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Chemical bonding 2 (Termizi 2021)

Total questions: 50

Worksheet time: 2hrs 40mins

Name
Class
Date
1.

What is the exception to octet rule for CCl4

a)

Incomplete octet

b)

Expanded octet

c)

Odd electron

d)

obey octet rule

2.

Two carbon atoms form a linear shaped ethene, C2H4, molecule when bonded with four other hydrogen atoms. Prior to bonding, the carbon atom

a)

does not hybridise

b)

undergoes sp hybridisation

c)

undergoes sp2 hybridisation

d)

undergoes sp3 hybridisation

3.

The molecule that uses sp3d hybrid orbital on the central atom is

a)

BCl3

b)

NCl3

c)

ICl3

d)

PCl3

4.

The hybridisation of the central atom in the following molecules is same EXCEPT

a)

NH3

b)

H2O

c)

AlCl3

d)

C2H6

5.

Which of the following hybrid orbitals is used by the central atom for bonding in CO32-?

a)

sp2

b)

sp3

c)

sp3d

d)

sp3d2

6.

What is the hybridisation of sulphur in SF4 molecule?

a)

sp2

b)

sp3

c)

sp3d

d)

sp3d2

7.

What is the hybrid orbital used by the central atom in SF6

a)

sp2

b)

sp3

c)

sp3d

d)

sp3d2

8.

What is the hybridisation for central atom in IF4-?

a)

sp2

b)

sp3

c)

sp3d

d)

sp3d2

9.

What is the hybridisation of carbon atom in hydrogen cyanide, HCN?

a)

sp

b)

sp2

c)

sp3

d)

sp3d

10.

Molecule CO2

a)

undergoes sp2 hybridisation

b)

has 2 σ bond and 2 π bond

c)

undergoes sp3d hybridisation

d)

is trigonal planar molecule

11.

The central atom that has a hybrid orbital of sp3 is

a)

PCl3

b)

BCl3

c)

H2O

d)

BeH2

12.

What is the exception to octet rule for BF3

a)

Incomplete octet

b)

Expanded octet

c)

Odd electron

d)

obey octet rule

13.

What is the exception to octet rule for BF3

a)

Incomplete octet

b)

Expanded octet

c)

Odd electron

d)

obey octet rule

14.
What is the basis of a metallic bond?
a)
the attraction of neutral metal atoms.
b)
the attraction between protons and neutrons.
c)
the attraction between positive metal ions and interlocking electrons.
d)
the attraction between positive metal ions and free floating electrons.
15.
What is the ability of a substance to be pulled into a thin strand?
a)
Malleability
b)
Ductility 
c)
Conductivity
d)
Solubility
16.
Why do metals conduct
a)
They are shiny
b)
The electrons are held tightly within the lattice
c)
The electrons are delocalised and able to move
d)
The electrons are shared between two metal ions
17.

Why does the melting point of metals increase across period 3, from Sodium (Na) to Aluminium (AI)?

a)

Size of atoms gets smaller

b)

Attraction force between nuclei and free electron increases

c)

Increased space between the valence electrons in the "sea"

d)

Increased number of valence electrons contributed to the "sea"

18.

Metals are malleable, what does this mean?

a)

They can be bent or dented

b)

They can be pulled into long and thin wires

c)

They heat up quickly

d)

They can be taken apart

19.

Which of the following species has only one lone pair electrons at central atom?

a)

BF3

b)

SO2

c)

H2O

d)

Cl2

20.

Choose a species which is a polar compound

a)

SF6

b)

AlCl3

c)

CH3Cl

d)

SnCl4

21.

Choose a species which is a non-polar compound

a)

HCl

b)

PH3

c)

HBr

d)

CO2

22.

What is the exception to octet rule for BF3

a)

Incomplete octet

b)

Expanded octet

c)

Odd electron

d)

obey octet rule

23.

Which group of elements has similar bonds and is arranged in order of increasing melting point?

a)

Na. Mg, Al

b)

Li, K, Na

c)

Pb, Si, C

d)

Cl, S, P

24.

What type of bond is responsible for intermolecular forces in liquid silicon tetrachloride, SiCl4?

a)

hydrogen bonds

b)

permanent dipole-permanent dipole attractions

c)

induced dipole-induced dipole attractions

d)

coordinate covalent bonds

25.

Which physical properties characterises elements with metallic bonds most accurately?

a)

They are highly electropositive

b)

They have high melting point

c)

They are good conductors of electricity in solid state

d)

They are very hard

26.

Which of the following elements forms an ionic hydride?

a)

Silicon

b)

Chlorine

c)

Sodium

d)

Phosphorus

27.

Which of the following compounds has two lone pair of electrons at central atom?

a)

BCl3

b)

HF

c)

SO2

d)

H2O

28.

Which one of the following structure is linear structure?

a)

OCl2

b)

SCl2

c)

CO2

d)

SnCl2

29.

The shape of NH4+

a)

Tetrahedral

b)

square planar

c)

Trigonal planar

d)

Trigonal pyramidal

30.

The hybrid orbitals in C2H2 is

a)

sp2

b)

sp

c)

sp3

d)

sp3d

31.

Which of the species given below does not have coordinate dative bond?

a)

Al2Cl2

b)

[Cu(H2O)]2+

c)

NH4+

d)

BF3

32.

Determine the compound which not obey the octet rules

a)

CO2

b)

SF4

c)

SO42-

d)

H2O

33.

The basic ideas and uses of VSPER is to

a)

Predicting electronegativities

b)

Predicting bond angles

c)

Predicting dipole moment

d)

Predicting bond-length

34.

What is the molecular shape of ClF3?

a)

Trigonal planar

b)

Trigonal bypiramidal

c)

Trigonal pyramidal

d)

T-shaped

35.
What elements generally make an ionic bond?
a)
metal and nonmetal
b)
2 nonmetals
c)
metal
d)
none of the above
36.
What elements generally make a covalent bond?
a)
metal and nonmetal
b)
2 nonmetals
c)
metal
d)
none of the above
37.
Predict the bond that will form between Be and F.
a)
Ionic
b)
Covalent
38.

What is the hybridization of a linear molecule?

a)

sp

b)

sp2

c)

sp3

d)

sp3d

39.

What is the hybridization of a linear molecule?

a)

sp

b)

sp2

c)

sp3

d)

sp3d

40.

The hybridisation of the carbon atom is?

a)

sp

b)

sp2

c)

sp3

d)

sp3d

41.

The hybridisation of the carbon atom is?

a)

sp

b)

sp2

c)

sp3

d)

sp3d

42.

What is the hybridization of this molecule shown.

a)

sp

b)

sp2

c)

sp3

d)

sp4

43.

What is the hybridization of the Carbon atom indicated by the arrow?

a)

sp hybridization

b)

sp2 hybridization

c)

sp3 hybridization

d)

dsp3 hybridization

44.

The hybridisation of the carbon atom is?

a)

sp hybridization

b)

sp2 hybridization

c)

sp3 hybridization

d)

sp3d hybridization

45.

Which geometric molecular shape is shown?

a)

bent

b)

trigonal planar

c)

trigonal pyramidal

d)

tetrahedral

46.

Which of the following metals has the lowest boiling point?

a)

Aluminium

b)

Copper

c)

Potassium

d)

Sodium

47.

The van der waals forces play an important role in influencing the physical properties of

a)

CO2

b)

Mg

c)

NH3

d)

SiO2

48.

The melting point of magnesium is higher than that of sodium because

a)

the relative atomic mass of sodium is less than that of magnesium

b)

the metallic bonding in magnesium is stronger than that in sodium

c)

the atoms in magnesium are packed more closely than the atoms in sodium

d)

the atomic size of magnesium is larger than that of sodium

49.

Element X and Y form the ionic compound, XY. Which of the following are the electronic configurations of X and Y

a)

X : 1s1 ; Y : 1s2 2s2 2p6 3s2 3p5

b)

X : 1s2 2s2 2p6 3s1 ; Y : 1s2 2s2 2p6 3s2 3p4

c)

X : 1s2 2s2 2p5 ; Y : 1s2 2s2 2p6 3s2 3p5

d)

X : 1s2 2s2 2p5 3s2 ; Y : 1s2 2s2 2p6 3s2 3p4

50.

Which combination of elements will form an ionic bond?

a)

Boron-chlorine

b)

Carbon-flourine

c)

Lithium-oxygen

d)

Phosphorus-oxygen

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