# Chemical Bonds Test 4

Total Questions:50 Total Time: 60 Min

Remaining:

## Questions 1 of 50

Question:A electrovalent compound is made up of

### Answers Choices:

Electrically charged molecules

Neutral molecules

Neutral atoms

Electrically charged atoms or group of atoms

## Questions 2 of 50

Question:Electrovalent bond formation depends on

### Answers Choices:

Ionization energy

Electron affinity

Lattice energy

All the three above

## Questions 3 of 50

Question:The phosphate of a metal has the formula $$MP{O_4}$$. The formula of its nitrate will be

### Answers Choices:

$$MN{O_3}$$

$${M_2}{\left( {N{O_3}} \right)_2}$$

$$M{\left( {N{O_3}} \right)_2}$$

$$M{\left( {N{O_3}} \right)_3}$$

## Questions 4 of 50

Question:In the transition of $$Zn$$ atoms to $$Z{n^{ + + }}$$ions there is a decrease in the

### Answers Choices:

Number of valency electrons

Atomic weight

Atomic number

Equivalent weight

## Questions 5 of 50

Question:An ionic compound is generally a

Good electrolyte

Weak electrolyte

Non-electrolyte

Neutral

## Questions 6 of 50

Question:What metals combine with non-metals, the metal atom tends to

### Answers Choices:

Lose electrons

Gain electrons

Remain electrically neutral

None of these

## Questions 7 of 50

Question:Which of the following is least ionic

### Answers Choices:

$${C_2}{H_5}Cl$$

$$KCl$$

$$BaC{l_2}$$

$${C_6}{H_5}{N^ + }{H_3}C{l^ - }$$

## Questions 8 of 50

Question:Which type of bonding exists in $$L{i_2}O$$ and $$Ca{F_2}$$ respectively

### Answers Choices:

Ionic, ionic

Ionic, covalent

Covalent, ionic

Coordinate, ionic

## Questions 9 of 50

Question:The number of electrons involved in the bond formation of $${N_2}$$molecule

2

4

6

10

## Questions 10 of 50

Question:The electronic configuration of four elements are given in brackets $$L\,\left( {1{s^2},\,\,2{s^2}2{p^1}} \right);\,\,M\,\left( {1{s^2},\,\,2{s^2}\,2{p^5}} \right)$$$$Q\,\left( {1{s^2},\,\,2{s^2}\,2{p^6},\,\,3{s^1}} \right);\,\,R\,\left( {1{s^2},\,\,2{s^2}\,2{p^2}} \right)$$ The element that would most readily form a diatomic molecule is

Q

M

R

L

## Questions 11 of 50

Question:Amongst the following covalent bonding is found in

### Answers Choices:

Sodium chloride

Magnesium chloride

Water

Brass

## Questions 12 of 50

Question:Indicate the nature of bonding in diamond

Covalent

Ionic

Coordinate

Hydrogen

## Questions 13 of 50

Question:Hydrogen chloride molecule contains a

### Answers Choices:

Covalent bond

Double bond

Coordinate bond

Electrovalent bond

## Questions 14 of 50

Question:As compared to covalent compounds, electrovalent compounds generally have

### Answers Choices:

Low melting points and low boiling points

Low melting points and high boiling points

High melting points and low boiling points

High melting points and high boiling points

## Questions 15 of 50

Question:The number of electrons shared by each outermost shell of $${N_2}$$ Is

2

3

4

5

## Questions 16 of 50

Question:Which of the following substances when dissolved in water will give a solution that does not conduct electricity

### Answers Choices:

Hydrogen chloride

Potassium hydroxide

Sodium acetate

Urea

## Questions 17 of 50

Question:In $${H_2}{O_2}$$, the two oxygen atoms have

### Answers Choices:

Electrovalent bond

Covalent bond

Coordinate bond

No bond

## Questions 18 of 50

Question:Carbon has a valency of 2 in $$CO$$ and 4 in$$C{O_2}$$ and $$C{H_4}$$. Its valency in acetylene $$\left( {{C_2}{H_2}} \right)$$ Is

1

2

3

4

## Questions 19 of 50

Question:Which of the following contains a coordinate covalent bond

### Answers Choices:

$${N_2}{O_5}$$

$$BaC{l_2}$$

$$HCl$$

$${H_2}O$$

## Questions 20 of 50

Question:A coordinate bond is formed when an atom in a molecule has

### Answers Choices:

Electric charge on it

All its valency electrons shared

A single unshared electron

One or more unshared electron pair

## Questions 21 of 50

Question:Which bond angle $$\theta$$would result in the maximum dipole moment for the triatomic molecule $$YXY$$

### Answers Choices:

$$\theta = {90^o}$$

$$\theta = {120^o}$$

$$\theta = {150^o}$$

$$\theta = {180^o}$$

## Questions 22 of 50

Question:Non-polar solvent is

### Answers Choices:

Dimethyl sulphoxide

Carbon tetrachloride

Ammonia

Ethyl alcohol

## Questions 23 of 50

Question:Which of the following is non-polar

### Answers Choices:

$${H_2}S$$

$$NaCl$$

$$C{l_2}$$

$${H_2}S{O_4}$$

## Questions 24 of 50

Question:Which of the following is a polar compound

### Answers Choices:

HF

HCl

$$HN{O_3}$$

$${H_2}S{O_4}$$

## Questions 25 of 50

Question:The number of sigma and pi bonds in 1-butene-3-yne are

5 sigma and 5 pi

7 sigma and 3 pi

8 sigma and 2 pi

6 sigma and 4 pi

## Questions 26 of 50

Question:Structure of ammonia is

### Answers Choices:

Trigonal

Tetrahedral

Pyramidal

Trigonal pyramidal

## Questions 27 of 50

Question:Which one amongst the following possesses an $$sp$$ hybridized carbon in its structure

### Answers Choices:

$$Ca{I_2}$$

$$C.C{l_2} = C.C{l_2}$$

$$C{H_2} = C = C{H_2}$$

$$C{H_2} = CH - CH = C{H_2}$$

## Questions 28 of 50

Question:Number of shared electrons in between carbon-carbon atoms in ethylene molecule is

2

4

6

3

## Questions 29 of 50

Question:The two types of bonds present in $${B_2}{H_6}$$ are covalent and

### Answers Choices:

Three centre bond

Hydrogen bond

Two centre bond

None of the above

## Questions 30 of 50

Question:The structure of $${H_2}{O_2}$$ is

Planar

Non-planar

Spherical

Linear

## Questions 31 of 50

Question:Which of the following molecule does not show tetrahedral shape

### Answers Choices:

$$CC{l_4}$$

$$SiC{l_4}$$

$$S{F_4}$$

$$C{F_4}$$

## Questions 32 of 50

Question:Which of the following is not tetrahedral

### Answers Choices:

$$SC{l_4}$$

$$SO_4^{2 - }$$

$$Ni{(CO)_4}$$

$$NiCl_4^{2 - }$$

## Questions 33 of 50

Question:Which one has $$s{p^2} -$$hybridization

### Answers Choices:

$$C{O_2}$$

$${N_2}O$$

$$S{O_2}$$

$$CO$$

## Questions 34 of 50

Question:The hybrid state of sulphur in $$S{O_3}$$ molecule is

### Answers Choices:

$$s{p^3}d$$

$$s{p^3}$$

$$s{p^3}{d^2}$$

$$s{p^2}$$

## Questions 35 of 50

Question:Which of the following molecule contains one pair of non-bonding electrons

### Answers Choices:

$$C{H_4}$$

$$N{H_3}$$

$${H_2}O$$

$$HF$$

## Questions 36 of 50

Question:Of the following compounds, the one having a linear structure is

### Answers Choices:

$$N{H_2}$$

$$C{H_4}$$

$${C_2}{H_2}$$

$${H_2}O$$

## Questions 37 of 50

Question:The molecular shapes of $$S{F_4},\,C{F_4}$$ and $$Xe{F_4}$$ are

### Answers Choices:

The same with 2, 0 and 1 lone pairs of electrons on the central atom, respectively

The same with 1, 1 and 1 lone pair of electrons on the central atoms, respectively

Different with 0, 1 and 2 lone pairs of electrons on the central atom, respectively

Different with 1, 0 and 2 lone pairs of electrons on the central atom, respectively

## Questions 38 of 50

Question:The largest bond angle is in

### Answers Choices:

$$As{H_3}$$

$$N{H_3}$$

$${H_2}O$$

$$P{H_3}$$

## Questions 39 of 50

Question:The bond order in $$C{H_3}Cl$$ ion is

1

2

2.5

3

## Questions 40 of 50

Question:Which one of the following is paramagnetic

### Answers Choices:

$${H_2}O$$

$$N{O_2}$$

$$S{O_2}$$

$$C{O_2}$$

## Questions 41 of 50

Question:What is correct sequence of bond order

### Answers Choices:

$$O_2^ + > O_2^ - > {O_2}$$

$$O_2^ + > {O_2} > O_2^ -$$

$${O_2} > O_2^ - > O_2^ +$$

$$O_2^ - > O_2^ + > {O_2}$$

## Questions 42 of 50

Question:In which of the following pairs molecules have bond order three and are isoelectronics

### Answers Choices:

$$C{N^ - }$$, CO

$$N{O^ + },\,\,C{O^ + }$$

$$C{N^ - }$$, $$O_2^ +$$

CO, $$O_2^ +$$

## Questions 43 of 50

Question:Which of the following is paramagnetic

### Answers Choices:

$${B_2}$$

$${C_2}$$

$${N_2}$$

$${F_2}$$

## Questions 44 of 50

Question:As a result of $$sp$$ hybridization, we get

### Answers Choices:

Two mutual perpendicular orbitals

Two orbitals at $${180^o}$$

Four orbitals in tetrahedral directions

Three orbitals in the same plane

## Questions 45 of 50

Question:The maximum possible number of hydrogen bonds in which an $${H_2}O$$ molecule can participate is

1

2

3

4

## Questions 46 of 50

Question:The boiling point of water is exceptionally high because

### Answers Choices:

Water molecule is linear

Water molecule is not linear

There is covalent bond between H and O

Water molecules associate due to hydrogen bonding

## Questions 47 of 50

Question:Which one is the highest melting halide

### Answers Choices:

$$NaCl$$

$$NaBr$$

$$NaF$$

$$NaI$$

## Questions 48 of 50

Question:The enhanced force of cohesion in metals is due to

### Answers Choices:

The covalent linkages between atoms

The electrovalent linkages between atoms

The lack of exchange of valency electrons

The exchange energy of mobile electrons

## Questions 49 of 50

Question:Which of the following statements is true

### Answers Choices:

HF is less polar than HBr

Absolutely pure water does not contain any ions

Chemical bond formation take place when forces of attraction overcome the forces of repulsion

In covalency transference of electron takes place

## Questions 50 of 50

Question:Which of the following statements is true about $$\left[ {Cu\,{{\left( {N{H_3}} \right)}_4}} \right]S{O_4}$$

### Answers Choices:

It has coordinate and covalent bonds

It has only coordinate bonds

It has only electrovalent bonds

It has electrovalent, covalent and coordinate bonds