# Chemical Bonds Test 3

Total Questions:50 Total Time: 60 Min

Remaining:

## Questions 1 of 50

Question:Electrovalent compound's

Melting points are low

Boiling points are low

Conduct current in fused state

Insoluble in polar solvent

## Questions 2 of 50

Question:Chloride of metal is $$MC{l_2}$$. The formula of its phosphate will be

$${M_2}P{O_4}$$

$${M_3}{\left( {P{O_4}} \right)_2}$$

$${M_2}{\left( {P{O_4}} \right)_3}$$

$$MP{O_4}$$

## Questions 3 of 50

Question:Which of the following compound has electrovalent linkage

$$C{H_3}Cl$$

$$NaCl$$

$$C{H_4}$$

$$C{l_2}$$

## Questions 4 of 50

Question:Two element have electronegativity of 1.2 and 3.0. Bond formed between them would be

Ionic

Polar covalent

Co-ordinate

Metallic

## Questions 5 of 50

Question:The valency of sulphur in sulphuric acid is

2

4

6

8

## Questions 6 of 50

Question:A bond with maximum covalent character between non-metallic elements is formed

Between identical atoms

Between chemically similar atoms

Between atoms of widely different electronegativities

Between atoms of the same size

## Questions 7 of 50

Question:The covalency of nitrogen in $$HN{O_3}$$ Is

0

3

4

5

## Questions 8 of 50

Question:The valency of $$A = 3$$ and $$B = 2$$, then the compound is

$${A_2}{B_3}$$

$${A_3}{B_2}$$

$${A_3}{B_3}$$

$${A_2}{B_2}$$

None of these

## Questions 9 of 50

Question:The following element forms a molecule with eight its own weight atoms

$$Si$$

$$S$$

$$Cl$$

$$P$$

## Questions 10 of 50

Question:In the coordinate valency

Electrons are equally shared by the atoms

Electrons of one atom are shared with two atoms

Hydrogen bond is formed

None of the above

## Questions 11 of 50

Question:Which of the following compounds possesses the dipole moment

Water

Boron trifluoride

Benzene

Carbon tetrachloride

## Questions 12 of 50

Question:The dipole moment of HBr is $$1.6 \times {10^{ - 30}}$$cm and interatomic spacing is 1Ã…. The % ionic character of HBr is

7

10

15

27

## Questions 13 of 50

Question:Which of the following liquids is not deflected by a non-uniform electrostatic field

Water

Chloroform

Nitrobenzene

Hexane

## Questions 14 of 50

Question:The $$ICl$$ molecule is

Purely electrovalent

Purely covalent

Polar with negative end on iodine

Polar with negative end on chlorine

## Questions 15 of 50

Question:In a sigma bond

Sidewise as well as end to end overlap of orbitals take place

Sidewise overlap of orbitals takes place

End to end overlap of orbitals takes place

None of the above

## Questions 16 of 50

Question:A $$s{p^3}$$ hybridized orbital contains

$$\frac{1}{4}s -$$ character

r$$\frac{1}{2}s -$$character

$$\frac{2}{3}s -$$character

$$\frac{3}{4}s -$$character

## Questions 17 of 50

Question:Shape of methane molecule is

Tetrahedral

Pyramidal

Octahedral

Square planer

## Questions 18 of 50

Question:In ethene, the bond angle(s) is/are

$${109^o}28'$$

$${120^o}$$

$${180^o}$$

Different

## Questions 19 of 50

Question:s-character in $$sp$$hybridised orbitals are

$$\frac{1}{3}$$

$$\frac{1}{2}$$

$$\frac{1}{4}$$

$$\frac{2}{3}$$

## Questions 20 of 50

Question:The hybrid orbitals used by central atoms in $$BeC{l_2},\,\,BC{l_3}$$ and $$CC{l_4}$$ molecules are respectively

$$s{p^2},\,\,s{p^3}$$ and $$sp$$

$$s{p^{}},\,\,s{p^2}$$ and $$s{p^3}$$

$$s{p^2},\,\,s{p^3}$$ and $$s{p^2}$$

$$s{p^2},\,\,sp$$ and $$s{p^3}$$

## Questions 21 of 50

Question:Which compound does not possess linear geometry

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

$$HC \equiv CH$$

$$BeC{l_2}$$

$$C{O_2}$$

## Questions 22 of 50

Question:Which of the following is not linear

$$C{O_2}$$

$$Cl{O_2}$$

$$I_3^ -$$

None of these

## Questions 23 of 50

Question:Arrange the hydra-acids of halogens in increasing order of acidity

$$HF < HCl < HBr < HI$$

$$HI < HBr < HCl < HF$$

$$HF < HBr < HI < HCl$$

$$HF < HI < HBr < HCl$$

## Questions 24 of 50

Question:The state of hybridisation of $$B$$ in $$BC{l_3}$$ is

$$sp$$

$$s{p^2}$$

$$s{p^3}$$

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

## Questions 25 of 50

Question:The d-orbital involved in $$s{p^3}d$$hybridisation is

$${d_{{x^2} - {y^2}}}$$

$${d_{xy}}$$

$${d_{{z^2}}}$$

$${d_{zx}}$$

## Questions 26 of 50

Question:Which one in the following is not the resonance structure of $$C{O_2}$$

$$O = C = O$$

$$^ - O - C \equiv {O^ + }$$

$$^ + O \equiv C - {O^ - }$$

$$O \equiv C = O$$

## Questions 27 of 50

Question:The shape of $$SO_4^{2 - }$$ion is

Square planar

Tetrahedral

Trigonal bipyramidal

Hexagonal

## Questions 28 of 50

Question:Which of the following molecules has one lone pair of electrons on the central atom

$${H_2}O$$

$$N{H_3}$$

$$C{H_4}$$

$$PC{l_5}$$

## Questions 29 of 50

Question:The isoelectronic pair is

$$C{l_2}O,\;ICl_2^ -$$

$$ICl_2^ - ,Cl{O_2}\;$$

$$IF_2^ + ,\;I_3^ -$$

$$ClO_2^ - ,\;CIF_2^ +$$

## Questions 30 of 50

Question:According to VSEPR theory, the most probable shape of the molecule having 4 electron pairs in the outer shell of the central atom is

Linear

Tetrahedral

Hexahedral

Octahedral

## Questions 31 of 50

Question:Maximum bond angle is present in

$$BC{l_3}$$

$$BB{r_3}$$

$$B{F_3}$$

Same for all

## Questions 32 of 50

Question:The shape of a molecule of $$N{H_3}$$, in which central atoms contains lone pair of electron, is

Tetrahedral

Planar trigonal

Square planar

Pyramidal

## Questions 33 of 50

Question:Oxygen molecule is paramagnetic because

Bonding electrons are more than antibonding electrons

Contains unpaired electrons

Bonding electrons are less than antibonding electrons

Bonding electrons are equal to antibonding electrons

## Questions 34 of 50

Question:Which one is paramagnetic from the following

$$O_2^ -$$

$$NO$$

Both (1) and (2)

$$C{N^ - }$$

## Questions 35 of 50

Question:$$PC{l_5}$$ exists but $$NC{l_5}$$does not because

Nitrogen has no vacant d-orbitals

$$NC{l_5}$$is unstable

Nitrogen atom is much smaller

Nitrogen is highly inert

## Questions 36 of 50

Question:Paramagnetism is exhibited by molecules

Not attracted into a magnetic field

Containing only paired electrons

Carrying a positive charge

Containing unpaired electrons

## Questions 37 of 50

Question:The number of nodal planes $$'d'$$ orbital has

Zero

One

Two

Three

## Questions 38 of 50

Question:Atomic number of an element is 26. The element shows

Ferromagnetism

Diamagnetism

Paramagnetism

None of these

## Questions 39 of 50

Question:Which of the following species would be expected paramagnetic

Copper crystals

$$C{u^ + }$$

$$C{u^{ + + }}$$

$${H_2}$$

## Questions 40 of 50

Question:Which of the following is correct for $${N_2}$$ triple bond

3s

1p, 2s

2p, 1s

3p

## Questions 41 of 50

Question:Which of the following is diamagnetic

Oxygen molecule

Boron molecule

$$N_2^ +$$

None

## Questions 42 of 50

Question:Bond energies in $$NO,\,N{O^ + }$$ and $$N{O^ - }$$ are such as

$$N{O^ - } > NO > N{O^ + }$$

$$NO > N{O^ - } > N{O^ + }$$

$$N{O^ + } > NO > N{O^ - }$$

$$N{O^ + } > N{O^ - } > NO$$

## Questions 43 of 50

Question:Contrary to other hydrogen halides, hydrogen fluoride is a liquid because

Size of $$F$$atom is small

$$HF$$is a weak acid

$$HF$$molecule are hydrogen bonded

Fluorine is highly reactive

## Questions 44 of 50

Question:In the following which species does not contain $$s{p^3}$$ hybridization

$$SO_4^{2 - }$$

$$C{H_4}$$

$${H_2}O$$

$$C{O_2}$$

## Questions 45 of 50

Question:The relatively high boiling point of $$HF$$is due to

Hydrogen bonding

Covalent bonding

Unshared electron pair on $$F$$

Being a halogen acid

## Questions 46 of 50

Question:Water is liquid due to

Hydrogen bonding

Covalent bond

Ionic bond

Vander Waals forces

## Questions 47 of 50

Question:Which of the following shows hydrogen bonding

$$N{H_3}$$

P

As

Sb

## Questions 48 of 50

Question:The boiling point of a compound is raised by

Intramolecular hydrogen bonding

Intermolecular hydrogen bonding

Covalent bonding

Ionic covalent

## Questions 49 of 50

Question:In solid argon, the atoms are held together by

Ionic bonds

Hydrogen bonds

Vander Waals forces

Hydrophobic forces

## Questions 50 of 50

Question:Chemical bond implies