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JEE-Main - Grade 12 - Chemistry - Coordination Compounds - Introduction and Snapshot of Coordination Compounds - Study ref# 875
Introduction: In the previous Unit we learnt that the transition metals form a large number of complex compounds in which the metal atoms are bound to a number of anions or neutral molecules. In modern terminology such compounds are ca...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Importance and Snapshot of Chemical Bonding And Molecular Structure - Study ref# 659
Introduction: Matter is made up of one or different type of elements. Under normal conditions no other element exists as an independent atom in nature, except noble gases. However, a group of atoms is found to exist together as one spe...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Importance and Snapshot of Chemical Bonding And Molecular Structure - Study ref# 660
Following sections must be covered to understand Chemical Bonding And Molecular Structure: 1. Kossel-Lewis Approach to Chemical Bonding. 2. Ionic or Electrovalent Bond 3. Bond Parameters 4. The Valence Shell Electron Pair Repulsion(...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Target Setup for Basic Chemical Bonding And Molecular Structure - Study ref# 661
Student requires to achieve the following milestones to get better grip over Chemical Bonding And Molecular structure. The milestones / targets are as follows:-Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Tes...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1319
Explain the formation of chemical bond. Answer: Kossel and Lewis approach to chemical bonding was based on the inertness of noble gases. Inertness of noble gases is due to the presence of 8 electrons in their outermost shell (called octet) exce...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1320
Write the Lewis structure for the following atoms and ions S and S-2; Al and Al3+; H and H-. Answer: Lewis symbol= Lewis symbol= Lewis symbol= electrons; Lewis s...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1321
Write the favourable factors for the formation of ionic bond. Answer: The favourable conditions for forming stable ionic bond are (i) Low ionization enthalpy of element forming cation. (ii) More negative electron gain enthalpy of elemen...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1322
Discuss the shape of the following molecules using the VSEPR model. BeCl2, BCl3, SiCl4, AsF5,H2S,PH3 Answer: According to VSEPR theory, the shape of a molecule depends upon the number of valence shell electron pairs (bonded or non-bonde...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1323
Explain the important aspects of resonance with reference to the ion. Answer: When a single Lewis structure of a molecule cannot describe its all properties, a number of structures, called canonical structures, are written. The actual s...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1324
Write the resonance structures for SO3, NO2 and. Answer: Sulphur trioxide, SO3 Nitrogen dioxide,NO2 Nitrate ion, NO-3 Hints: Draw the possible structures in which octet (duplet in case of H) ...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1325
Apart from tetrahedral geometry, another possible geometry for CH4 is square planar with the four H-atoms at the corners of the square and the C atom at its centre. Explain, why CH4 is not square planar? Answer: Electronic configuration of c...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1326
What is meant by hybridization of atomic orbitals? Describe the shape of sp,sp2 and sp3 hybrid orbitals. Answer: Hybridization To explain the shape of polyatomic molecules like CH4,H2O, etc., Pauling introduced the concept of hybridization. ...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1327
Draw diagrams showing the formation of a double bond and a triple bond between the carbon atoms in C2H4 and C2H2. Answer: Formation of C2H4(ethylene) ...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1328
Use molecular orbital theory to explain why the Be2 molecule does not exist? Answer: Electronic configuration of 4Be- 1s2,2s2 Electronic configuration of Be2 molecule (4+4=8),
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1329
Why does the type of overlap given in the following in the following figure not result in bond formation? Answer: In the figure (I) area of ++ overlap is equal to +- overlap, so net overlap is zero, while in figure II there is no overlap du...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1330
In both water and dimethyl ether
, oxygen atom is central atom, and has the same hybridization, yet they have different bond angles. Which one has the greater bond angle? Give reason. Answer...
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1331
Group the given molecules as linear and non-linear molecules. H2O,HOCl,BeCl2,Cl2O Answer: Therefore, only BeCl2 is linear and rest of the molecules are non-linear....
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JEE-Main - Grade 11 - Chemistry - Chemical Bonding and Molecular Structure - Study ref# 1332
(i) X,Y and Z elements have 4,5 and 7 valence electrons. Draw the structure of XH4,YH5,YH3 and H−Z. (ii) Which of these compounds has the highest dipole moment? Answer: (ii) Z has seven electrons in its valence shell. It is the ...
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