Properties of Coordinated Covalent Compounds

Q.

Which is the strongest chemical bond?

Q.

The types of bonds present in ${\mathrm{NH}}_4\mathrm{Cl}$ are

Q.

Difference Between electrovalent and covalent bonds

Q. The bond that exists between $N{H}_3$ and $B{F}_3$ is called ___ .

Q. Question 15
Pentane has the molecular formula ${\text{C}}_5{\text{H}}_{12}$. It has
(a) 5 covalent bonds
(b) 12 covalent bonds
(c) 16 covalent bonds
(d) 17 covalent bonds

Q. Question 1
Ethane with the molecular formula ${\text{C}}_2{\text{H}}_6$ has:
(a) 6 covalent bonds
(b) 7 covalent bonds
(c) 8 covalent bonds
(d) 9 covalent bonds

Q. The pair of electrons which forms a bond between two similar fluorine atoms will be:

1. unequally shared between the two similar fluorine atoms.
2. completely transferred from one fluorine atom to the other.
3. equally shared between the two fluorine atoms.
4. there is no interaction between the two fluorine atoms.

Q. In the formation of electrovalent compounds; electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?​

Q.

name the types of bond present in CuSO₄ .5H₂O

Q.

The purest form of carbon is diamond.

1. True
2. False

Q. Which type of bond is formed by sharing a pair of electrons entirely provided by one atom?

1. Metallic
2. Ionic
3. Coordinate
4. Covalent

Q.

a) Write the chemical formula of calcium carbonate.

b) Which gas is formed when calcium carbonate reacts with acids?

c) Graphite, which is an allotrope of carbon, is a conductor of electricity. But diamond, another allotrope, is not a conductor of electricity. Why?

Q. Discuss in brief about the properties of coordinate covalent compounds. [3 Marks]

Q. Which response includes only the true statements concerning the characteristics of covalent compounds?
$I$. These compounds can be gases, liquids, or solids with low melting points.
$II$. Most are soluble in polar solvents.
$III$. Liquid and molten compounds do not conduct electricity.
$IV$. Aqueous solutions of these compounds are very good conductors of electricity.

1. $II$ and $IV$
2. $I,III$ and $IV$
3. $I,II$ and $III$
4. $I$ and $III$

Q. The decreasing order of bond angles in $B{F}_3,N{H}_3,P{F}_3$ and $I_3^{-}$ is:

1. $I_3^{-}>N{H}_3>P{F}_3>B{F}_3$
2. $B{F}_3>I_3^{-}>P{F}_3>N{H}_3$
3. $B{F}_3>N{H}_3>P{F}_3>I_3^{-}$
4. $I_3^{-}>B{F}_3>N{H}_3>P{F}_3$

Q. Compound 'X' conducts electricity in the aqueous solution or molten state. Compound 'Y' conducts electricity in the aqueous solution only. Compound 'Z' does not conduct electricity in the molten state or in aqueous solution. Predict the nature of bonds in X, Y and Z.

Q.

Water is liquid at room temperature due to weak hydrogen bonds.

1. True

2. False

Q. The covalency of $N$ in $N{H}_4^{+}$ ion is equal to number of:

1. covalent bonds
2. co ordinate bonds
3. covalent bonds and co ordinate bonds
4. valence electrons

Q. Complete the following reaction:
$H_{2}O\left(l\right)+$$\rightleftharpoons H_3{O}^{+}+$

1. $H_{2}O$(l)
2. $O{H}^{-}$(aq)
3. $O_2$(g)
4. $H_2$(g)

Q. What is unique about the bonds in coordination compounds?

1. One of the atoms or ions donates both shared electrons
2. The metal is bonded to ligands
3. Both of the atoms or ions donate both shared electrons
4. The bond is an ionic bond
5. The bond is a covalent bond

Q. Non polar molecules are :

1. $C{H}_4$
2. $C_2{F}_2$
3. $O{F}_2$
4. $C_2{F}_4$

Q. Which of the following property is commonly exhibited by a covalent compound?

1. Low melting point
2. High solubility in water
3. High boiling point
4. High electrical conductance

Q. Which of the following species has higher melting point?
(i) $NaCl$ or $CuCl$ (ii) $Ca{F}_2$ or $Ca{I}_2$ (iii) $CaC{l}_2$ or $CdC{l}_2$

Q. The pair of valence electrons which participate in bonding is termed as bond pair.

1. True
2. False

Q. Consider following compounds:

1. I, II and III
2. I and III
3. II and III
4. I and II

Q. Which type of bond is formed by a complete transfer of electron(s)?

1. Metallic
2. Ionic
3. Covalent
4. Valency

Q. Which of the following does not have coordinate bond?

1. $S{O}_2$
2. $HN{O}_2$
3. $HN{O}_3$
4. $H_{2}S{O}_3$`

Q. The repulsions are the strongest repulsions in a molecule.

1. lone pair - lone pair
2. lone pair - bond pair
3. bond pair - bond pair

Q. Co-ordinate covalent compounds dissolve more in:

1. polar solvents
2. water only
3. non polar solvents
4. both polar and nonpolare compounds

Q. what is polar solvent ?? also give an example