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(A): NH(3) is a liquid while the other h...

(A): `NH_(3)` is a liquid while the other hydrides of V-A Group elements are gases at room temp.
(R) : `NH_(3)` possess inter molecular hydrogen bonds in liquid state

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:
D
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(A) : NH_3 is a liquid while the other hydrides of V-A Group elements are gases at room temperature (R) : NH_3 possess inter molecular hydrogen bonds in liquid state

(A) The heat of formation of NH_(3) is -46.1 KJ/mole (R ) NH_(3) possess intermolecular hydrogen bonds in liquid state

NH_(3) is soluble in water whereas other hydrides of group 15 elements are insoluble in water. Why?

(A) : Water is a liquid whereas sulphurdi oxide is a gas at room temp (R) : Molecular mass of SO_2 is more than that of H_2 O

(A) Among HX , HF is liquid while others are gases (R ) HF has strong hydrogen bond

(A) Ammonia is least volatile among MH_(3) type hydrides of group VA elements. (R ) Molecules of ammonia are held together by strong electrostatic forces

(A) Boiling point of NH_(3) is less than that of SbH_(3) (R ) In NH_(3) hydrogen bonding is observed.

Among the following which is/are correct regarding abnormal properties of lithium in IA group. A) LiHCO_(3) is not obtained in solid state while other hydrogen carbonates are solids B) Reddish brown NO_(2) is not obtained in the thermal decomposition of LiNO_(3) C) Lithium unlike other alkalimetals forns no ethynide on reaction with ethyne D) Lithium is much harder than other alkali metals

Which of the following metals dissolve in liquid NH_(3)

(A): Thermal stability of VA group hydrides decreases from NH_(3) to BiH_(3) (R): The dissociation energy of M - H bond! increases down the group regularly

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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