NDA Chemistry - Chemical bonding

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Question - 1

What is the necessary condition for a ionic compound to be soluble in water?

  • A \(\Delta { H }_{ hyd }>\Delta { H }_{ lattice }\)
  • B \(\Delta { H }_{ lattice }>\Delta { H }_{ hyd }\)
  • C \(\Delta { H }_{ hyd }=\Delta { H }_{ lattice }\)
  • D None of the above

Question - 2

Which of the following has the highest value of lattice energy?

  • A MgO
  • B Al2O3
  • C CaO
  • D Na2O

Question - 3

Arrange the following ionic compounds in the order of increasing ionic character.  

KF KCl KBr KI
(A) (B) (C) (D)
  • A A
  • B D
  • C B
  • D C

Question - 4

The molecule which contains ionic as well as covalent bond is 

  • A NH4Cl
  • B H2O
  • C CaCl2
  • D CCl4

Question - 5

Which is the most covalent?

  • A C -- F
  • B C -- O
  • C C -- S
  • D C -- Br

Question - 6

The molecule having zero dipole moment is 

  • A ClF3
  • B CH4
  • C PH3
  • D CH2Cl2

Question - 7

The correct order of decreasing polarity is 

  • A HF>SO2>H2O>NH3
  • B HF>H2O>SO2>NH3
  • C HF>NH3>SO2>H2O
  • D H2O>NH3>SO2>HF

Question - 8

In \({ NO }_{ 3 }^{ - }\) ​​​​​​​ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are

  • A 2,2
  • B 3,1
  • C 1,3
  • D 4,0

Question - 9

What is the structure of XeF6 ?

  • A Tetrahedral
  • B Distorted octahedral
  • C Octahedral
  • D None of the above

Question - 10

Of the three molecules XeF4, SF4, SiF4; which have tetrahedral structure?

  • A All three
  • B SiF4 and SF4
  • C Only SiF4
  • D Only SF4
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