Tag: coordinate bond

Questions Related to coordinate bond

Co-ordinate covalent bond is formed by:

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

  1. transfer of electrons

  2. sharing of electrons

  3. donation of electrons

  4. none of these process

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Correct Option: C
Explanation:

Both the electrons of a coordinate bond are donated by one atom, and then shared by both the atoms of the bond.

In potassium ferrocyanide, the nature of bond between iron and cyanide ions is :

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

  1. ionic bond

  2. covalent bond

  3. dative bond

  4. polar bond

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Correct Option: C
Explanation:

In potassium ferrocyanide, iron atom has vacant orbitals and cyanide ions have unpaired electrons. Hence, in potassium ferrocyanide, the bond between iron and cyanide ions is dative bond.

Phosphorus forms a compound with hydrogen called phosphine, $PH _{3}$. This compound can react
with a hydrogen ion, $H^{+}$.
Which type of interaction occurs between $PH _{3}$ and $H^{+}$?

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

  1. Dative covalent bond

  2. Dipole- dipole forces

  3. Hydrogen bond

  4. Ionic bond

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Correct Option: A
Explanation:

The bond formed between $P{H} _{3}$ and ${H}^{+}$ is dative covalent bond in which the bonding electrons are coming from phosphine.

Coordinate compounds are formed by

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

  1. Transfer of electrons

  2. Sharing of electrons

  3. Donation of electron pair

  4. None of these

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Correct Option: C

Co-ordinate covalent compounds dissolve more in:

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

  1. polar solvents

  2. non polar solvents

  3. both polar and nonpolare compounds

  4. water only

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Correct Option: A
Explanation:

Coordinate covalent components have la slight dipole moment. So they are less solube in nonpolar solvents compared to polar solvents.

In which of the following, all four types of bonds, i.e., ionic, covalent, dative and hydrogen bonds are present?

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

  1. $Ice$

  2. $BeSO _{4}.4H _{2}O$

  3. $CuSO _{4}.5H _{2}O$

  4. $BaCl _{2}.2H _{2}O$

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Correct Option: C
Explanation:

$CuSO _4\cdot 5H _2O$ exists as $[Cu(H _2O) _4]^{2+} SO _{4}^{2-}\cdot H _2O$.
It has dative bonds in $[Cu(H _2O) _4]^{2+}$, which is between water molecules and Cu. There is an ionic bond between the coordination sphere and $SO _4^{2-}$ ion. Covalent bond between S and O in  in $SO _4^{2-}$ ions and between H and O in water molecules Within the molecules of $H _2O$, there is hydrogen bonding. 

Which of the following contains a coordinate covalent bond?

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

  1. Water

  2. Ammonia

  3. Ammonium ion

  4. Ethylene

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Correct Option: C
Explanation:

In $NH _4^+$ the $N$ forms a co-ordinate covalent bond with one $H$ by utilizing the lone pair of electrons.

Name an ion which combines with a polar covalent molecule to form an ammonium ion?

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

  1. Hydrogen

  2. Chlorine

  3. Fluorine

  4. All of these

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Correct Option: A
Explanation:

Ammonium ions are formed by transfer of a hydrogen ion from HCl to the lone pair of electrons on the ammonia molecule.

Two elements have electronegativity of $1.2$ and $3.0$. Bond formed between them would be :

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

  1. ionic

  2. polar covalent

  3. co-ordinate

  4. metallic

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Correct Option: A
Explanation:

The electronegativity difference between the two atoms is $3.0 - 1.2 = 1.8$. It is large, hence, the bond formed is an ionic bond. The more electronegative atom gains one or more electrons to form an anion and the less electronegative atom loses one or more electrons to form a cation. 

A co-ordinate bond is formed when atom in a molecule has:

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

  1. all its valency shell electrons shared

  2. a single unshared electron

  3. one or more unshared electron pair

  4. electric charge on it

Show answer
Correct Option: C
Explanation:

A co-ordinate or dative bond is a covalent bond(a shared pair of electrons) in which both the electrons come from the same atom. It is shown by an arrow and the arrow points from atom donating the lone pair to accepting atom.$\quad \quad H\ \quad \quad \quad |\ H-{ N }^{ + }\rightarrow H\ \quad \quad \quad |\ \quad \quad H$