Correct regarding edges and faces in lF7 respectively 

1.  15, 10

2.  10, 10

3.  7, 15

4.  15, 7

Subtopic:  Introduction & Crystal System |
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Electronegativity of A and B is 1 and 4 respectively. The percentage of the covalent character of AB is

1.  79.5%

2.  8%

3.  20.5%

4.  25%

Subtopic:  Polarity |
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The bond energies in NO, NO+ and NO- follow the order

1.  NO+ > NO > NO-

2.  NO > NO+ > NO-

3.  NO- > NO > NO+

4.  NO+ > NO- > NO

Subtopic:  M.O.T |
 76%
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The element which readily forms an ionic bond has the electronic configuration

1. 1s22s22p3

2. 1s22s22p1

3. 1s22s22p2

4.1s22s22p63s1

Subtopic:  Ionic Bond |
 79%
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The correct of FX^F bond angle (X = central atom) in CF4, POF3 and SO2F2 is

1.  SO2F2 < POF3 < CF4

2.  POF3 < CF4< SO2F2 

3.   CF4 < SO2F2 < POF3

4.  POF3 < SO2F2 < CF4

Subtopic:  V.S.E.P.R & V.B.T |
 57%
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In the cyanide ion, the negative charge is on 

1.  C

2.  N

3.  Both C and N

4.  Resonate between C and N

Subtopic:  Types of Chemical Bond |
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The order of electronegativity of carbon in sp, sp2 and sp3 hybridized states follows

1. sp>sp2>sp3

2. sp3>sp2>sp

3. sp>sp3>sp2

4. sp2>sp>sp3

 

Subtopic:  Hybridisation |
 96%
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In which of the dimerization process, the achievement of the octet is not the driving force.

1.  2AlCl3 Al2Cl6

2.  BeCl2BeCl2 solid

3.  2lCl3 l2Cl6

4.  2BH3 B2H6

Subtopic:  Types of Chemical Bond |
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Anhydrous AlCl3 is covalent. If the lattice energy forAlCl3 = 5137 kJ mol-1, hydration for Al3+ = -4665 kJ mol-1 and Hydration for Cl- = -381 kJ mol-1, will it remain covalent or become ionic in aqueous solution?

1.  It will remain covalent

2.  It will remain ionic

3.  It may or may not become ionic

4.  Being ionic or covalent of any molecule is independent of ionisation energy

Subtopic:  Types of Chemical Bond |
 55%
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The melting point of AlF3 is 104°C and that of SiF4 is -77°C (it sublimes) because:

1.  There is a very large difference in the ionic character of the Al - F and Si - F bonds

2.  In AlF3, Al3+ interacts very strongly with the neighboring F- ions to give a three-dimensional structure but in SiF4 no such interaction is possible

3.  The silicon ion in the tetrahedral SiF4 is not shielded effectively from the fluoride ions whereas in AlF3, the Al+3 ion is shielded on all sides

4.  The attractive forces between the SiF4 molecules are strong whereas those between the AlF3 molecule are weak

Subtopic:  Types of Chemical Bond |
 61%
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