Which of the correct sequence in the following properties? For the correct order mark (T) and for the incorrect order mark (F) :

(a)  Lewis acidity order : SiF4<SiCl4<SiBr4<SiI4 

(b) Melting point : NH3>SbH3>AsH3>PH3

(c) Boiling point : NH3>SbH3>AsH3>PH3

(d) Dipole moment order : NH3>SbH3>AsH3>PH3

(a) FTFT        (b) TFTF        (c) FFTT         (d) FFTF

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group 15 ,preparation and properties
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In which of the following compounds hydrolysis takes place through SN1 and SN2 mechanism respectively?

(a) NF3, NCl3                        (b) P4O10, SiCl4

(c) SF4, TeF6                         (d) SiCl4, SiF4 

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Incorrect statement about PH3 is :

(a) It is produced by hydrolysis of Ca3P2

(b) It gives black ppt,(Cu3P2) with CuSO4 solution

(c) Spontaneously burns in presence of P2H4

(d) It does not react with B2H6

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group 15 ,preparation and properties
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Which of the following compound does not produce oxyacid of central atom on hydrolysis?

(a) BF3                            (b) NCl3

(c) SF4                            (d) PCl5

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The incorrect statement regarding 15th group hydrides (EH3)E=N, P, As, Sb, Bi

(a) NH3>PH3>AsH3>SbH3>BiH3 : Thermal stability

(b) N-H>P-H>As-H>Sb-H>Bi-H : E-H bond dissociation enthalpy

(c) NH3>PH3>AsH3>SbH3>BiH3 : Reducing character

(d) NH3>PH3>AsH3>SbH3>BiH3 : Basicity

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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

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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

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group 16,preparation and properties
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In which of the following reaction product does not contain 'Peroxy' linkage?

(a) 2OFDimerisation                               (b) H4P2O8+H2O

(c) 2Naexcess O2                                   (d) None of these 

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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 ?

(a) 1 and 2 only                             (b) 2 and 3 only

(c) 1 and 3 only                              (d) 1, 2 and 3

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Gas that can not be collected over water is :

(a) N2                                    (b) O2

(c) SO2                                  (d) PH3

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