Two oxides of nitrogen, NO and NO2 are allowed to react together at 243° K and form a coloured compound of nitrogen (X). When compound (X) reacts with water to yield another compound of nitrogen (Y). The shape of the anion of (Y) molecule is :

(a) triangular planar                              (b) triangle pyramidal

(c) tetrahedron                                      (d) square planar 

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Consider the following sequence of reaction.

Na+NH3(g)XN2OYHeatZGas Pure

Identify [Z] gas :

(a) N2

(b) NH3

(c) O2

(d) H2

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Which of the following statements is true? 

1. NH3 is less soluble than PH3 in water
2. NH3 is a stronger base and stronger reducing agent than PH3
3. NH3  has a higher boiling point than PH3 and has a lower melting point than PH3
4. PH3 is a stronger reducing agent than NH3 and it has lower melting critical temperature than NH3

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Which of the following on heating produces NO2?

(a) NaNO3                               (b) AgNO3

(c) NH4NO3                              (d) NH4NO2

Subtopic:  Group 15 - Preparation, Properties & Uses |
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A+H2OB+HCl
B+H2OC+HCl

Compound (A),(B) and (C) will be respectively :

(a) PCl5, POCl3, H3PO3                 (b) PCl5, POCl3, H3PO4

(c) SOCl2, POCl3, H3PO3               (d) PCl3, POCl3, H3PO4

Subtopic:  Group 15 - Preparation, Properties & Uses |
 60%
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Which of the following is in the correct sequence?

[For the correct order mark (T) and for the incorrect order mark (F)]:

(a) Lewis acidity order SiFSiClSiBrSiI4
(b) Melting point NHSbHAsHPH3
(c) Boiling point NHSbHAsHPH3
(d) Dipole moment order NHSbHAsHPH3
 
(a) (b) (c) (d)
1. F T F T
2. T F T F
3. F F T T
4. F F T F
Subtopic:  Group 15 - Preparation, Properties & Uses |
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Incorrect statement regarding PH3 is:

1. It is produced by the hydrolysis of Ca3P2

2. It gives a black ppt, Cu3P2 with a CuSO4 solution.

3. It spontaneously burns in the presence of P2H4

4. It does not react with B2H6

Subtopic:  Group 15 - Preparation, Properties & Uses |
 61%
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Which of the following compound does not produce oxyacid of central atom on hydrolysis?

(1) BF3                           

(2) NCl3

(3) SF4                           

(4) PCl5

Subtopic:  Group 15 - Preparation, Properties & Uses |
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The false statement regarding hydrides from the 15th group is:

1. NH> PH> AsH> SbH> BiH3 Thermal stability
2. N-H > P-H > As-H > Sb-H > Bi-H E-H bond dissociation enthalpy
3. NH> PH> AsH> SbH> BiH3 Reducing character
4. NH> PH> AsH> SbH> BiH3 Basicity

Subtopic:  Group 15 - Preparation, Properties & Uses |
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A non-metal M forms MCl3, M2O5 and Mg3M2 but does not form MI5. Then incorrect statement regarding non-metal M is:

(a) M can form multiple bond

(b) M is of second period element 

(c) Atomicity of non-metal is 4

(d) The range of oxidation number for M is +5 to -3

Subtopic:  Group 15 - Preparation, Properties & Uses |
 55%
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