can be. Reason: Six fluor...

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  7. Assertion : In vapour state sulphur is paramagnetic in nature. Reas...

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  8. Assertion : Fluorine combines with sulphurto form SF6 but no other hal...

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  9. Assertion : Fluorine oxidises water to oxygen whereas chlorine and bro...

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  10. Assertion : HClO4 is a stronger acid than HClO3 Reason : Oxidation ...

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  11. Assertion : The covalence of nitrogen in N2O5 is 5. Reason : Nitrog...

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  12. Assertion: Molecular nitrogen is less reactive than molecular oxygen ...

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  13. Assertion : On cooling, the brown colour of nitrogen dioxide disappear...

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  14. Assertion : Elementary phosphorus exists in three principal allotropic...

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  15. Assertion : H-S-H bond angle in H2S is closer to 90^@ but: H-O-H bond ...

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  16. Assertion : HOF bond angle is higher than HOCI bond angle in HOX. 'R...

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  17. Assertion : Noble gases have positive electron gain enthalpy. Reaso...

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  18. Assertion : The O-O bond length in H2O2 is shorter than that of O2F2 ...

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  19. Assertion : The aqueous solution of XeF2 is powerful oxidising agent. ...

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  20. Assertion : Superoxides of alkali metals are paramagnetic. Reason :...

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