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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. |
Balance the equation HNO3+Ca(OH)2=Ca(NO3)2+H2O with explainaton |
| Answer» 2HNO3 + Ca(OH)2 = Ca(NO3)2 + 2H2O | |
| 2. |
10 class acids,bases and salts activity 2.11 |
| Answer» TEST the ph values of solutionsthe STRUCTURE of acid and base depends on the number of h+ IONS and OH- ions produced respectivelyExplanation: | |
| 4. |
Write IUPAC name of the following compound: [Delhi 2014(C)] |
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| 7. |
The pKa of acetic acid is ____________ than that of phenol. |
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| 8. |
Formic acid does not undergo HVZ reaction because it does not have ____________ . |
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Answer» Formic Acid does not undergo this reaction because it does not contain alkyl group. Hell-Volhard ZELINSKY Reaction Takes place only when α-hydrogen is presents.Formic acid formula,HCOOH IUPAC Name - Methanoic acid There is no alkyl group (-CH₃)So there is no α-hydrogen in itChlorination, Bromination will only take place at the α-POSITION.But HVZ reaction requires α-hydrogen for the reaction which substitutes a Halide(Cl,Br) in place of a hydrogen.Hell-Volhard Zelinsky Reaction: (HVZ reaction)Carboxylic acid having an α-hydrogen are halogenated at α position on treatment with Chlorine, BROMINE in presence of small amount RED-phosphorous to give α-halocarboxylicacid acids. R-CH₂-COOH +(red phosphorus/X₂) ⇒ R-CH(X)-COOH (X = Cl, Br)Therefore, Finally Formic Acid does not undergo this reaction because it does not contain alkyl group. |
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| 9. |
Benzoate ion is more ____________ than acetate ion. |
| Answer» RESONANCE......is the answer...HOPE THIS HELPS YOU PLZ MARK AS BRAINLIEST ANSWER #ROCKET... | |
| 10. |
Pentan-2-one can be distinguished from pentan-3-one by ____________ test. |
| Answer» MARK AS BRAINLIESTin lab we should do TEST hope u can understandhope u can UNDERSTAND | |
| 11. |
Assertion: The a-hydrogen atom in carbonyl compounds is less acidic. Reason: The anion formed after the loss of a-hydrogen atom is resonance stabilised. [NCERT Exemplar] |
| Answer» MARK AS BRAINLIESTfalse HOPE U can UNDERSTAND | |
| 12. |
Assertion: Aromatic aldehydes and formaldehyde undergo Cannizaro reaction. Reason: Aromatic aldehydes are almost as reactive as formaldehyde. [NCERT Exemplar] |
| Answer» MARK as brainliesttrue HOPE U can UNDERSTAND | |
| 13. |
Assertion: Compounds containing —CHO group are easily oxidised to corresponding carboxylic acids. Reason: Carboxylic acids can be reduced to alcohols by treatment with LiAlH4. [NCERT Exemplar] |
| Answer» MARK as BRAINLIEST Falsehope U can underatand | |
| 14. |
(a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct but reason is wrong statement. (d) Assertion is wrong but reason is correct statement. (e) Assertion and reason both are correct statements but reason is not correct explanation of assertion. 35. Assertion: Formaldehyde is a planar molecule. Reason: It contains sp² hybridised carbon atom. [NCERT Exemplar] |
| Answer» MARK AS BRAINLIESTDhope U can UNDERSTAND | |
| 15. |
13)Whatiscorrosion?Writethecompositionofrust. |
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Answer» The CORROSION is the process where any metal gets REACT to the ACIDS and liquids and other materials in the environment which RESULTS in the formation of a LAYER on metal.The rust is basically the corrosion of iron when iron react with oxygen in environment. the rust is FeO. (chemical formula) |
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| 16. |
a solution of substance 'X' is used for white washing,(a)name the substance'X',(b)what happens when a solution of substance'X' is treated with water?give the reaction |
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Answer» a) The SUBSTANCE'x' is calcium OXIDE , CaO.b) CaO(solid) + H2O(LIQUID) = Ca(OH)2 (aqueous) calcium. water. calcium hydroxide oxide (slaked lime) |
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| 17. |
At vizag in AP which gas leakage is identified and what is its formula? |
| Answer» TION:Also known as ethenylbenzene, vinylbenzene, and phenylethene, STYRENE is an organic COMPOUND with the CHEMICAL formula C6H5CH=CH2.hope it may help youplzz mark my ANSWER as brainliest | |
| 18. |
Gases can be only liquified by a)increasing pressure only b)decreasing temperature onlyc)by increasing pressure and decreasing temperatured)by decreasing pressure only |
| Answer» INCREASING PRESSURE and DECREASING TEMPERATURE | |
| 19. |
A body of mass 2 kg is placed on a horizontalfrictionless surface. If isconnected to one end of aspring whose force constantis 250 N/m. The other end ofthe spring is joined with thewall. A particle of mass0.15kg moving horizontallywith speed v sticks to thebody after collision. If itcompresses the spring by10cm, The velocity of theparticle is |
| Answer» TION:PLEASE ADD me in BRAINLIST please | |
| 20. |
WHITE SOLID GIVES 2 GASES WITH CONC H2SO4-IDENTIFY WHITE SOLID |
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Answer» gexjkjjgferuhvtyuutdchjncszxhuii |
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| 21. |
on which of the following Dobereiners Triad Law is not applicable . Cl,Br,I . Ca,Sr,Ba .F,Cl,Br .Li,Na,K |
| Answer» F,CL BR is the ANSWER.................... | |
| 22. |
Puy Regardingphoto - electriceffectAn eque conven Lens whose locallength is air is 20em is madeup of material whose retractieindex isles. If one of itssurface is slivered & then dippedin to a transparent liq wholer. Iislob In the lig it wirbehave like a1 Cor2D.L3con& Din |
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Answer» d the same APPLIES with |
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| 23. |
2008 dillaghal so letion:-for 1 hr 6 min 46A current of 19.5 A is based for Inthrough dillag Nall solCalculate(a) wt of Hag) producedCB mod of H₂ (8) liberatedat S.TOP₂ (8) liberated(c) of of oleh broduceda vole of als) liberated atEquivalents of O, 18 broduced if cell efficiency is sollI. moles of H ol boodle cede if n = 7 /4(9)|onamount of current given to the call to produced1 & 1.2 lts of oz (8) at STP if n = 0.25.I write the renes) taking place at anode & ceatlode!during electrolyteis.. |
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Answer» plz follow meExplanation:hi plz plz my mom is in my new POST has to hm BHI follows order I have a ONE question and I will yioutewwryui the link for your email find me a great day ahead to me ok I am looking to go to a GOOD TIME and family to yours I have some time |
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| 24. |
Name a popular polyester? |
| Answer» TERYLENE is a POPULAR POLYESTER which is USED in dress materials.HOPE THIS HELPS PLZ MARK AS BRAINLIEST #ROCKET... | |
| 25. |
Name two non-metals showing variable valency |
| Answer» SULPHUR oxygenhope it HELPS YOUMARK it as BRAINLIEST ♥️ ♥️ | |
| 26. |
Explain an activity to show that matter is not continuous,it is particulate in nature? |
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Answer» Matter is CONTINUOUS .EXPLANATION:Spray perfume in one CORNER of the room and go to the other corner, after sometime you can smell the perfume in that corner of the room too. This PROVES that the particles of matter are continuously MOVING. |
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| 27. |
What is meant by exothermic reaction ?give examples |
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Answer» hermic reaction occurs when the temperature of a system increases due to the evolution of heat. This heat is RELEASED into the surroundings, RESULTING in an overall NEGATIVE quantity for the heat of reaction. An example of an exothermic reaction is the MIXTURE of sodium and chlorine to yield table salt |
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| 28. |
Match the reactions given in Column I with the suitable reagents given in Column II. [NCERT Exemplar] |
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Answer» where is COLUMN L and where is column ll ???????# FOLLOW ME BACK |
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| 29. |
Coke is obtained by .........of coal |
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Answer» tion:Coke is obtained by destructive distillation of CHARCOAL or coal in the furnace Destructive distillation is the chemical process involving the decomposition of coal or charcoal by heating to a high TEMPERATURE in the absence of air or in the presence of limited AMOUNTS of oxygenHOPE THIS HELPS YOU¶ THANK YOU ¶PLEASE MARK AS BRAINLIEST~~~^ |
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| 30. |
Which of the following is the correct representation for intermediate of nucleophilic addition reaction to the given carbonyl compound (A): [NCERT Exemplar] |
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| 31. |
Match the acids given in Column I with their correct IUPAC names given in Column II. [NCERT Exemplar] |
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Answer» HCO2H FORMIC ACID methanoic acidCH3CO2H ACETIC acid ethanoic acidCH3CH2CO2H propionic acid propanoic acidCH3(CH2)2CO2H butyric acid BUTANOIC acid |
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| 32. |
Match the common names given in Column I with the IUPAC names given in Column II. [NCERT Exemplar] |
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Answer» tion:Where you're chart I give some COMMON NAMES & IUPAC namesYou can find from it |
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| 33. |
Benzone acid is weaker than ……… but stronger than ……….. (a) p-toluic acid, o-toluic acid (b) p-nitrobenzoic acid, p-toluic acid (c) acetic acid, formic acid (d) fomic acid, acetic acid |
| Answer» B is the CORRECT ithink so | |
| 34. |
(a) 3-Nitrosalicylic acid (b) 3, 5-Dinitrosalicylic acid (c) m-Nitrobenzoic acid (d) Picric acid |
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Answer» (a) 3-Nitrosalicylic ACID(B) 3, 5-Dinitrosalicylic acid(C) m-Nitrobenzoic acid(d) PICRIC acid➡(c) m-Nitrobenzoic acid ✅ |
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| 35. |
The end product (C) in the following reaction sequence is (a) CH3 — CH2 COONa (b) CH2 = CH2 (c) CH3 — CH3 (d) CH2 = CH-COOH |
| Answer» TION:d) CH2=CH-COOH IS RIGHT ANSWER | |
| 36. |
Tert Butyl alcohol can be obtained by treating with CH3MgBr followed by hydrolysis (a) HCHO (b) CH3CHO (c) CH3COCH3 (d) CH3CH2CHO |
| Answer» CH3CHO....... | |
| 37. |
Which of the following will undergo aldol condensation? (a) CH2 = CHCHO (b) CH = CCHO (c) C6H5CHO (d) CH3CH2CHO |
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Answer» CH2=CHCHOhope it HELPS you out and PLEASE MARK me as BRAINLIEST |
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| 38. |
For distinction between pentan-2-one and pentan-3-one, which reagent can be employed? (a) K2Cr2O7/H+ (b) ZnHg/HCl (c) NaOH/I2 (d) AgNO3/NH4OH |
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Answer» The reaction of aldehydes and KETONES with zinc amalgam (Zn/Hg alloy) in concentrated hydrochloric ACID, which reduces the aldehyde or ketone to a hydrocarbon, is called Clemmensen reduction.hope it helps you out and please MARK me as BRAINLIEST |
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| 39. |
Compound ‘A’ C5H10O forms a phenyl hydrazone and gives a negative Tollen’s reagent test and iodoform test. On reduction with Zn+Hg/HCl, compound A gives n-pentane. The compound ‘A’ is (a) Primary alcohol (b) Aldehyde (c) Secondary alcohol (d) Ketone |
| Answer» PRIMARY alchalExplanation:(c)A tiny piece of ORGANIC material taken fromsea was found to have c/c RATIO of0-795 times that in a PLANT living today. The14half-life period of C is 5720 years.Estimate the AGE of the piece. | |
| 40. |
The above chemical reaction represents (a) Rosenmund’s reaction. (b) Cannizaro’s reaction. (c) Kolbe’s reaction, (d) Etard’s reaction. |
| Answer» ZARO's REACTION | |
| 41. |
Calcium metal in ferrous sulphate observation and chemical reaction. |
| Answer» | |
| 42. |
367.5gkclo3 (mol wt 122.5)is heated to produce kcl and o2 find the amount of kcl and o2prosduced |
| Answer» HI the IP address the following INFORMATION about the responsibility and intended only for a few WEEKS ago about a WEEK or so ago in a week ago about the responsibility of this is the responsibility to my email | |
| 43. |
If a photon is travelling with energy 3 x 10^19 J/atom in space, then what is it's wavelength? |
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Answer» 3 x 10^19 J/atom in space, then what is it's wavelengthatom at the face CENTRE if x atom from corner REPLACE by z atom the formulacorners q atoms at the cube centre of the face of the cube,then write the formula of COMPOUND. |
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| 44. |
Define chromatography |
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Answer» chromatography is a ANALYTICAL TECHNIQUE that separate COMPONENTS in a mixture......follow meh ♥️ |
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| 45. |
Volume of H2 at STP required to reduce 7.95 gram of cupric oxide to give metal |
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Answer» and other side 39659e58w5w8hlflgxlgxlExplanation:don't KNOW if you want 36r9dyoslydlshgkk 406r96496eoyf to GET to the 4 to be able to do it a try and make it easier than the original manufacturer and DISTRIBUTOR for your REPLY and for a couple, but it would like US know when the new York and a bit like to be able the |
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| 46. |
Modern periodic table is based on the atomic number of the elements. The experiment which proved the significance of the atomic number was |
| Answer» TION:HENRY Moseley observed REGULARITIES in the characteristic X-ray spectra of the elements by plotting square ROOT of frequency of x-rays against atomic number which gave a straight LINE. Thereby he showed that the atomic number is the most fundamental property of elements rather than atomic mass. | |
| 47. |
Differential scanning calorimetridy of calf thymus dna was carried out to measure midpoint of thermal denaturation . it has been observed that delta cp = 0, tm= 75.5 degree celsius and delta hm=50.4 kcal/mol. the gibbs free energy change at 37 degree celsius will be |
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Answer» t of a se to a se to the HOST of a se to the host of a CIRCLE ⭕ a B and a se to a se to a b and a se truth 6 |
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| 48. |
What is bivalent and trivanen,tetra valent...give example of each |
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Answer» hey DUDE here is ur answer....bivalent REFERS to those who have a valence of 2...for example oxyzentrivalent MEANS having a valence of 3 ...for example it is nitrogen. |
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| 49. |
The reagent with which both acetaldehyde and acetone react easily is (a) Fehling’s reagent (b) Grignard’s reagent (c) Schiff’s reagent (d) Tollen’s reagent |
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Answer» b is the answer. All other options can easily REACT with acetaldehyde but not with acetone DUE to PRESENCE of ketone.Explanation: Acetaldehyde and acetone both react with Grignard reagent to give secondary and tertiary alcohols RESPECTIVELY. While FEHLING's reagent, Tollen's reagent and Schiff's reagent are reduced by only aldehydes (ie, acetaldehyde) |
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