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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Which parent oxy acid does not have its own hypo acid?

1. H2SO2                                  
2. HNO2                                            
3. H3PO3                                        
4. HClO3

Subtopic:  Group 16 - Preparation, Properties & Uses |
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Consider the following reactions :

(i) PCl3+3H2OH3PO3+3HCl             
(ii) SF4+3H2OH2SO3+4HF

(iii) BCl3+3H2OH3BO3+3HCl            
(iv) XeF6+3H2OXeO3+6HF

Then according to given information the incorrect statement is :

(1) During the (i) reaction the hybridisation of 15th group element does not 

      changed

(2) During the (ii) reaction the hybridisation of 16th group element 

      changed

(3) During the (iii) reaction the hybridisation of 13th group element does not 

      changed

(4) During the (iv) reaction the hybridisation of 18th group element does not 

      changed

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Consider the oxy acids HClOn series, here value of n is 1 to 4. Then incorrect statement regarding these oxy acids is :

(1) Acidic character of oxy acids increases with increasing value of n.

(2) oxidising power of oxy acids increases with decreasing value of n.

(3) Thermal stability of oxy acids decreases with increasing value of n.

(4) 'ClO' bond order decreases with decreasing value of n  

Subtopic:  Group 17 - Preparation, Properties & Uses |
 50%
From NCERT
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The correct statement regarding CIOn molecular ion is :

(1) On decreasing value of 'n', 'ClO' bond order increases 

(2) On the increasing value of 'n', 'ClO' bond length increases

(3) On the increasing value of n, oxidation number of central atom increases 

(4) On the increasing value of  n, hybrid orbitals on the central atom increase

 

Subtopic:  Group 17 - Preparation, Properties & Uses |
 67%
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In, Cl2O6(l)+HF  P+Q

If H+ of acid HF attaches with Q then correct option for hybrization of Cl-atom

and OCIO in the P and Q ions :

(a) P:sp2;>120°

(b) Q:sp3; 109°28'

(c) P:sp3;<109°28'

(d) Q:sp3;>109°28'

Subtopic:  Group 17 - Preparation, Properties & Uses |
 55%
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Bromine is commercially prepared from sea water by displacement reaction 

                       Cl2+Br(aq)  2Cl(aq)+Br2

Br2 gas thus formed is dissolved into solution of Na2CO3 and then pure Br2 is obtained by treatment of the solution with :

 

(a) Ca(OH)2

(b) NaOH

(c) H2SO4 

(d) HI

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Cl2(g) + Ba(OH)→ X(aq) + BaCl2 + H2O                      
X + H2SO4 → Y + BaSO4                                              
\(\xrightarrow[]{\Delta \ > \ 365 \ K}\) Z + H2O + O2

Y and Z are respectively :
1. HClO4, ClO2
2. HClO3, ClO2
3. HClO3, ClO6
4. HClO4, Cl2O7

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Auto-oxidation of bleaching powder gives :

(1) only calcium chlorate                       

(2) only calcium chloride

(3) only calcium hypochlorite                 

(4) both (a) and (b) 

Subtopic:  Group 17 - Preparation, Properties & Uses |
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The three elements X, Y and Z with electronic configuration shown below all form hydrides :

            Element                                     Electronic configuration
      X                                                  1s22s22p2
      Y                                                  1s22s22p63s1 
      Z                                                   1s22s22p63s23p63d104s24p5

Which set of properties match correctly with properties of the hydrides of these elements :

     Hydride of X                                      Hydride of Y                                   Hydride of Z

(a) Colourless gas insoluble in        Silver/grey solid reacts with H2O      Colourless gas forms a strong

        H2O                                        to form an alkali                                 acid in H2O

(b) Colourless liquid, no reaction    Silver/grey solid forms H2 and          Ionic solid with formula ZH

        with H2O                                  H2O                                

(c) Non-polar compound reacts       Silver/grey ionic solid with               Forms when water is added

     with Cl2 in light                            formula YH2                                 to phosphorus and element Z

(d) Colourless gas which burns        Silver/grey solid which reacts           Colourless, corrosive liquid

          with air                                     violently with acids                             at STP

Subtopic:  Group 17 - Preparation, Properties & Uses |
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