Coordinated Covalent Bond

Q.

What is covalency?

Q.

What type of bonding exists in $H_3{O}^{+}$ ion?

Q. Which of the following contains a coordinate covalent bond?

1. $N{H}_{3}B{F}_3$

2. $BaC{l}_2$

3. $H_{2}O$

4. HCl

Q.

The correct sequence of decrease in the bond angles of the following hydrides is

1. NH₃> AsH₃> PH₃> SbH₃

2. SbH₃> AsH₃> PH₃> NH₃

3. PH₃> NH₃> AsH₃> SbH₃

4. NH₃> PH₃> AsH₃> SbH₃

Q.

The hybridization of the chlorine atom in ${\mathrm{CIF}}_3$ molecule is:

1. $sp$

2. $s{p}^2$

3. $s{p}^3$

4. $s{p}^{3}d$

Q.

A simple example of a coordinate covalent bond is exhibited by

1. NH₃

2. HCl

3. C₂H₂

4. H₂SO₄

Q.

What is the shape of Xenon difluoride?

Q.

Chemical nitrogen is more reactive than atmospheric nitrogen.

1. True
2. False

Q. Hydrogen gas $\left(H_2\right)$ is used as a fuel in rockets and space shuttles. The two hydrogen atoms in $H_2$ gas are bonded to each other by:

1. gaining of electrons
2. forming ions
3. sharing an electron pair
4. transfer of electrons

Q.

What are the terms defined by the following:

A bond formed by a shared pair of electrons with both electrons coming from the same atom.

Q. "Hybridisation of central atom does not always change due to back bonding". This statement is valid for which of the following compounds ?
(i) $CC{l}_3^{-}$ (ii) $CC{l}_2$
(iii) $(Si{H}_3{)}_{2}O$ (iv) $N(Si{H}_3{)}_3$

1. All
2. (i), (ii)
3. (i), (iii)
4. (ii), (iii)

Q. A molecule of ${\mathrm{NH}}_3{\mathrm{BF}}_3$has a dative bond. The donor atom in the bond is and acceptor atom is .

1. nitrogen
2. hydrogen
3. boron
4. fluorine

Q.

Choose the right answer(s):
Pick the strongest and the weakest acid among the following :

1. HF

2. HCl

3. HBr

4. HI

Q. Question 5 (a)
What is the physical state of water at— $\left(a\right){25}^{\circ }C$

Q. Match the following compounds with the types of bonds present in them.

1. Ionic
2. Covalent
3. Covalent & coordinate

Q. Coordinate covalent bond is absent in:

1. adduct of $N{H}_3$ and $B{H}_3$
2. $\left[Fe\right(CN{)}_6{]}^{4-}$
3. $H_3{O}^{+}$
4. $PC{l}_3$

Q.

What is the primary requirement for a compound to be a good conductor of electricity?

1. Presence of free electrons

2. Presence of free ions

3. Compound should have covalent bonds

4. Neutral atoms

Q. The type of bond present in $N_2{O}_5$ are __________.

1. ionic and covalent.
2. covalent and coordinate.
3. only covalent.
4. only ionic.

Q. The chemical symbol of copper is _____.

1. Co
2. Cu
3. C
4. Ce

Q. Dative bond is present in the molecule :

1. $N{H}_3$
2. $C{O}_2$
3. None of these.
4. $NaCl$

Q.

H-bonding is maximum in _____

1. Ph - OH

2. Ph - COOH

3. C₂H₅OH

4. CH₃ - CO - CH₃

Q. Formation of dative bond involves only transfer of electrons from donor to acceptor.

1. True
2. False

Q.

Point out the mistakes in the following and correct them:

${\mathrm{CUSO}}_4$

Q. Which of the following species cannot act as an electron pair donor for the formation of dative bond?

1. H${}_3$I${}^{+}$
2. OH${}^{-}$
3. NH${}_4^{+}$
4. NH${}_3$

Q. Coordinate covalent compound are formed by

1. Sharing of electrons
2. Transfer of electrons
3. Donation of electrons
4. None of these process

Q. Coordinate bond is also known as bond.

1. ionic
2. dative
3. molecular
4. acceptor

Q. Which one of the following is not an electron deficient compound?

1. $BC{l}_3$
2. $AlC{l}_3$
3. $B_2{H}_6$
4. $A{l}_{2}C{l}_6$

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. there is no interaction between the two fluorine atoms.
4. equally shared between the two fluorine atoms.

Q. The number of dative bonds in sulphuric acid molecule is

1. 0
2. 1
3. 2
4. 4

Q. Which of the following can provide an electron pair for the formation of a coordinate covalent bond?

1. $H^{+}$
2. $H^{-}$
3. $H_2$
4. $H{e}^{2+}$