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. |
Write the molecular formula of 2nd and 3rd member of homologous series whose 1 member is methane |
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Answer» Hola User________________ |
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| 2. |
Write the expression for de broglie wavelength of a particle |
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Answer» (lamba) WAVELENGTH = h/mv |
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| 3. |
Write the chemical equation for formation of an ester from absolute ethanol and glacial acetic acid |
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Answer» |
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| 4. |
Write chemical equation for the reaction taking place when sodium metal falls into a singh containing water |
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Answer» 2Na+2H2O=2NaOH+H2 |
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| 5. |
Write 1 pial of difference between electrolyte reduction and reduction with carbon give one example each |
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Answer» Carbonyl, CO being a STRONG field LIGAND causes the pairing of up VALENCE electrons in the Ni ATOM against the Hund's Rule of Maximum Multiplicity. This results in the formation of an inner orbital complex, [Ni(CO)4] having diamagnetic character. [Ni(CO)4] has sp3 hybridization. |
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| 6. |
Why sodium chloride becomes yellow when heated in presence of sodium vapour? |
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Answer» Carbonyl, CO being a STRONG field ligand causes the pairing of up VALENCE electrons in the Ni atom against the Hund's Rule of Maximum MULTIPLICITY. This RESULTS in the formation of an INNER orbital complex, [Ni(CO)4] having diamagnetic character. [Ni(CO)4] has sp3 hybridization. |
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| 7. |
You are given a sample of water .how will you find out if it is pure or not |
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Answer» Heya! |
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| 8. |
Why in sublimation process solid directly convert into gas? |
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Answer» It is not directly CONVERTED ...... |
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| 9. |
Potassium citrate and citric acid oral solution usp uses m,alayalam |
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| 10. |
Why haloarenes cannot be prepared from phenol while haloalkanes is? |
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Answer» Aryl halides can't be prepared from PHENOL because of the STRONG BOND between the carbon and oxygen in the phenol molecule. so it is difficult to replace hydroxy group by halogen. |
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| 11. |
Why is helium oxygen mixture preferred over air for respiration in deep sea drilling? |
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Answer» Helium oxygen mixture preferred over air for respiration in DEEP sea drilling this is to REDUCE the narcotic effect. When you are under water you are under pressure due to water above you, how much depends on how deep you dive or drill as well. Helium does not PRODUCE NARCOSIS as compared to NITROGEN when mixture of nitrogen and oxygen is used instead of helium and oxygen. |
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| 12. |
Why bond dissociation energy of isotopes of hydrogen is different? |
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Answer» The ISOTOPES of HYDROGEN are PROTIUM DEUTERIUM and tritanium |
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| 13. |
Why are substances like platinum and palladium often used for carrying out electrolysis of aqueous solution? |
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Answer» Bcoz :- |
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| 14. |
Why alkali metal solutik in liquid ammonia as a giod reducing agent? |
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| 15. |
Why the bond angle of fof in f2o smaller than the bond angle of clocl in cl2o? |
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Answer» The BOND angle of FOF in F2O is smaller than the bond angle in CL2O |
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| 16. |
Why the level of water does not increase when we dissolve sugar in it? |
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Answer» Because the CONCENTRATION of the SUGAR INCREASES but not the VOLUME increases. |
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| 17. |
Which chemical equation for the reaction take place when magnesium ribbon is burnt in a jar containing oxygen? |
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Answer» When Magnesium REACT with OXYGEN to FORM magnesium OXIDE white POWDER |
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| 18. |
Why carbon forms covalent bond in almost all of its compound? |
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Answer» Because CARBON has the ability to SHARE electrons in ALMOST COMPUND. |
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| 19. |
Why pentahalides are more covalent than trihalides in group 15 elements? |
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Answer» The oxidation state of +5 in pentahalides is more as COMPARED to +3 oxidation state in trihalides. Due to the higher POSITIVE oxidation state of central atom in PENTAHALIDE state, these atoms will have larger POLARIZING power than the halogen atom attached to them. |
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| 20. |
Why is the ionisation energy of beryllium greater than that of hi? |
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Answer» The first ionization of BERYLLIUM is greater than that of Boron because beryllium has a stable complete electronic CONFIGURATION(1s2 2S2)so it requires more energy to remove the first electron from it......whereas boron has the electronic configuration(1s2 2s2 3s1)which needs lesser energy than that of beryllium to remove the VALENCE electron. |
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| 21. |
Among carboxylic acid and ketones whose boiling point is higher and why? |
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Answer» CARBOXYLIC acids have higher boling point compared to KETONES because of the intermolecular hydrogen bonding in its MOLECULE hope this HELPS you |
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| 22. |
Why is conversion of ethanol.To.Ethanoic acid oxidation? |
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Answer» Hey.. here's UR answer.. |
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| 23. |
Why aryl halides and vinyl are less reactive than alkyl halides towards nucleophilic substitution? |
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Answer» Aryl HALIDES are less REACTIVE towards nucleophilic substitutionreaction due to several reasons. ... Whereas in ALKYL halides relatively large difference in electronegativity of carbon and halogen is recorded. Thus halogen is EASILY replaced bynucleophile. |
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| 24. |
Which type of bond is formed between nucleophile and electrophile? |
| Answer» TYPICAL electrophiles: A molecule or ion that donates a PAIR of electrons to form a new covalent bond is called a nucleophile (from the Greek for "NUCLEUS LOVING"). A nucleophile is the same thing as a Lewis BASE. Any molecule, ion or atom that has electrons that can be shared can be a nucleophile. | |
| 25. |
Why do we need disodium salt of edta in complexometric titration? |
| Answer» SALSA of THREE TIMES first ACIDIC salt basic salt and NEUTRAL salt | |
| 27. |
What is a metathesis reaction |
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Answer» Metathesis reaction, exchange of BONDS between two reacting chemical speciesOlefin metathesis, redistribution of olefinic (ALKENE) bondsAlkane metathesis, REARRANGEMENT of alkanes to PRODUCE longer or shorter alkane speciesAlkyne metathesis, redistribution of ALKYNE chemical bonds |
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| 28. |
Why has carbon the ability to combine with itself in a large structure |
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Answer» Because it SOES not LOSE or gain electron to complete its valence shell. It SHARES the electron in ORDER ro complete its valence shell. |
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| 29. |
For the Reaction, pA + qB -----> Product, the rate law expression is r = K [A]^1 [B]^m, then :-(a) (p + 1) < (1 + m)(b) (p + q) > (1 + m)(c) (p + q) may or may not be equal to (1 + m)(d) (p + q) = (1 + m) |
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Answer» (p + Q) MAY or may not be EQUAL to (1 + m) |
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| 30. |
What is true for mole fraction (a) x |
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Answer» Option a is WRITE because MOLE fraction can not GREATER then 1 |
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| 31. |
Which solution soap give good lather potassium chloride or sodium chloride? |
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Answer» Soaps are sodium SALTS of fatty acids. Addition of sodium chloride reduces the solubility of the soap salts. The soaps precipitate due to a combination of common ion effect and increased IONIC strength. ... In the presence of excess sodium ions the solubility of soap salts is reduced, making the soap less effective. That is why POTASSIUM Chloride is best for soap. |
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| 32. |
Is ethanol and alcohol are same |
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Answer» No................................ |
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| 33. |
Which of these is precious stones is naturally green? |
| Answer» EMERALD and so on.. | |
| 34. |
Which is the strongest acide between sulphuric acid and sulphonic acid? |
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Answer» Here is ur ANSWER |
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| 35. |
Which is required for the removal of ca(hco3)2 in lime soda process:? |
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Answer» ⭐⭐⭐⭐⭐ ANSWER ⭐⭐⭐⭐⭐ |
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| 36. |
Which is more acidic between cloroacetic acid and formic acid basing oninductive? |
| Answer» FORMIC ACID more ACIDIC then CHLORO acitic acid | |
| 37. |
Which element is 13 group and 3 peroid in modern periodic table? |
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Answer» GALLIUM that is GA is the ELEMENT you are REFERRING to. :) |
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| 38. |
Why funnel arrangement is done during preparation of hydrochloric acid |
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Answer» answer; FUNNEL arrangement is done during preparation of hydrochloric ACID (HCL) because hydrochloric acid is a strong acid and its Ph LEVEL is too low it is so REACTIVE and HARMFUL therefore it is arranged in a funnel |
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| 39. |
Meaning of masking in analytical chemistry |
| Answer» MASKING MEANS that PUT MASK during EXPERIMENTS | |
| 40. |
Write any two condition necessary for chemical reactions .Give examples |
| Answer» HEAT and SUITABLE TEMPERATURE | |
| 41. |
Which does not decolourise bromine solutioon in carbon disulphide? |
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Answer» Carbon disulphide is a SATURATED carbon compound and only UNSATURATED hydrocarbons DECOLOURIZE in BROMINE solution |
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| 42. |
Vegan still copper sulphate solution in a silver wrestle but not silver nitrate solution in a copper vessel ly |
| Answer» PLEASE CORRECT your QUESTION. It is not PROPER | |
| 43. |
What is the element that is constituent of water |
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| 44. |
What can be chemical reaction fot the acitvity that heating is necessary for some chemical reaction to occur |
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Answer» ..,..,.,.,.,..,..,.,.., NM,.,.,,m,,MZ, ,.,.,.,.JZ NJ in s him..,.,.,.,..,..,., |
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| 45. |
The slag which floats on the surface of the molten iron generally contains |
| Answer» HOPE it is CORRECT. CLARIFY with UR TEACHER's | |
| 46. |
What is the meaning of retention and inversion in chemistry |
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Answer» RETENTION Retention refers to the process where the configuration of the molecule is retained after the REACTION. Thus the PRODUCT molecule has the same configuration as the reactant molecule. INVERSION Inversion refers to the process where the configuration of the molecules is REVERSED during the course of the reaction. Thus, the product is of the opposite enantiomeric FORM as compared to the reactant. :) |
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| 47. |
Chemical formula for cryolite |
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Answer» FORMULA of cryolite is Na3AlF6 It is also CALLED SODIUM hexafluoroaluminate . I hope it HELPS you.... |
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| 48. |
What is the difference between formula unit mass and molecular massplease fast Clarity is importantIam giving you 50 points |
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Answer» There is a cyclopean DIFFERENCE between molecular mass and formula mass. Molecular mass is the mass of a given molecule or compound but now the clinch here is that it remains neutral despite the presence of zillions of molecules. For ex: Molecular mass of CO2 = 12*1 + 16*2=44. 2.But, now the formula mass is something different. IT IS THE MOLECULAR MASS OF THE WHOLE COMPOUND CONTAINING X NO. OF MOLECULES OF THAT COMPOUND. Let me clarify it with example: LIKE we have to find the formula mass of 10Na2SO4.H2O= 10[23*2+32+16*4+2*1+16*1] = 10*180= 1800. |
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| 49. |
Which two things to form titanium |
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Answer» Titanium is the ninth most ABUNDANT element in the earth's crust and is primarily found in the MINERALS RUTILE (TIO2), ilmenite (FeTiO3) and sphene (CaTiSiO5). Titanium makes up about 0.57% of the earth's crust. ... Pure titaniumoxide is relatively clear and is used to CREATE titania, an artificial gemstone. |
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