Tag: chemical bonding and structure

Quizzes (8) Questions (141)

Questions Related to chemical bonding and structure

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

Which of the following species contain coordinate covalent bond :

  1. $AlCl _3$
  2. $CO$
  3. $[Fe(CN) _6]^{4-}$
  4. $N _3^-$
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
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 $Cl$.
Multiple choice chemistry chemical bonding and structure coordinate bond types of bonds and properties chemical bond and chemical equation

Coordinate bond is denoted and named respectively as:

  1. arrow, dative bond

  2. dots, dative bond

  3. arrow, covalency

  4. dots, hydrogen bond
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Which of the following molecules contains covalent and coordinate bonds?

  1. $CCl _4$
  2. $H _2SO _4$
  3. $NaCl$
  4. $Mg(OH) _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
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.
$NH _3 + H^+ \rightarrow NH _4^+$

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

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

  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. $\displaystyle HCl$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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

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

Which one of the following contains just one sigma bond?

  1. $\displaystyle { H } _{ 2 }$
  2. $\displaystyle { CO } _{ 2 }$
  3. $\displaystyle { H } _{ 2 }O$
  4. $\displaystyle NaCl$
  5. $\displaystyle { CH } _{ 2 }{ CH } _{ 2 }$
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Consider following compounds:


$I: K _4[Fe(CN) _6], II:NH _4Cl, III: H _2SO _4$ 

Ionic, covalent and coordinate bonds are present in :

  1. I, II and III

  2. I and III

  3. II and III

  4. I and II
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$H _{2}SO _{4}$  has $3$ types of bonds- ionic, covalent and coordinate. Sulphur is the central atom,surrounded by $4$ oxygen atoms and $2$ hydrogen atoms places on left of any $2$ oxygen atoms. Now, oxygen shares one electron each with the sulphur and hydrogen atom. But by this only $2$ oxygen atoms will be able to complete octet. The remaining $2$ will complete by coordinate bonding. Both the oxygen atoms will take electrons from sulphur but sulphur won't take theirs ie sharing from only one end. This is called coordinate bond. Hydronium ions are attached with sulphate ions using ionic bonding
${ K } _{ 4 }[{ Fe(CN) } _{ 6 }]\ $: has ionic bond between ${ K }^{ + }and  { [{ Fe(CN) } _{ 6 }] }^{ 4- }$, coordinate bonding in $CN$ and covalent bond in ${ [{ Fe(CN) } _{ 6 }] }^{ 4- }$
$\ { NH } _{ 4 }Cl\ $: has ionic bond between $\ { { NH } _{ 4 } }^{ + }and  { Cl }^{ -}$, coordinate bonding in $\ { { NH } _{ 4 } }^{ + }$ and covalent bond in $\ { { NH } _{ 3 } .}^{  }\quad \$

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

Which of the following contains a coordinate covalent bond ?

  1. $N _2H^{+} _{5}$
  2. $BaCl _2$
  3. $HCl$
  4. $H _2O$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

${ N } _{ 2 }{ H } _{ 5 }^{ + }$ is formed from ${ N } _{ 2 }{ H } _{ 4 }$ which has a lone pair of electrons on $'N'$ and positive charge on $'H'$ takes away its electron and to complete duplet, a co-ordinate bond is present from $N$ to $H$.

$H _4N _2 + H^+ \rightarrow[H _4N _2\to H]^+$

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

Which of the following molecule has dative bond?

  1. CO
  2. $CO _3^{2-}$
  3. $SO _4^{-2}$

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon monoxide (CO) contains a dative (coordinate) bond where oxygen donates a lone pair to carbon to complete its octet. While other options also involve coordinate bonding in their Lewis structures, CO is the most classic example of a simple molecule defined by this feature.