Chemical Bonds Test 3

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:Electrovalent compound's

Answers Choices:

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

Answers Choices:

\({M_2}P{O_4}\)

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

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

\(MP{O_4}\)

Questions 3 of 50

Question:Which of the following compound has electrovalent linkage

Answers Choices:

\(C{H_3}Cl\)

\(NaCl\)

\(C{H_4}\)

\(C{l_2}\)

Questions 4 of 50

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

Answers Choices:

Ionic

Polar covalent

Co-ordinate

Metallic

Questions 5 of 50

Question:The valency of sulphur in sulphuric acid is

Answers Choices:

2

4

6

8

Questions 6 of 50

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

Answers Choices:

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

Answers Choices:

0

3

4

5

Questions 8 of 50

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

Answers Choices:

\({A_2}{B_3}\)

\({A_3}{B_2}\)

\({A_3}{B_3}\)

\({A_2}{B_2}\)

None of these

Questions 9 of 50

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

Answers Choices:

\(Si\)

\(S\)

\(Cl\)

\(P\)

Questions 10 of 50

Question:In the coordinate valency

Answers Choices:

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

Answers Choices:

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

Answers Choices:

7

10

15

27

Questions 13 of 50

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

Answers Choices:

Water

Chloroform

Nitrobenzene

Hexane

Questions 14 of 50

Question:The \(ICl\) molecule is

Answers Choices:

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

Answers Choices:

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

Answers Choices:

\(\frac{1}{4}s - \) 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

Answers Choices:

Tetrahedral

Pyramidal

Octahedral

Square planer

Questions 18 of 50

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

Answers Choices:

\({109^o}28'\)

\({120^o}\)

\({180^o}\)

Different

Questions 19 of 50

Question:s-character in \(sp\)hybridised orbitals are

Answers Choices:

\(\frac{1}{3}\)

\(\frac{1}{2}\)

\(\frac{1}{4}\)

\(\frac{2}{3}\)

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

Answers Choices:

\(s{p^2},\,\,s{p^3}\) 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

Answers Choices:

\(C{H_2} = C{H_2}\)

\(HC \equiv CH\)

\(BeC{l_2}\)

\(C{O_2}\)

Questions 22 of 50

Question:Which of the following is not linear

Answers Choices:

\(C{O_2}\)

\(Cl{O_2}\)

\(I_3^ - \)

None of these

Questions 23 of 50

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

Answers Choices:

\(HF < HCl < HBr < HI\)

\(HI < HBr < HCl < HF\)

\(HF < HBr < HI < HCl\)

\(HF < HI < HBr < HCl\)

Questions 24 of 50

Question:The state of hybridisation of \(B\) in \(BC{l_3}\) is

Answers Choices:

\(sp\)

\(s{p^2}\)

\(s{p^3}\)

\(s{p^2}{d^2}\)

Questions 25 of 50

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

Answers Choices:

\({d_{{x^2} - {y^2}}}\)

\({d_{xy}}\)

\({d_{{z^2}}}\)

\({d_{zx}}\)

Questions 26 of 50

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

Answers Choices:

\(O = C = O\)

\(^ - O - C \equiv {O^ + }\)

\(^ + O \equiv C - {O^ - }\)

\(O \equiv C = O\)

Questions 27 of 50

Question:The shape of \(SO_4^{2 - }\)ion is

Answers Choices:

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

Answers Choices:

\({H_2}O\)

\(N{H_3}\)

\(C{H_4}\)

\(PC{l_5}\)

Questions 29 of 50

Question:The isoelectronic pair is

Answers Choices:

\(C{l_2}O,\;ICl_2^ - \)

\(ICl_2^ - ,Cl{O_2}\;\)

\(IF_2^ + ,\;I_3^ - \)

\(ClO_2^ - ,\;CIF_2^ + \)

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

Answers Choices:

Linear

Tetrahedral

Hexahedral

Octahedral

Questions 31 of 50

Question:Maximum bond angle is present in

Answers Choices:

\(BC{l_3}\)

\(BB{r_3}\)

\(B{F_3}\)

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

Answers Choices:

Tetrahedral

Planar trigonal

Square planar

Pyramidal

Questions 33 of 50

Question:Oxygen molecule is paramagnetic because

Answers Choices:

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

Answers Choices:

\(O_2^ - \)

\(NO\)

Both (1) and (2)

\(C{N^ - }\)

Questions 35 of 50

Question:\(PC{l_5}\) exists but \(NC{l_5}\)does not because

Answers Choices:

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

Answers Choices:

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

Answers Choices:

Zero

One

Two

Three

Questions 38 of 50

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

Answers Choices:

Ferromagnetism

Diamagnetism

Paramagnetism

None of these

Questions 39 of 50

Question:Which of the following species would be expected paramagnetic

Answers Choices:

Copper crystals

\(C{u^ + }\)

\(C{u^{ + + }}\)

\({H_2}\)

Questions 40 of 50

Question:Which of the following is correct for \({N_2}\) triple bond

Answers Choices:

3s

1p, 2s

2p, 1s

3p

Questions 41 of 50

Question:Which of the following is diamagnetic

Answers Choices:

Oxygen molecule

Boron molecule

\(N_2^ + \)

None

Questions 42 of 50

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

Answers Choices:

\(N{O^ - } > NO > N{O^ + }\)

\(NO > N{O^ - } > N{O^ + }\)

\(N{O^ + } > NO > N{O^ - }\)

\(N{O^ + } > N{O^ - } > NO\)

Questions 43 of 50

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

Answers Choices:

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

Answers Choices:

\(SO_4^{2 - }\)

\(C{H_4}\)

\({H_2}O\)

\(C{O_2}\)

Questions 45 of 50

Question:The relatively high boiling point of \(HF\)is due to

Answers Choices:

Hydrogen bonding

Covalent bonding

Unshared electron pair on \(F\)

Being a halogen acid

Questions 46 of 50

Question:Water is liquid due to

Answers Choices:

Hydrogen bonding

Covalent bond

Ionic bond

Vander Waals forces

Questions 47 of 50

Question:Which of the following shows hydrogen bonding

Answers Choices:

\(N{H_3}\)

P

As

Sb

Questions 48 of 50

Question:The boiling point of a compound is raised by

Answers Choices:

Intramolecular hydrogen bonding

Intermolecular hydrogen bonding

Covalent bonding

Ionic covalent

Questions 49 of 50

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

Answers Choices:

Ionic bonds

Hydrogen bonds

Vander Waals forces

Hydrophobic forces

Questions 50 of 50

Question:Chemical bond implies

Answers Choices:

Attraction

Repulsion

Neither attraction nor repulsion

Both (1) and (2)