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(A) : PF(5),PCl(5) and PBr(3) are known,...

(A) : `PF_(5),PCl_(5) and PBr_(3)` are known, the pentahalides of nitrogen have not been observed
(R ) Phosphorous has lower electronegativity than nitrogen.

A

Both A & R are true, R is the correct explanation of A

B

Both A & R are true, R is not correct explanation of A

C

A is true, R is false

D

A is false, R is true

Text Solution

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The correct Answer is:
B
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(A) NCl_(3) is known, but not NCl_(5) (R ) Nitrogen can not expand its valency beyond four.

(A) Nitrogen can not form more than three bonds (R ) Nitrogen has three valence electrons.

(A) : Nitrogen has higher ionization energy than that of oxygen. (R ) : Nitrogen atom has smaller atomic size than that of oxygen.

(A) Xenon fluorides are well known and stable but the corresponding chlorides have not been reported. (R) 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.

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(A) Among 15^(th) group elements nitrogen has the least B.P where as Bi has the high B.P than N. (R ) Nitrogen is a non metal where as Bi is a metal

(A) PCl_(5) is more covalent than PCl_(3) (R ) Polarising power of P^(5+) is greater than that of P^(3+)

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AAKASH SERIES-VA GROUP ELEMENTS-OBJECTIVE EXERCISE - 1 (NITRIC ACID)
  1. Catalyst in the Ostwald's process is

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  2. Moles of oxygen that can oxidise on mole of NH(3) to NO

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  3. Which of the following is used in pyro-techniques

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  4. Percentage of nitric acid obtained in Ostwald's process is

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  5. (A) : P(4) is more reactive than N(2). (R ) : P-P bonds are relative...

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  6. (A): Nitrogen can form pentahalides (R): Nitrogen does not possess v...

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  7. (A): H(3)PO(3) and H(3)PO(4) are tribasic acids (R) : H(3)PO(3) has ...

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  8. (A): NH(3) is a liquid while the other hydrides of V-A Group elements ...

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  9. (A): Thermal stability of VA group hydrides decreases from NH(3) to Bi...

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  10. (A): HNO(3) is a stronger acid than HNO(2). (R): There are two nitro...

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  11. (A): NO(3)^(-) and CO(3)^(-2) ions are isoelectronic. (R): Nitrate i...

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  12. (A): NO(3)^(-) ion is light bluish in colour. (R): NO(3)^(-)  ion is...

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  13. (A): PF(5) and IF(5) have similar shapes (R): PF(5) has two types of...

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  14. (A): Nitrous oxide is called laughing gas. (R): Nitrous oxide is a l...

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  15. (A): Nitrogen is unable to show a valency more than three. (R): Nitr...

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  16. (A): Central atom usually forms three single and one double bonds in a...

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  17. (A): Phosphorus is more reactive element of Group VA (R): N-=N bond ...

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  18. (A): Orthophosphoric acid can form two acidic salts and one normal sal...

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  19. (A) : PF(5),PCl(5) and PBr(3) are known, the pentahalides of nitrogen ...

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  20. (A) : Nitrogen has higher ionization energy than that of oxygen. (R ...

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