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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why BeH2 is polymerases? |
| Answer» | |
| 2. |
Please can you tell me what is the oxidation number of phosphorus in PH3 with reason. |
| Answer» x+3=0,x=-3 where x is phosphorus | |
| 3. |
What is the another name of half reaction method |
| Answer» Electron ion method | |
| 4. |
What is adiabatic process |
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Answer» adiabatic process is that process in which there is no exchange of heat between system and surrounding. Adiabatic process is the process where matter and heat cannot exchange between the system and surrounding but in this system work can be done by /on the system |
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| 5. |
What is the base metal chromite type catalys. Explain how it is used |
| Answer» | |
| 6. |
Why does d- block orbital doesnt follow octet rule? |
| Answer» because d block have different properties and are very far from noble gas elements . | |
| 7. |
Molecular weight CH3COOh |
| Answer» 60 | |
| 8. |
Why potassium is lighter than sodium |
| Answer» its density is less than sodium (due to abnormal increase in size) so,it is lighter than sodium | |
| 9. |
What is first ionisation enthalpies |
| Answer» | |
| 10. |
Why sodium forms peroxide and potassium forms superoxide when reacted in excess of oxygen ? |
| Answer» Because of ther reactivity and superoxide are paramagnetic due to unpaired electron | |
| 11. |
Why the B-F Bond length in BF3 and BF 4- differ |
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Answer» BF3 has sp2 hybridisation and BF4- has sp3.thats why different In bf3 boron is attracted by 3 fluorines but in bf4 boron is attracted by 4 fluorines that why bond lenvth differs |
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| 12. |
Blue print 2017 -2018 |
| Answer» | |
| 13. |
Sir please tell me some important topics in chemistry after 11th helping in 12 class |
| Answer» Hydrocarbon ,organic chemistry,chemical bonding and structure and theory of an atom etc. are very important and rest are not very important . | |
| 14. |
Are there no solutions available on this app for the given sample papers |
| Answer» | |
| 15. |
What is meant by smells law |
| Answer» | |
| 16. |
What is I meet pair effect |
| Answer» Reluctance of s electrons to participate in bonding | |
| 17. |
why does a real crystal has more entropy than an idea l crystal |
| Answer» | |
| 18. |
why it is necessary to define the standard state |
| Answer» | |
| 19. |
what is perpetual motion machine is it possible |
| Answer» | |
| 20. |
What is the ph of the solution which concentration is10-3 |
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Answer» The pH is defined as negative logarithm of conc. of H+ ions. Taking the negative log of 10-3 gives the pH as 3PS- I supposed the given conc. is that of H+ ions. Neutral |
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| 21. |
What will be the mass of one atom C-12 in grams. |
| Answer» Mass of one C-12 atom= 12 uSince, 1 u = 1.67×10^-24 gSo, mass in grams = 12×1.67×10^-24 g= 20.04 × 10^-24g | |
| 22. |
Mention two important ores of boron |
| Answer» | |
| 23. |
Reactions to show acidic nature of alkynes |
| Answer» | |
| 24. |
Why PbCl4 is less stable than SnCl4 |
| Answer» Because due to inert pair effect,Pb tends to have oxidation state of+2.Thus,PbCl2 is its more stable compound. | |
| 25. |
Sodium benzoate in heated with soda lime |
| Answer» | |
| 26. |
What happen when 2 methyel propen1all heated with sulphuric acid at 443kelvin temperature? |
| Answer» | |
| 27. |
Electrochemical |
| Answer» | |
| 28. |
Hi my question is how dipole moment cancel each other |
| Answer» By resolving their vectors. | |
| 29. |
The IUPAC name for isobutyl chloride is :- |
| Answer» 1 chloro 2 methyl propane | |
| 30. |
Arrange the elements of second row in order of increasing second ionisation enthalpies. |
| Answer» Ra→Ba→Sc→Ca→Mg→Be | |
| 31. |
Hetrolytic fission using carve arrow notation of |
| Answer» | |
| 32. |
Pb has higher ionisation energy than sn.why? |
| Answer» Due presence of lanthnoides or due to lanthnoide contraction | |
| 33. |
Which of the following ions has a pink and green in colour? |
| Answer» Mn2+ pink | |
| 34. |
Define formation of precipitate |
| Answer» | |
| 35. |
Why O ^-2 is bigger than F^- |
| Answer» | |
| 36. |
Amphoterric nature of water |
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Answer» Water behave both acid as well as base on reacting other element certain conditions It acts both as acid and base |
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| 37. |
What is enthalpy of hydration? |
| Answer» | |
| 38. |
Amphoteri nature of water? |
| Answer» | |
| 39. |
How many bonds are present in carbon dioxide |
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Answer» 4 Three (3) |
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| 40. |
K2co3 cannot be prepared by solvay\'s method |
| Answer» Becoz it is highly soluble in water it can not seprate as solid | |
| 41. |
Write the rules for naming the organic compound with example.plzz rply fast sr plzz very urgently. |
| Answer» | |
| 42. |
Hybridisation of HCLO4 |
| Answer» Sp3 | |
| 43. |
Why is gallium smaller in size than aluminium |
| Answer» Because galluim has electron of d orbital which have poor screening effect due to which it\'s size decreases . so ,gallium has small size as compare to alluminium | |
| 44. |
Exceptional oxidation state of Br , Co, Cr (redox reaction) |
| Answer» | |
| 45. |
How many elements in periodic table. |
| Answer» 118 elements | |
| 46. |
Say important question in s& p block lesson |
| Answer» From s block solvay process and from p block inert pair effect are very important... just dont miss them | |
| 47. |
Inert pair effect |
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Answer» The Inertness or tenancy to not participate in bonding of electron pair of s-orbitals The occurrence of oxidation state is two unit less than the group of another oxidation state is somtimes attribute to the inert pair effect |
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| 48. |
What is justice gap? |
| Answer» | |
| 49. |
Explain borax bead test?? |
| Answer» Na2B4O7.10H2O is heated to form Na2B4O7 and then heated it form 2NaBO2 + B2O3 | |
| 50. |
Highper conjugations define |
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Answer» Simply said non bonding resonance Hyperconjugation is the stabilising interaction that results from the interaction of the electrons in a σ-bond (usually C-H or C-C) with an adjacent empty or partially filled p-orbital or a π-orbital to give an extended molecular orbital that increases the stability of the system. |
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