Chemical Bonding Test

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Chemical Bonding Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Which type of compounds show high melting and boiling points

A
Electrovalent compounds

B
Covalent compounds

C
Coordinate compounds

D
All the three types of compounds have equal melting and boiling points

Solution

Melting point and boiling point of electrovalent compounds are high due to strong electrostatic force of attraction between the ions.
Question 2
1 / -0

Lattice energy of an ionic compound depends upon

A
Charge on the ion only

B
Size of the ion only

C
Packing of ions only

D
Charge on the ion and size of the ion

Solution

The value of lattice energy depends on the charges present on the two ions and distance between them. It shell be high if charges are high and ionic radii are small.
Question 3
1 / -0

In the given bonds which one is most ionic

A
Cs - Cl

B
Al - Cl

C
C - Cl

D
H - Cl

Solution

Cs is more electropositive.
Question 4
1 / -0

Element x is strongly electropositive and y is strongly electronegative. Both element are univalent, the compounds formed from their combination will be

A
x⁺y^-

B
x^-y⁺

C
x - y

D
x → y

Solution

X loses electron, Y gains it.
Question 5
1 / -0

Which of the following is an electrovalent linkage

A
CH₄

B
MgCl₂

C
SiCl₄

D
BF₃

Solution

MgCl₂ has electrovalent linkage because magnesium is electropositive metal while chlorine is electronegative.
Question 6
1 / -0

Electrovalent compounds do not have

A
High M.P. and Low B.P.

B
High dielectric constant

C
High M.P. and High B.P.

D
High polarity

Solution

Electrovalent compounds generally have high m.pt and high b.pt due to stronger coulombic forces of attractions.
Question 7
1 / -0

Many ionic crystals dissolve in water because

A
Water is an amphiprotic solvent

B
Water is a high boiling liquid

C
The process is accompanied by a positive heat of solution

D
Water decreases the interionic attraction in the crystal lattice due to solvation

Solution

Water is a polar solvent so it decreases the interionic attraction in the crystal lattice due to solvation.
Question 8
1 / -0

The electronic structure of four elements A, B, C, D are

A
1s²

B
1s², 2s²2P²

C
1s2, 2s²2P⁵

D
1s2, 2s²2P⁶

Solution

Element C has electronic structure 1s2, 2s²2P⁵, it requires only one electron to complete its octet and it will form anion so it will form electrovalent bond.
Question 9
1 / -0

Chloride of metal is MCl₂. The formula of its phosphate will be

A
M₂PO₄

B
M₃(PO₄)₂

C
M₂(PO₄)₃

D
MPO₄

Solution

Since the chloride of a metal is MCl₂ therefore metal ‘M’ must be divalent i.e. M²⁺. As a result the formula of its phosphate is M₃(PO₄)₂.

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Re-Attempt Weekly Quiz Competition

Chemical Bonding Test - 2

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Chemical Bonding Test - 2

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Question 1

Electrovalent compounds

Covalent compounds

Coordinate compounds

All the three types of compounds have equal melting and boiling points

Solution

Question 2

Charge on the ion only

Size of the ion only

Packing of ions only

Charge on the ion and size of the ion

Solution

Question 3

Cs - Cl

Al - Cl

C - Cl

H - Cl

Solution

Question 4

x+y-

x-y+

x - y

x → y

Solution

Question 5

CH4

MgCl2

SiCl4

BF3

Solution

Question 6

High M.P. and Low B.P.

High dielectric constant

High M.P. and High B.P.

High polarity

Solution

Question 7

Water is an amphiprotic solvent

Water is a high boiling liquid

The process is accompanied by a positive heat of solution

Water decreases the interionic attraction in the crystal lattice due to solvation

Solution

Question 8

1s2

1s2, 2s22P2

1s2, 2s22P5

1s2, 2s22P6

Solution

Question 9

M2PO4

M3(PO4)2

M2(PO4)3

MPO4

Solution

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x⁺y^-

x^-y⁺

CH₄

MgCl₂

SiCl₄

BF₃

1s²

1s², 2s²2P²

1s2, 2s²2P⁵

1s2, 2s²2P⁶

M₂PO₄

M₃(PO₄)₂

M₂(PO₄)₃

MPO₄