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Chemical Bonding - Main Group - Periodic Properties - Chemistry MCQ


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30 Questions MCQ Test Mock Test Series for IIT JAM Chemistry - Chemical Bonding - Main Group - Periodic Properties

Chemical Bonding - Main Group - Periodic Properties for Chemistry 2024 is part of Mock Test Series for IIT JAM Chemistry preparation. The Chemical Bonding - Main Group - Periodic Properties questions and answers have been prepared according to the Chemistry exam syllabus.The Chemical Bonding - Main Group - Periodic Properties MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Chemical Bonding - Main Group - Periodic Properties below.
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Chemical Bonding - Main Group - Periodic Properties - Question 1

The inter-nuclear distance in O—O bonds for  respectively are:           

Chemical Bonding - Main Group - Periodic Properties - Question 2

Arrange the following compounds in their C—H bond length:           
(I) CH3F      (II) CH2F2       (III) CHF3           

Detailed Solution for Chemical Bonding - Main Group - Periodic Properties - Question 2

The correct order for C-H bond length for CH3F, CH2F2, and CHF3 is CHF3, CH2F2, and CH3F.  
C-F bond length: The C-F bond length decreases in the order CH3F > CH2F2 > CHF3.

Electronegativity: Fluorine is the most electronegative element and it occupies the orbital that has less s-character. This increases the s character in the CH bond. Greater the s character, smaller the bond length.

Orbital contraction: More the electronegative atom attached to C atom more the orbital contraction more the shortening of other bonds between that carbon atom and other atom.

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Chemical Bonding - Main Group - Periodic Properties - Question 3

Arrange the following species in increasing order of stability:           
Li2, Li2+, Li2               

Detailed Solution for Chemical Bonding - Main Group - Periodic Properties - Question 3

The order of stability of the species Li2, Li2+, and Li2- is Li2 > Li2+ > Li2-. This is because the bond order of a molecule is directly proportional to its stability. Li2 has a bond order of 1, Li2+ has a bond order of 0.5, and Li2- has a bond order of 0.5. Therefore, Li2 is the most stable, followed by Li2+ and Li2-.

Chemical Bonding - Main Group - Periodic Properties - Question 4

Which of the following is correct structure of S2Cl2?  

Chemical Bonding - Main Group - Periodic Properties - Question 5

Elements X and Y have valence shell electronic configuration as: 
X: ns2np5  ,  Y: ns2np3
Which compound is likely to be formed?           

Detailed Solution for Chemical Bonding - Main Group - Periodic Properties - Question 5

According to the octet rule, elements tend to form bonds with each other in such a way that each of the elements get 8 valence electrons. Here, X has 7 valence electrons and Y has 5 valence electrons. Covalent compounds are most likely to be formed where sharing of electrons takes place here. Each X atom shares one electron with Y, so Y is surrounded by three X atoms and we get YX3.

Chemical Bonding - Main Group - Periodic Properties - Question 6

M+3 has electronic configuration as [Ar]3d104s2, hence it lies in following block:           

Detailed Solution for Chemical Bonding - Main Group - Periodic Properties - Question 6

Chemical Bonding - Main Group - Periodic Properties - Question 7

Pick out the property which is not shown by transition metals:           

Chemical Bonding - Main Group - Periodic Properties - Question 8

When is the Intramolecular hydrogen bond formed?

Detailed Solution for Chemical Bonding - Main Group - Periodic Properties - Question 8

When a hydrogen atom is in between the two highly electronegative atoms.

  • There are two types of H bond and they are as follows:
    • Intramolecular hydrogen bond.
    • Intermolecular hydrogen bond.
  • Intramolecular hydrogen bond:
    • It is formed when a hydrogen atom is in between the two highly electronegative (F, O, N) atoms present within the same molecule. For example, in o-nitrophenol, the hydrogen is in between the two oxygen atoms.
  • Intermolecular hydrogen bond:
    • It is formed between two different molecules of the same or different compounds. For example, H-bond in case of HF molecule, alcohol or water molecules, etc
      Hence option A is correct.
Chemical Bonding - Main Group - Periodic Properties - Question 9

Which among the following is both a molecule and a compound?       

Detailed Solution for Chemical Bonding - Main Group - Periodic Properties - Question 9

H2O is both a molecule and a compound. This is because the atoms which make them are not the same.

Chemical Bonding - Main Group - Periodic Properties - Question 10

Standard reduction potentials in acidic medium for F2, Cl2, Na, Zn are in the order:           

Chemical Bonding - Main Group - Periodic Properties - Question 11

Consider the compounds PF5, SbF5, PH3 and SbH3. The strongest acid and strongest base among these are resp:           

Chemical Bonding - Main Group - Periodic Properties - Question 12

Among SiCl4, P(O)Cl3, NF3, trans-[SnCl4(py)2] (py = pyridine), those with zero dipole moments are:

Chemical Bonding - Main Group - Periodic Properties - Question 13

The nodal plane in the π-bond of ethene is located in:           

Chemical Bonding - Main Group - Periodic Properties - Question 14

Ionic hydrides reacts with water to give           

Chemical Bonding - Main Group - Periodic Properties - Question 15

Consider (I) I-, (II) Se2-, (III) Br, (IV) O2-, (V) F- and arrange them in decreasing order of ionic radius.           

Chemical Bonding - Main Group - Periodic Properties - Question 16

Which pair is different from others?

Chemical Bonding - Main Group - Periodic Properties - Question 17

The d-bond is formed via the overlap of (considering z-axis as the inter-nuclear axis):           

Chemical Bonding - Main Group - Periodic Properties - Question 18

First, Second and Third ionization energy values are 100 eV, 150 eV and 1500 eV. Element can be?  

Chemical Bonding - Main Group - Periodic Properties - Question 19

Which of the following compunds is not formed by all alkali metals?

Detailed Solution for Chemical Bonding - Main Group - Periodic Properties - Question 19

All alkali metals form hydrides, hydroxides and amide but metals like Li and Na do not from superoxide MO2.

Chemical Bonding - Main Group - Periodic Properties - Question 20

Least acidic tri-halide is?

Chemical Bonding - Main Group - Periodic Properties - Question 21

What are the hydrolysis products of calcium carbide?           

Chemical Bonding - Main Group - Periodic Properties - Question 22

Noble gases (like He, Ne, Ar, Kr etc) are isolated from air. One of the steps is/are           

Chemical Bonding - Main Group - Periodic Properties - Question 23

To an acidified dichromate solution, a pinch of Na2O2 and ether is added and shaken. What is the observation?           

Chemical Bonding - Main Group - Periodic Properties - Question 24

The reason for the chemical inertness of gaseous nitrogen at room temperature is best given by its:           

Chemical Bonding - Main Group - Periodic Properties - Question 25

The correct increasing order of melting points of the following is:           

Chemical Bonding - Main Group - Periodic Properties - Question 26

Which reaction lead to adduct formation:           

Chemical Bonding - Main Group - Periodic Properties - Question 27

Which represents Alkali metals based on IE1and IE2 values?                        
   

Chemical Bonding - Main Group - Periodic Properties - Question 28

Ionic radii are:           

Chemical Bonding - Main Group - Periodic Properties - Question 29

Which has maximum stability?           

Chemical Bonding - Main Group - Periodic Properties - Question 30

Which is best oxidizing agent?           

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