Tag: coordinate bond

Questions Related to coordinate bond

Which of the following compounds contain a coordinate covalent bond?

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. $Ba{Cl} _{2}$

  2. $CaCl$

  3. ${K} _{2}O$

  4. ${N} _{2}{H} _{3}^{+}$

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Correct Option: D
Explanation:

$\displaystyle {N} _{2}{H} _{3}^{+}$ contain a coordinate covalent bond.
$\displaystyle H-N=\underset{\displaystyle \underset{\displaystyle H}{\downarrow}}{N}^+-H$
The N atom is the donor atom and H atom is the acceptor atom.

The bonds present in $K _4[Fe(CN) _6]$ are:

chemistry chemical bond and chemical equation coordinate bond types of bonds and properties chemical bonding and structure

  1. all ionic

  2. all covalent

  3. ionic and covalent

  4. ionic, covalent and coordinate covalent 

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Correct Option: D
Explanation:

The bonds present in  $\displaystyle K _4 [Fe(CN) _6]$ are ionic, covalent and coordinate covalent bonds. Ionic bonds are present between $\displaystyle K^+$ ion and $\displaystyle [Fe(CN) _6]^{4-}$ ion.
Covalent bonds are present in $\displaystyle C \equiv N$ ligand.
Co-ordinate covalent bonds are present between $\displaystyle Fe$ and $\displaystyle C$ and also in between $\displaystyle C$ and $\displaystyle N$.

Which one of the following statements is true for ammonium ion?

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. All bonds are ionic.

  2. All bonds are dative bonds.

  3. Hydrogen atoms are situated at the corners of a tetrahedron.

  4. None of the above

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Correct Option: C
Explanation:

In $\displaystyle ammonium $ ion $\displaystyle NH _4^+$ three $\displaystyle N-H$ bonds are covalent and one $\displaystyle N-H$ bond is coordinate covalent (dative). $Hydrogen$ atoms are situated at the corners of a tetrahedron as $\displaystyle N$ atom is $\displaystyle sp^3$ hybridised.

Coordinate bond is present in:

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. Hydronium ion

  2. Water

  3. Sulphur dioxide

  4. Ammonia

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Correct Option: A
Explanation:


From the given compounds only Hydronium ion forms a coordinate or dative bond, where $O$ is the donor atom and $H$ is the acceptor.

Hydronium ion can be shown as:
$\displaystyle H _2O \rightarrow H^+$  or $\displaystyle H _3O^+$.
Hence, the correct option is A. 

Which of the following species contain coordinate covalent bond :

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. $AlCl _3$

  2. $CO$

  3. $[Fe(CN) _6]^{4-}$

  4. $N _3^-$

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Correct Option: B,C,D
Explanation:
$:C\equiv O:$ $\rightarrow $ In Carbonyl two covalent bonds are present and one coordinate bond is present from O$\rightarrow $C.
in $[Fe(N{ ) } _{ 6 }{ ] }^{ 4- }\rightarrow $ All bonds are coordinate bond between ${ CN }^{ - }$ and ${ Fe }^{ +2 }$ metal ion.
in ${ N } _{ 3 }^{ - }$$\rightarrow [\overset { \cdot \cdot  }{ \underset { \cdot \cdot  }{ N }  } =N=\overset { \cdot \cdot  }{ \underset { \cdot \cdot  }{ N }  } { ] }^{ - }\longleftrightarrow [\ddot { N } \equiv N-\overset { \cdot \cdot  }{ \underset { \cdot \cdot  }{ N }  } :{ ] }^{ - }$
In ${ N } _{ 3 }^{ - }$ covalent and coordinate both type of bonds are present.
in $Al{ Cl } _{ 3 }$$\rightarrow $ Icovalent bond is present only between $Al $ and $Cl$.

Coordinate bond is denoted and named respectively as:

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. arrow, dative bond

  2. dots, dative bond

  3. arrow, covalency

  4. dots, hydrogen bond

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Correct Option: A
Explanation:

Coordinate covalent bond is a special type of covalent bond in which only one of the bonded atoms contributes the electron pair for sharing.

The coordinate covalent bond is denoted by an arrow and the arrow point towards the acceptor. The other name for it is the dative bond. 

For example, the coordinate covalent bond in $\displaystyle \displaystyle ammonia : boron : trifluoride$ is denoted by an arrow as $\displaystyle \displaystyle H _3N \rightarrow BF _3$.

Hence, the correct option is A.

The covalency of oxygen in hydronium ion is equal to number of:

chemistry chemical bond and chemical equation coordinate bond types of bonds and properties chemical bonding and structure

  1. covalent bonds

  2. coordinate bonds

  3. covalent bonds and coordinate bonds

  4. valence electrons

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Correct Option: C
Explanation:

No. of covalent bonds and coordinate bonds.

In hydronium ion there are $2$ covalent bonds and $1$ coordinate bonds. 

Which of the following molecules contains covalent and coordinate bonds?

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. $CCl _4$

  2. $H _2SO _4$

  3. $NaCl$

  4. $Mg(OH) _2$

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Correct Option: B
Explanation:

Coordinate bond is formed between electron rich and electron deficient atoms. The donor atom should have at least one lone pair of electrons and the acceptor atom should have at least one vacant orbital.

In $NH _4^+$, the nitrogen in $NH _3$ is electron rich and $H^+$ ion do not contain any electron. Thus nitrogen from $NH _3$ share pair of electrons with $H^+$ to make a coordinate bonds.
Other bonds in $NH _3$ are covalent bonds.
$NH _3 + H^+ \rightarrow NH _4^+$

Which of the following will form a coordinate covalent bond with a hydronium ion?

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. $\displaystyle Na{ C } _{ 2 }{ H } _{ 3 }{ O } _{ 2 }$

  2. $\displaystyle { HC } _{ 2 }{ H } _{ 3 }{ O } _{ 2 }$

  3. $\displaystyle KCl$

  4. $\displaystyle { NH } _{ 3 }$

  5. $\displaystyle HCl$

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Correct Option: D
Explanation:

$NH _3$ forms coordinate  bond with the Hydronium ion.

Which one of the following contains just one sigma bond?

chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

  1. $\displaystyle { H } _{ 2 }$

  2. $\displaystyle { CO } _{ 2 }$

  3. $\displaystyle { H } _{ 2 }O$

  4. $\displaystyle NaCl$

  5. $\displaystyle { CH } _{ 2 }{ CH } _{ 2 }$

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Correct Option: A
Explanation:


As the valence shell of $H$ atom has single electron and it forms single sigma bond with itself.


Hence the correct option is A.