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 |
 76%
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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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The correct order of SS bond length in the following oxyanion is :

(I) S2O42-                  (II) S2O52-                      (III) S2O62-

(a) I>II>III                                      (b) I>III>II

(c) III>II>I                                       (d) III>I>II

Subtopic:  Group 16 - Preparation, Properties & Uses |
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In which of the following reaction product does not contain 'Peroxy' linkage?

1. 2OFDimerisation  

2. H4P2O8+H2O

3. 2Naexcess O2   

4. None of these 

Subtopic:  Group 16 - Preparation, Properties & Uses |
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Consider the following statements in respect of oxides of sulphur.

(1) In gas phase SO2 molecule is V-shape.

(2) In gas phase SO3 molecule is planar.

(3) ySO3 is cyclic trimer.

Which of the above statements are correct ?

(1) 1 and 2 only                             

(2) 2 and 3 only

(3) 1 and 3 only                             

(4) 1, 2 and 3

Subtopic:  Group 16 - Preparation, Properties & Uses |
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The gas that cannot be collected over water is:

1. N2                                   

2. O2

3. SO2                                 

4. PH3

Subtopic:  Group 16 - Preparation, Properties & Uses |
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One gas bleaches the colour of flowers by reduction, while the other gas bleaches by oxidation. The two gases, respectively, are:

1. CO and Cl2                             

2. H2S and Br2

3. NH3 and SO3                           

4. SO2 and Cl2

Subtopic:  Group 16 - Preparation, Properties & Uses |
 79%
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Which of the following halides cannot be hydrolysed at room temperature?

  (I) TeF6                    (II) SF6                    (III) NCl3                          (IV) NF3

(1) III and IV                               

(2) I, II and III

(3) I, II and IV                             

(4) II and IV

 

Subtopic:  Group 16 - Preparation, Properties & Uses |
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