In which of the following compounds BF bond length is shortest ?

(a) BF4-       (b) BF3NH3

(c) BF3         (d) BF3NCH33

Subtopic:  Hybridisation |
 55%
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In terms of polar character which of the following order is correct?

1. NH3<H2O<HF<H2S   

2. H2S<NH3<H2O<HF

3. H2O<NH3<H2S<HF   

4. HF<H2O<NH3<H2S

Subtopic:  Polarity |
 77%
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The correct order of boiling point among the following is:

1. T2<D2<H2                                 

2. n-pentane<neo pentane

3. Xe < Ar < He

4. m-nitrophenol > o-nitrophenol

Subtopic:  Types of Chemical Bond |
 57%
From NCERT
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The correct order of 'SO' bond length is:

1. \(\mathrm{SO}_3^{2-}>\mathrm{SO}_4^{2-}>\mathrm{SO}_3>\mathrm{SO}_2 \)
2. \(\mathrm{SO}_3^{2-}>\mathrm{SO}_4^{2-}>\mathrm{SO}_2>\mathrm{SO}_3 \)
3. \(\mathrm{SO}_4^{2-}>\mathrm{SO}_3^{2-}>\mathrm{SO}_2>\mathrm{SO}_3 \)
4. \(\mathrm{SO}_4^{2-}>\mathrm{SO}_3^{2-}>\mathrm{SO}_3>\mathrm{SO}_2\)
Subtopic:  Resonance & Nature of Compounds |
From NCERT
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The linear structure is possessed by :

(1) SnCl2

(2) NCO-

(3) NO2+

(4) CS2

 

Subtopic:  Hybridisation |
 52%
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Cis-butene dioic acid Ka1{-H+}X-1Ka2{-H+}X22-

Trans-butene dioic acid Ka1'{-H+}Y-1Ka2·{-H+}Y22-

The incorrect statement regarding above the information is:

(1) X22- species is more basic than Y22- species 

(2) X1- species is more basic than Y1- species

(3) Ka1 is greater than K'a2 

(4) K'a2 is greater than K'a2

Subtopic:  Acidic, Basic Character & Fajan's Rule |
 51%
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In which of the following compounds octet is complete and incomplete for all atoms:

         Al2Cl6      Al2CH36       AlF3      Dimer of BeCl2     Dimer of BeH2

(1)      IC               IC                   IC                     C                         C

(2)      C                IC                   IC                     C                         IC

(3)      C                IC                    C                     IC                        IC

(4)      IC                C                    IC                    IC                        IC

where C denotes Complete and IC incomplete.

Subtopic:  Covalent Bond |
From NCERT
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A compound having a metal-to-metal bond is:

1. Cupric chloride           

2. Stannous chloride

3. Mercurous chloride     

4. Mercuric chloride

Subtopic:  Types of Chemical Bond |
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Which of the following pair of elements can form an ionic compound?

1. \(\mathrm{Na}\) and \(\mathrm{Ca}\) 2. \(\mathrm{K}\) and \(O_2\)
3. \(O_2\) and \(Cl_2\) 4. \(Al\) and \(I_2\)
Subtopic:  Ionic Bond |
 60%
From NCERT
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The type of molecular forces of attraction present in the following compound is:

1. Intermolecular H-bonding. 2. Intramolecular H-bonding.
3. Van der Waal's force. 4. All of the above.
 

Subtopic:  van der Waal Force & Hydrogen Bonding |
 65%
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