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Class 9 Exam  >  Class 9 Tests  >  Chemical Bonding And Molecular Structure Practice Test (1) - Class 9 MCQ

Chemical Bonding And Molecular Structure Practice Test (1) - Class 9 MCQ


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25 Questions MCQ Test - Chemical Bonding And Molecular Structure Practice Test (1)

Chemical Bonding And Molecular Structure Practice Test (1) for Class 9 2024 is part of Class 9 preparation. The Chemical Bonding And Molecular Structure Practice Test (1) questions and answers have been prepared according to the Class 9 exam syllabus.The Chemical Bonding And Molecular Structure Practice Test (1) MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Chemical Bonding And Molecular Structure Practice Test (1) below.
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Chemical Bonding And Molecular Structure Practice Test (1) - Question 1
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Octet of electrons, represents a particularly stable electronic arrangement.. Atoms achieve the stable octet when they are linked by chemical bonds. This rule is associated with one of the following theories

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Lewis theory states that elements in order to get stabalised completes their octet.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 2
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Structures of CO2−3CO32−. ion given below explains the phenomenon of in terms of

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Resonance is the phenomenon when a molecule can be represented by 1 or more structure differing in the position of bonds and charge.

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Chemical Bonding And Molecular Structure Practice Test (1) - Question 3
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The maximum number of hydrogen bonds that a molecule of water can have is

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a molecule of water can form max of 4 Hydrogen bonds.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 4
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For a stable molecule the value of bond order must be
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stable molecule have positive value of bond order.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 5
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Polarity in a molecule and hence the dipole moment depends primarily on electronegativity of the constituent atoms and shape of a molecule. Which of the following has the highest dipole moment?
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Because of presence of lp on head of O atom in H2O therefore it has max dipole moment.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 6
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Inertness of noble gas was observed to be due to their electronic configurations: Choose the most appropriate
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Noble gases have fully filled octet in their valence shell.​

Chemical Bonding And Molecular Structure Practice Test (1) - Question 7
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The product of the magnitude of the charge and the distance between the centres of positive and negative charge.
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µ=q x r

Chemical Bonding And Molecular Structure Practice Test (1) - Question 8
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During the formation of a chemical bond
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chemical bond formation leads to stability in system hence energy decreases.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 9
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In acetylene molecule, between the carbon atoms there are
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acetylene is C2H2 C atoms are bound with triple bond i.e. 1 sigma and 2 pie bonds.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 10
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The types of hybrid orbitals of nitrogen in No+2, No−3 and NH+4 respectively are expected to be
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hybridization of N in No2+, No3− and NH4+ respectively are sp, sp3and sp2

Chemical Bonding And Molecular Structure Practice Test (1) - Question 11
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Stable outer octet of electrons is achieved in chlorine atom during the formation of NaCl by:
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Na lose its one electron forming Na+ while Cl gains the electron formimg Cl- .​

Chemical Bonding And Molecular Structure Practice Test (1) - Question 12
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the valence shell electron pair repulsion (vsepr) theory helps in the
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VSPER helps in predicting the geometrical shapes of molecules.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 13
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Which of the following has maximum number of lone pairs associated with Xe?

 
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XeF2 will have 2 bp while 3 lps.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 14
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In PO3−4  ion the formal charge on the oxygen atom of P–O bond is
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Formal charge on the oxygen atom of P–O bond is – 1

Chemical Bonding And Molecular Structure Practice Test (1) - Question 15
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Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs.
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BF4−andNH+4 both have sp3 hybridisation.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 16
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The bond formed, as a result of the electrostatic attraction between the positive and negative ions was termed as
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electrovalent or ionic bond is nothing but electrostatic force of attraction between positive cation and negative anion.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 17
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In the formation of hydrogen molecule, overlapping of atomic orbitals which results in the pairing of electrons. These are:
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overlapping of atomic orbitals having electrons of opposite spin take palce in the formation of molecule.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 18
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The structure of IF7is

 
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Steric no of IF7 is 7 so geometry and structure is pentagonal bipyramidal.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 19
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In which of the following substances will hydrogen bond be strongest?
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Out of all H2O will form strongest hydrogen bonding due to high electronegativity of O.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 20
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In NO−3 ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are
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In NO3⁻ ion number of bond pair and lone pair of electrons on nitrogen atom respectively are :  4,0.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 21
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The number of dots around the Lewis symbols for the elements represent
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dots reprents the valence electrons.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 22
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In NO−3 ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are
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NO−3 have 3 bps and 0 lps.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 23
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The number of types of bonds between two carbon atoms in calcium carbide is
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CaC2 have one sigma and 2 pie bonds.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 24
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When a gas phase atom in its ground state gains an electron. This is called
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electron gain enthalpy is the energy released when an electron is gained by isolated gaseous atom to form isolated gaseous anion.

Chemical Bonding And Molecular Structure Practice Test (1) - Question 25
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Amongst the following elements whose electronic configurations are given below, the one having the highest ionisation enthalpy is
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A and D both have stable half filled configuration but in A the atomic radii is samller than D so IE of A is highest.

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