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. |
Correct order of decreasing reactivity of nucleophillic addition in case of HCHO, CH3CHO and CH3COCH3 is (a) CH3 COH3 > CH3CHO > HCHO (b) HCHO > CH3CHO > CH3COCH3 (c) CH3COCH3 > HCHO > CH3CHO (d) CH3CHO > HCHO > CH3COCH3 |
| Answer» TION:Reactivity increases in the order: #C_6H_5C(=O)CH_3; H_3C-C(=O)CH_3; H_3C-C(=O)H#Explanation:Consider the organic SHRUBBERY substituting the carbonyl group. Phenylacetone has a WHOPPING great PHENYL group; acetone has 2 methyl groups, versus acetaldehyde, 1 methyl, and 1 hydrogen.Now it is well-known that aldehydes are much more reactive than ketones, so acetaldehyde is the MOST reactive. Next comes the ketone, acetone, and least reactive to SUBSTITUTION is the phenylacetone. | |
| 2. |
Which of the following compounds do not undergo aldol condensation? [NCERT Exemplar] |
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Answer» from the FOLLOWING COMPOUNDS a-CH3_CHOdo not UNDERGO ALDOL CONDENSATION |
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| 3. |
Compound can be prepared by the reaction of __________ . [NCERT Exemplar] (a) Phenol and benzoic acid in the presence of NaOH (b) Phenol and benzoyl chloride in the presence of pyridine (c) Phenol and benzoyl chloride in the presence of ZnCl2 (d) Phenol and benzaldehyde in the presence of palladium |
| Answer» COMPOUND can be PREPARED by the reaction ofphenol and BENZALDEHYDE in the PRESENCE of palladium | |
| 4. |
Benzophenone can be obtained by ____________ . [NCERT Exemplar] (a) Benzoyl chloride + Benzene + AlCl3 (b) Benzoyl chloride + Diphenyl cadmium (c) Benzoyl chloride + Phenyl magnesium chloride (d) Benzene + Carbon monoxide + ZnCl2 |
| Answer» EXPLANATION:"BENZOYL chloride+Bezene+AlCl3" is the ANSWER. | |
| 5. |
The correct order of increasing acidic strength is ____________ . [NCERT Exemplarl (a) Phenol < Ethanol < Chloroacetic acid < Acetic acid (b) Ethanol < Phenol < Chloroacetic acid < Acetic acid (c) Ethanol < Phenol < Acetic acid < Chloroacetic acid (d) Chloroacetic acid < Acetic acid < Phenol < Ethanol |
| Answer» ETHANOL < PHENOL < ACETIC ACID < Chloroacetic acid. | |
| 6. |
Cannizaro’s reaction is not given by ____________ . [NCERT Exemplar] |
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Answer» tion:5ju7rfhi8cvjkoolhfessffhnbvftuiiyzfkuwryldigFMogwgpj |
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| 7. |
Which among the given molecules can exhibit tautomerism? (a) III only (b) Both I and III (c) Both I and II (d) Both II and III |
| Answer» LASS is this QUESTION for ??? | |
| 8. |
A single compound of the structure is obtained from ozonolysis of which of the following compound? |
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Answer» have the OPPORTUNITY with my resume to the right place of this message and deleting in this message is INTENDED solely UPON my first thought that is what it looks great weekend in your COMPANY to you in a |
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| 9. |
The product formed by the reaction of an aldehyde with a primary amine is (a) Carboxylic acid (b) Aromatic acid (c) SchifTs base (d) Ketone |
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| 10. |
Which of the following is not soluble in NaHCO3? (a) 2, 4, 6-Trinitrophenol (b) Benzoic acid (c) o-Nitrophenol (d) Benzene sulphonic acid |
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Answer» I think it will be BENZOIC acid PLS mark as BRAINLIST....... |
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| 11. |
How are nucleons represented |
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Answer» In CHEMISTRY and physics, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus. The number of nucleons in a nucleus DEFINES an isotope's mass number (nucleon number). Until the 1960s, nucleons were thought to be ELEMENTARY particles, not MADE up of smaller parts.Explanation:mark ANSWER as brainlist⚪ |
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| 12. |
The revolt of 1857 was ruthlessly supposed by |
| Answer» TION:Indian mutiny,also called sepoy mutiny of first WAR of independence ,WIDESPREAD but unsuccessful REBELLION against British rule in india 1857-59. | |
| 13. |
65. In one of the following compounds, the oxidation number of sulphur is not a wholenumber1)na2s4o6 2)h2so5 3)h2so4 4)na2s2o3 |
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Answer» re Mark as brainlist According to me no oxidation number is in FRACTION If it comes in fraction it will be the avg oxidation number Sum of oxidation STATE on specie = total charge SOLVE it and take x as the oxidation number of which element you want to find oxidation number of Moreover drawing structure is the BEST to find oxidation number |
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| 14. |
Burning of sodium in air observation and chemical reaction. |
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Answer» Sodium reacts with the oxygen in air to form sodium oxide, and traces of YELLOWISH sodium peroxide. 4Na+O2→2Na2O 2Na2O+O2→2Na2O2 The sodium oxide formed will REACT with WATER to give sodium hydroxide. Na2O+H2O→2NaOH The sodium hydroxide formed will react with carbon dioxide to give sodium carbonate, which is RELATIVELY unreactive to the atmosphere, barring the hygroscopicity. 2NaOH+CO2→Na2CO3+H2O |
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| 15. |
Ques 1.The substances you start with is called ______ and after the chemical change, what is formed is called the _______.A)reactants, productsB)reactants , gasesC)element , productsD)element , compoundsQues 2. The substance that initially involved in a chemical reaction is called a reactant.A)TrueBFalseQues 3. State true or false.In a chemical equation, the products are written on the left-hand side and the reactants on the right-hand side with an arrow in between.A)TrueB)FalseQues 4. What is the chemical formula of Potassium?A)KB)NaC)CaD)MgQues5. The new substances produced in a reaction are called as_____________.A)productsB)reactantsC)catalystD)none of theseQues6.Translate the sentence into equation form:A)Hydrogen gas combines with nitrogen to form ammonia.B) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.C)Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.D) Hydrogen + Chlorine → Hydrogen chlorideE) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chlorideF) Sodium + Water → Sodium hydroxide + Hydrogen |
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Answer» The substances that GO into achemical reaction are CALLED thereactants, and the substances PRODUCED at the END of thereaction are known as theproducts. |
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| 16. |
Equimolal solutions of NaCl and BaCl2 are prepared in water. Freezing point of NaCl is found to be -2 °C. What freezing point do you expect for BaCl2 solution ? (Kf is same for both solution) |
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Answer» This is a WRONG QUESTION. PLEASE ASK it in an APPROPRIATE wayExplanation: |
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| 17. |
Which of the following is correct ? 1)isoelectronic ions have same nuclear charge 2)isoelectronic ions have same neutrons 3)isoelectronic ions have same number of electrons 4)all are correct |
| Answer» 1. ONE is CORRECT ANSWER | |
| 18. |
Which ionisation potential in the following eqn involves the greatest amount of energy |
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Answer» The second ionization potential of Liinvolves greatest AMOUNT of ENERGY as it INVOLVES breaking of stable 1s2 electronic configuration.Explanation:pls mark me as BRAINLIEST ❣❣ |
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| 19. |
Which is most reactive towards Nucleophilic substitution reaction? (a) Benzaldehyde (b) Acetophenone |
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| 20. |
Acetophenone when reacted with base C2H5—ONa, yields a stable product: |
| Answer» SORRY I don't,KNOW.... .... | |
| 21. |
Show how you will synthesise the following alcohol prepared by reaction of a suitable Grignard reagent on methanal? [Uttarakhand 2019] |
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Answer» I wish you a happy, SUCCESSFUL and prosperous year ahead because you are such a special sister-in-law. I hope your birthday turns out to be a very memorable EVENT."बाज़ के बच्चे मुँडेर पर नहीं उड़ते।"...बाज पक्षी जिसे हम ईगल या शाहीन भी कहते है.. जिस उम्र में बाकी परिंदों के बच्चे चिचियाना सीखते है उस उम्र में एक मादा बाज अपने चूजे को पंजे में दबोच कर सबसे ऊंचा उड़ जाती है.. पक्षियों की दुनिया में ऐसी TOUGH and tight training किसी भी ओर की नही होती।मादा बाज अपने चूजे को लेकर लगभग 12 KM. ऊपर ले जाती है.. जितने ऊपर अमूमन जहाज उड़ा करते हैं और वह दूरी तय करने में मादा बाज 7 से 9 मिनट का समय लेती है।यहां से शुरू होती है उस नन्हें चूजे की कठिन परीक्षा.. उसे अब यहां बताया जाएगा कि तू किस लिए पैदा हुआ है? तेरी दुनिया क्या है? तेरी ऊंचाई क्या है? तेरा धर्म बहुत ऊंचा है और फिर मादा बाज उसे अपने पंजों से छोड़ देती है।धरती की ओर ऊपर से नीचे आते वक्त लगभग 2 Km. उस चूजे को आभास ही नहीं होता कि उसके साथ क्या हो रहा है.. 7 Km. के अंतराल के आने के बाद उस चूजे के पंख जो कंजाइन से जकड़े होते है, वह खुलने लगते है।लगभग 9 Km. आने के बाद उनके पंख पूरे खुल जाते है.. यह जीवन का पहला दौर होता है जब बाज का बच्चा पंख फड़फड़ाता है।अब धरती से वह लगभग 3000 मीटर दूर है लेकिन अभी वह उड़ना नहीं सीख पाया है.. अब धरती के बिल्कुल करीब आता है जहां से वह देख सकता है उसके स्वामित्व को.. अब उसकी दूरी धरती से महज 700/800 मीटर होती है लेकिन उसका पंख अभी इतना मजबूत नहीं हुआ है की वो उड़ सके। धरती से लगभग 400/500 मीटर दूरी पर उसे अब लगता है कि उसके जीवन की शायद अंतिम यात्रा है.. फिर अचानक से एक पंजा उसे आकर अपनी गिरफ्त मे लेता है और अपने पंखों के दरमियान समा लेता है.. यह पंजा उसकी मां का होता है जो ठीक उसके उपर चिपक कर उड़ रही होती है.. और उसकी यह ट्रेनिंग निरंतर |
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| 22. |
What is the cause of large difference in boiling points of alcohols and ethers? |
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Answer» such a large DIFFERENCE in BOILING point indicate that molecule of ETHANOL are attracted to one another much more is strong that are PROPANE molecules. most of this difference results the ABILITY of ethanol and other alcohol to form intermolecular hydrogen bondExplanation:please mark as brainly |
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| 23. |
Which of the following cannot be used as a good presertive salt , sodium hydroxide , sodium benzoate , sodium metabisulphate |
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| 24. |
CH3CHO and C6H5 CH2CHO can be distinguished chemically by (a) Benedict’s test (b) Iodoform test (c) Tollen’s reagent test (d) Fehling’s solution test |
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Answer» Option 1)Option 1)Benedict testOption 1)Benedict testThis option is incorrect.Option 1)Benedict testThis option is incorrect.Option 2)Option 1)Benedict testThis option is incorrect.Option 2)Iodoform testOption 1)Benedict testThis option is incorrect.Option 2)Iodoform testThis option is correct.Option 1)Benedict testThis option is incorrect.Option 2)Iodoform testThis option is correct.Option 3)Option 1)Benedict testThis option is incorrect.Option 2)Iodoform testThis option is correct.Option 3)Tollen's reagent testOption 1)Benedict testThis option is incorrect.Option 2)Iodoform testThis option is correct.Option 3)Tollen's reagent testThis option is incorrect.Option 1)Benedict testThis option is incorrect.Option 2)Iodoform testThis option is correct.Option 3)Tollen's reagent testThis option is incorrect.Option 4)Option 1)Benedict testThis option is incorrect.Option 2)Iodoform testThis option is correct.Option 3)Tollen's reagent testThis option is incorrect.Option 4)FEHLING solution testOption 1)Benedict testThis option is incorrect.Option 2)Iodoform testThis option is correct.Option 3)Tollen's reagent testThis option is incorrect.Option 4)Fehling solution testThis option is incorrect.KEEP SMILING...MARK AS BRAINLIST....... |
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| 25. |
Propanoic acid with Br2/P4 yields a dibromo product. The structure will be |
| Answer» OPTION B is the CORRECT STRUCTURE of the QUESTION | |
| 26. |
Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and cone. HCl is called: (a) Cope reduction (b) Dow reduction (c) Wolff Kishner reduction (d) Clemensen reduction |
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Answer» : Reduction of ALDEHYDES and ketones into HYDROCARBONS using zinc AMALGAM and CONE HCl is called Clemensen reduction |
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| 27. |
How will you synthesise the following from appropriate alkene: [Uttarakhand 2019] |
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Answer» I can't UNDERSTAND..........?...............? |
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| 28. |
hope the given Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols, and Ethers will help you. If you have any query regarding CBSE Class 12 Chemistry Alcohols, Phenols, and Ethers MCQs Pdf, drop a comment below and we will get back to you at the earliest. |
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Answer» 1. The heating of phenyl methyl ether with HI produces(a) Iodobenzene(b) Phenol(c) Benzene(d) Ethyl chloride2. Which of the following gives positive iodoform TEST?Chemistry MCQs for CLASS 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 13.Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 24. CH3—O—CH (CH3)2 + HI → Products is/areChemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 35.Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 4The product ‘Z’ is(a) Benzaldehyde(b) Benzoic acid(c) Benzene(d) Toluene6. Which one of the following compounds has the most acid nature?Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 57. Among the following sets of reactants which one produces anisole?(a) CH3CHO : RMGX(b) C6H5OH; NaOH, CH3I(c) C6H5OH, neutral FeCl3(d) C6H5 —CH3; CH3COCl; AlCl38. The electrophile involved in Riemer-Tiemann reaction of phenol with CHCl3 in presence of NaOHChemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 69. Arrange the following in decreasing ORDER of acidic character:Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 7(a) IV > III > I > II(b) II > IV > I > III(c) I > II > III > IV(d) III > I > II > IV10.Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 8(a) Etard reaction(b) Gattermann Koch reaction(c) Williamson synthesis(d) Esterification11. Identify ‘C’ in the following:Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 9(a) Water(b) Ethanol(c) Propanone(d) Cumene hydroperoxide12.Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 1013. Find the product of the given reaction:Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 1114.Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 1215. Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields. [NCERT Exemplar](a) o-Cresol(b) m-Cresol(c) 2, 4-Dihydroxytoluene(d) Benzyl alcohol16. How many alcohols with molecular formula C4H10O are chiral in nature? [NCERT Exemplar](a) 1(b) 2(c) 3(d) 417. What is the correct order of reactivity of alcohols in the following reaction? [NCERT Exemplar]Chemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 13(a) 1° > 2° > 3°(b) P < 2° > 3°(c) 3° > 2° > 1°(d) 3° > 1° > 2°18. CH3CH2OH can be converted into CH3CHO by __________ . [NCERT Exemplar](a) catalytic hydrogenation(b) treatment with LiAlH4(c) treatment with pyridinium chlorochromate(d) treatment with KMnO19. IUPAC name of the compoundChemistry MCQs for Class 12 with Answers Chapter 11 Alcohols, Phenols and Ethers 14is _________ . [NCERT Exemplar](a) 1-methoxy-l-methylethane(b) 2-methoxy-2-methylethane(c) 2-methoxypropane(d) isopropylmethyl ether |
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| 29. |
Convert anisole to p-bromoanisole. [Delhi 2015(C)] |
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Answer» here is your ANSWER... |
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| 30. |
Arrange the following in decreasing order of their acidic character: [Similar to AI 2017] |
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| 31. |
Illustrate with examples the limitations of Williamson’s synthesis for the preparation of certain types of ethers. |
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Answer» Alcohols, PHENOLS and ETHERS. Illustrate with examples the limitations of Williamson SYNTHESIS for the preparation of certain type of ethers. Williamson synthesisinvolves SN2 attack may an alkoxide ion on primary alkyl halide. ... In CASE of SECONDARY and tertiary alkyl halide, elimination competes over substitution.Explanation:Mark as brainly please. |
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| 32. |
What is the common name of water soluble bases |
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| 33. |
Number of electrons in 1.8 mL of H2O(l) is about : (A) 6.02 x 1023(B) 3.011 x 1023 (C) 0.6022 x 1021(D) 60.22 x 1020 |
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Answer» CExplanation: now we know that 1mole H2O = 18gm.. 1.8 gm = . 1 mole.. now we know that there are 10 electrons in 1 H2O MOLECULE hence in 1.8 ml its = 6.023*10^23*. |
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| 35. |
How many grams of NaCl are required for a 0.5 m solution of 250 g of water? |
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Answer» 58.5/229.25 is REQUIRED |
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| 36. |
Innermost shell of the earth's crust is called as |
| Answer» CORE...........MARK as BRAINLIEST | |
| 37. |
Piece of paper will float or sink |
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Answer» paper FLOATS because it is less dense than water, so it floats to the surface. HOWEVER, if it gets completely soaked then it will BECOME more dense than water and sink. YES, because paperhas less density than of water. |
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| 38. |
Alkali metals are powerful reducing agents why..? |
| Answer» ALKALI metals have one electron in the outermost shell. MOREOVER, they've low ionisation potential and can lose ELECTRONS easily. Therefore they can undergo OXIDATION easily and are strong REDUCING agents. | |
| 39. |
Which of the following isomers is more volatile: o-nitrophenol or p-nitrophenol? [Delhi 2014] |
| Answer» P NITROPHENOL is more voliatile | |
| 41. |
How would you convert ethanol to ethene? [AI 2011] |
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Answer» Ethanol can be dehydrated to GIVE ethane by heating it with an excess of concentrated SULFURIC ACID at about 170°C. Concentrated phosphoric(V) acid, H3PO4, can be used instead. The acids aren't written into the equation because they SERVE as catalysts. |
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| 42. |
Write the IUPAC name of the given compound: [AI 2015] |
| Answer» 1 ETHOXY -2- METHYL propane.hope it will HELP you...... | |
| 43. |
Write the chemical equation for the preparation of phenol from benzene using oleum and sodium hydroxide. [Delhi 2011(C)] |
| Answer» EXPLANATION: SULPHONATION of benzene with oleum to form benzenesulphonic ACID. Benzenesulphonic acid is converted to sodium phenoxide on heating with molten NaOH. Acidification of sodium salt to GIVE phenol. | |
| 44. |
Write IUPAC name of the given compound: [AI 2015 Chennai and Trivandrum] |
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| 45. |
Why alcohols and phenols are soluble in water? |
| Answer» TION:ALCOHOLS are soluble in water. This is due to the hydroxyl group in the alcohol which is ABLE to FORM hydrogen bons with water molecules. Alcohols with a smaller hydrocarbon chain are very soluble. As the length of the hydrocarbon chain INCREASES, the solubility in water decreases | |
| 46. |
Pencil float or sink |
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Answer» will FLOAT. |
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| 47. |
Write the structure of the following compound: 2-ethoxy-2-methyl pentane |
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Answer» uxyxcigovicOk good....... So the dare is u have to do the same thing on ur story . And I will post a pic of urs with a poll of single or MINGLE . Once u r done LET me KNW. I will post ur pic let's SEE what the people think about you. ______________"_"Ok good....... So the dare is u have to do the same thing on ur story . And I will post a pic of urs with a poll of single or mingle . Once u r done let me knw. I will post ur pic let's see what the people think about you. ______________"_" And don't break the chain |
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| 48. |
Write the IUPAC name of the given compound: [Delhi 2015] |
| Answer» SORRY but where is the COMPOUND | |
| 49. |
Write IUPAC name of the given compound: [AI 2015 Guwahati] |
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Answer» a poll of single or MINGLE . Once u r done let me KNW. I will post ur pic let's see what the people think about you. ______________"_" And don't break the CHAIN |
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