4.1 Lewis Structure

All of the following are exceptional to octet rule, EXCEPT:

• AlCl₃

• SO₂

• SF₄

• NO₂

All of the following is correct, EXCEPT

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Choose the CORRECT bonding for x, y and z for the NH₄Cl showing below:

• x= covalent bond, y= covalent bond, z= metallic bond

• x= dative bond, y=covalent bond, z= ionic bond

• x= covalent bond, y= dative bond, z= ionic bond

• x=Hydrogen bond, y= dative bond, z= ionic bond

Which of the following species can accept lone pair electrons to form dative bonds?

• BF₃

• H₂O

• NH₃

• H₂S

Lewis structure ICl₃ is given as follows.

The formal charges on iodine and chlorine are:

• Iodine: 0

  Chlorine:0

• Iodine: -1

  Chlorine:0

• Iodine: -1

  Chlorine:-1

• Iodine: 0

  Chlorine:-1

There are several structures of N₂O. Choose the most plausible Lewis structure for N₂O.

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The valence electronic configuration of the element X and Y are

X : ns¹ Y : ns² np⁴

The formula and the type of bond formed by the elements could be

• X₂Y , ionic

• X₂Y , covalent

• XY₂, ionic

• XY₂, covalent

The electronic configuration of element P and Q are as follows:

P: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹

Q: 1s² 2s² 2p⁵

When P and Q combine to form a compound, determine the most possible formula of this compound and the type of bonding between them

• Formula: PQ₃

  Type of bonding: covalent

• Formula: P₃Q

  Type of bonding: covalent

• Formula: PQ₃

  Type of bonding: electrovalent

• Formula: P₂Q₃

  Type of bonding: electrovalent

The ammonium chloride is held by the following chemical bonds EXCEPT

• Ionic bond

• Covalent bond

• Coordinate bond

• Hydrogen bond

The total valence electron in the phosphonium ion, PH₄⁺ is:

• 8

• 9

• 12

• 10