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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. |
Which two elements among the following belongs to the same period Al,Si,Ba,and o? |
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Answer» Al and si belong from 3period Ba nd O |
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| 2. |
Define nuclear spic quantum no.of isotopes of H |
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| 3. |
Why do bOron halides form addition compounds with amine |
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| 4. |
What is meant by Lewis acid |
| Answer» a compound or ionic species which can accept an electron pair from a donor compound. | |
| 5. |
in which hybridization carbon atom in acetylene undergoes |
| Answer» | |
| 6. |
First member of each group in the p- block formed pπ-pπ bonding. Explain |
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Answer» 1group of every member show different behaviour I DON\'T KNOW THIS ONE |
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| 7. |
Write the water gas shift reaction |
| Answer» CO + H2O ---------> CO2 + H2 | |
| 8. |
Write the laboratory method to prepare dihydrogen |
| Answer» It is usually prepared by the reaction of granulated Zinc with dilute hydrochloric acid | |
| 9. |
Justify the position of hydrogen in periodic table on basic of its electronic configuration. |
| Answer» Position of hydrogen with alkali metals Like alkali metals, hydrogen has 1 e- in it\'s valence shell . H- 1s1 ( electronic configuration) Li - ( He) 2s1Na - ( Ne) 3 s1Position with halogen Like halogens, hydrogen has only 1 e- less than the nearest Noble gas configuration . H - 1s1F - ( He) 2s2 2p5 ( e.c) | |
| 10. |
Why we write in s or p orbital 1arrow in up and 2 in down e.,( ^, √) |
| Answer» it is done in every orbital due to Pauli and hund\'s rule | |
| 11. |
Compound bf3 name |
| Answer» Boron trifluoride | |
| 12. |
Difference between contamination and pollution |
| Answer» \tContaminationPollutionDoes not always cause harmOften leads to damageLess associated with environmental issuesCommonly linked with environmental issuesMay not be caused by humansUsually caused by humansGenerally takes the form of substances or organismsIncludes substances and energyLess governed by monitoring regulationsMostly governed by monitoring regulationsMore linked with the intrusion of a foreign substanceMay be due to an already existing substance with an abnormal level or numberInvolved with the transfer of diseasesLess involved with the biological transfer of diseases\t | |
| 13. |
Why there is 8 electrons in third shell? |
| Answer» By 2nsquare rule | |
| 14. |
Define Electromeric effect .???? |
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| 15. |
What is inductive effect |
| Answer» The displacement of charge to staiblised . | |
| 16. |
What is successive ionisation enthalpy |
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| 17. |
What was wanderwall equation |
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| 18. |
Why o3 is an oxidizing agent |
| Answer» Because O3 i.e. ozone can provide oxygen to the compound and can oxidize it. | |
| 19. |
Why lithium does not form superoxide and peroxide? |
| Answer» Ionic and atomic size of lithium is very small and it is less electopositive amongst its group element due to this it will form olny monoxide | |
| 20. |
Find the volume of carbon dioxide produced at STP on heating 40 grams of caco3 |
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| 21. |
How many atoms of Hydrogen and Sulphur are there in 0.8 mole of H2S |
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| 22. |
What is lattice energy.? |
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Answer» The energy released when 1 mole of ionic compound is formed from its constituent ions Energy released when positive and negative charge s combine |
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| 23. |
What is halogenation |
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Answer» Sweet Girl you are wrong.You are talking about hydrogenation. Halogenation is the addition of halogen atom in compound.Halogen atoms are Cl, Br, I ,F. Eg addition of Cl in CH4 reasults in CH3Cl i.e. Chloromethane. Halogenation means adfition of hydrogen on a triple and double bond to make an saturated hydro carbon |
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| 24. |
Lasaignes test is not shown by diazonium salt why |
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| 25. |
What is dead brunt plaster?How it is obtained |
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Answer» Above393k No water of crystallisation is left and Anhydrous Calcium sulphate caso4 formed .this is known as deadburntplaster |
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| 26. |
What is quantitative relationship |
| Answer» | |
| 27. |
why carbon monoxide is neutral? |
| Answer» | |
| 28. |
How to balance the hard equation |
| Answer» Simply by hit and trial mwthod | |
| 29. |
How to perform salt analysis in lab |
| Answer» You can even identify an anion or cation with its smell 2)memorize the colour of cation or anion 3) take the flame test | |
| 30. |
How to perform salt analysis ?? |
| Answer» Awwh salt analysis its very easy jus few simple tst are dere | |
| 31. |
How to calculate strenght of 20 volume solution of hydrogen peroxide |
| Answer» | |
| 32. |
How do symmetry leads to stability |
| Answer» due to spinning of electrons which occur maximize or minimum | |
| 33. |
What is hund’s rule of maximum multiplicity |
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Answer» According to the hund\'s rule pairing of electrons will not take place until or unless each orbital is singly filled with same spin. Sorry I have wrongly posted aufbau principle in hund\'s rule question... According to hund\'s rule a electron Will enter to subshell having lower energy first and then to subshell having higher energy . |
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| 34. |
Carbon dioxide is a gas while sio2 is a solid why? |
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| 35. |
Be and Mg do not give colour in flame whereas the other alkali metals do show |
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| 36. |
Define hyper conjugation ? |
| Answer» Hyperconjugation effect:\xa0It is an extension of resonance effect, as it involves delocalization of sigma electrons of C-H bond of an alkyl group directly attached to an atom of unsaturated system or an atom with an unshared p orbital.The inductive effect of alkyl group is reversed when attached to an unsaturated system such as double bonds or benzene rings. This change in the behaviour is called as hyperconjugation effect.The order of I- effect in alkyl gr. of a saturated system is ; (CH3)3 C-> (CH3)2 CH- > CH3CH2- > CH3 -This order is reversed in unsaturated system due to hyperconjugation effect. The effect works as;Here structure 1, 2 and 3 are called as hyperconjugative structures.It is also shown that, the hyperconjugation depends on no. of alfa H atoms, and so as much is the hydrogen atoms that much will be the hyperconjugative structures. | |
| 37. |
What is fractional distillation under reduced pressure |
| Answer» | |
| 38. |
Define hyperconjugation |
| Answer» Positive charge on carbon of carbocation get dispersed to the adjacent hydrogen showing resonance without any bond known as hyperconjugation | |
| 39. |
What is meant by stock notation |
| Answer» a system in chemical nomenclature and notation of indicating the oxidation state of the significant element in a compound or ion by means of a Roman numeral that is used in parentheses after the name or part of the name designating this element and ending invariably in -ate in the case of an anion and that is placed above and to the right of the symbol for this element according to the Stock system nitrous oxide is named nitrogen (I) oxide, | |
| 40. |
Purifications of water |
| Answer» | |
| 41. |
What is quantom no. Theory |
| Answer» Q no. Is set of 4 no.that give all infomation about electron | |
| 42. |
What is quantom number theory |
| Answer» | |
| 43. |
Draw the structure of H2O2 solid and gase state |
| Answer» H/O-O/H | |
| 44. |
Do 2-propyl heptane compound exist? |
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| 45. |
What are covalent hydrids |
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| 46. |
I want practical of salt |
| Answer» | |
| 47. |
What is bond parameter? How to find it? |
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| 48. |
How does basic character of oxide and hydroxide down the group in alkali metals changes |
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| 49. |
Anti log of 1.59??? |
| Answer» | |
| 50. |
H2o me hybridaijaction |
| Answer» sp3 | |