Practice Pakistan's most useful MCQs for competitive exams

Force responsible to hold atoms together in a compound is called ________________?

• (A)  Bond
• (B)  Attractive force
• (C)  Interaction
• (D)  All of above represent same entity

Answer

Submitted By :Ali Uppal

A specie with maximum number of unpaired electrons ?

• (A)  F
• (B)  H2O
• (C)  HF
• (D)  NH-2

Answer

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Measurement of the degree of polarity is___________________?

• (A)  Electron affinity
• (B)  Ionic character
• (C)  Ionization energy
• (D)  Dipole moment

Answer

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Which of the solid does not contain covalent bond________________?

• (A)  Copper
• (B)  Ice
• (C)  Diamond
• (D)  Graphite

Answer

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Which of the following will have highest value of electron affinity_________________?

• (A)  F
• (B)  Cl
• (C)  Br
• (D)  I

Answer

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The relative attraction of the nucleus for the electrons in a chemical bond is called _________________?

• (A)  Ionization energy
• (B)  Electron affinity
• (C)  Electro negativity
• (D)  None of the above

Answer

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Unit of dipole moment is_________________?

• (A)  Debye
• (B)  Poise
• (C)  Pascal
• (D)  Newton

Answer

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Bond order for N2 molecule is __________________?

• (A)  2
• (B)  1
• (C)  3
• (D)  4

Answer

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Molecular orbital which have higher energy than atomic orbitals is called___________________?

• (A)  Bonding molecular orbital
• (B)  Antibonding molecular orbital
• (C)  Hybrid orbital
• (D)  Super atomic orbital

Answer

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Pi bonds are produced by overlapping of__________________?

• (A)  Un-hybrid orbitals
• (B)  Hybrid orbitals
• (C)  Hybrid and un hybrid orbitals
• (D)  atomic orbital and hybrid orbital

Answer

Submitted By :Ali Uppal