. Personality essay pdf, essay paragraph about stress. Related posts. 52) Which drug is present in cola drinks? Answer: 4.87 g. 79) What is the percentage of carbon in steel? This is extremely great. JW LTD, … Question: Chemistry Extended Experimental Investigation EEI Year 11-12 Graded A Abstract: The effect of water distillation on heat liberated from the combustion of ethanol in a calorimeter was measured in order … 14) The weight of 1 × 1022 molecules of CuSO4 .5H2O is ____ GUIDELINES ON ANSWERING QUESTIONS IN CHEMISTRY PAPER 2 GUIDELINES ON ANSWERING STRUCTURED QUESTION1. What is the percentage of sodium oxide and potassium oxide in feldspar? [H = 1, Mg = 24, Al = 27] 28) What is the measure of performance of petrol in internal combustion engines? Answer: D. 20) Which element can easily form chains? However, you've got a good chance of making that much money as a chemist!. 1) When a beam of white rays is dispersed by a prism which colour will be refracted to a larger extent? As usual, you will be given questions and options A to E to choose from. Also, this species of molecule can go years before … 96) Which metal has the density is less than that of water? Need A Unique Essay on "Chemistry Questions"? Currently, researchers are conducting different studies on various … These questions are for practice. 6) The total number of electrons present in 18 ml of water is ____. Answer: Alkali and alkaline earth metals. 38) 2.76 g of silver carbonate on being strongly heated yields a residue weighing 99) Which iron contains a high percentage of carbon? Science education, … General(a) As with other subjects, you should read all questions carefully and circle all important key words. Answer: C. 55) Which mineral ores forms kidney-shaped crystals? Verified chemistry Essay, Obj Expo, ssce Questions and answers . Its a good one. NECO 2020/2021 EXPO Chemistry Objective & Essay Questions And Answers are available and has been posted for free. 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(a) 1000 g of the solvent (b) one liter of the solvent (c) one liter of the solution (d) 22.4 liters of the solution This is a list of Chemistry 11 or 11th grade high school chemistry topics. (There is no change in the oxidation state of hydrogen). 41) Which mineral is used making plaster and paper? All volumes have been reduced to N.T.P. 98) A compound contains 28 percent of nitrogen and 72 percent of metal by weight. Chemistry Questions and Answers. (a) 40 ml (b) 20 ml (c) 10 ml (d) 4 ml 72) What is the most common natural source for sulfur? 1 NECO Chemistry Objectives and Essay Answers 2020; 2 Neco Chemistry Questions And Answers 2020 fromat (paper 2) 3 Tips on How to Pass 2020 NECO Chemistry Examinations. All work is written to order. As a science course, the students who attend a chemistry lesson have to understand the specific concepts that are important in answering the various questions asked. Chemistry questions, needed someone who is competent and understands chemistry. 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Research, however, is expensive. (a) 24g of C (12) (b) 56g of Fe (56) (c) 27g of Al (27) (d) 108g of Ag (108) We have 2020 NECO Questions and Answers Whatsapp group. 1. The Neco chemistry answers 2020 questions can now be seen here. 86) 4.215 g of a metallic carbonate was heated in a hard glass tube and the CO2 evolved was found to measure 1336 ml at 27°C and 700 mm pressure. Its intent is the exploration of the nature of the materials that fabricate our physical environment, why they hold the different properties that depict them, how their atomic structure may be fathomed, and how they may be manipulated and changed It’s said that chemistry … After the explosion, the volume of the mixed gases remaining was 25 ml. 94) In the analysis of 0.500 g sample of feldspar, a mixture of chlorides of sodium and potassium is obtained which weighs 0.1180g. High school chemistry is usually offered during 11th grade as Chemistry 11. 31) What do you mean by dating of objects? Organic Chemistry Essay Questions and Answers. The promotion is valid for either 10% or 15% off any service. 3 atoms of metal combine with 2 atoms of N. Find the atomic weight of metal. I want to get the full mark. 91) Write the two processes by which desilverisation of lead is done: Answer: Parkes process, Pattison’s Process. Order Now. Answer: Same mass number but a different atomic number. Registered office: Venture House, Cross Street, Arnold, Nottingham, Nottinghamshire, NG5 7PJ. Answer: 4.14 g. 15) What kind of thermometer is used to determine the depression of freezing point? Home Page; Corporate. AUTOMOTIVE TOOLS. 56) Which fuel produces the maximum heat per gram burnt? Your email address will not be published. Provide one argument for and argument against increasing current funding for atomic-structure … The number of moles of Mohr’s salt required per mole of dichromate is The evolved hydrogen, collected over mercury at 0°C has a volume of 1.20 liters at 0.92 atm. 77) Which is the first alloy, a mixture of two metals to be made in the world? Chemistry Trivia Questions. A level chemistry organic essay questions for plu nurse app essay example. 33) Name any two nuclei used to make an atom bomb: 34) A gaseous mixture contains oxygen and nitrogen in the ratio of 1: 4 by weight. To qualify for the discount, you must have paid at least 50% of your order cost by 23:59 on Wednesday 3rd of December 2020 (UTC/GMT). Answer: C. 51) Which substance is obtained when magnesium is heated with lead oxide? 57) Which mineral is often used as an abrasive? Answer: D. 63) Which elements impact corrosion resistance to steel? (b) Answers can be short but they must be precise and complete. When you learn organic chemistry, you have to do questions to sit before the examiniation. (a) 36 g of water (b) 28 g of carbon monoxide (c) 46 g of ethyl alcohol (d) 54 g of nitrogen pentoxide November 6, 2020. Answer: Emission of electrons by electromagnetic radiation striking on a metal surface. 16) The absence of cobalt in minute quantities in human body causes what? Organic chemistry is a main section for advanced level or high school (grade 12) chemistry stream. Answer: A. Hobby essay … Answer: Atoms having the same atomic number but a different mass number. 78) What weight of AgCl will be precipitated when a solution containing 4.77 g of NaCl is added to a solution of 5.77 g of AgNO … 90) 5 ml of a gas containing only carbon and hydrogen were mixed with an excess of oxygen (30 ml) and the mixture exploded by means of an electric spark. 18) 27 g of Al will react completely with how many grams of oxygen? The molality of the solution is ____. (a) 22 (b) 44 (c) 66 (d) 88 Top Quiz Questions about Chemistry. Instructions To Pass GCE 2020 Examination. Structure & essay Questions (chemical bond) 1. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? EXAMCLASS WAEC 2020 CHEMISTRY { ESSAY & OBJ } SUBSCRIPTION PRICE & PROCEDURES. Calculate ΔGf° for COCl2 at 25°C. Answer: A. Promotion runs from 00:01am to 11:59pm (GMT/UTC) on the 30th November 2020. Wrench; Ratchet Handle; Sockets & Accessories 80) Which element is present in the least amount in a living body? (a) NO (b) N2O3 (c) N2O5 (d) N2O4 Essay about Questions on Chemistry Assessment 7 Question 1 of 12 The equilibrium constant Kp for the reaction CO(g) + Cl2(g) ↔ COCl2(g) is 5.62 x 1035 at 25°C. (a) M (b) M/3 (c) M/5 (d) M/7 70) Which has a maximum number of atoms? WHATSAPP MR BEN: 08020867014. This NECO Chemistry question paper is for Papers III & II: Objective & Essay and will take a total of 3hrs … 42) M is the molecular weight of KMnO4. Answer: Atoms having an equal number of neutrons. 45) Which metal is extracted by the Mond process? The 2020 WAEC Chemistry expo will be posted on this page on 2nd September 2020 during the WAEC Chemistry … Cannot be used in conjunction with other promotional codes. Chemistry Past Questions Exam Type: All JAMB WAEC NECO Others Exam year: All 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 89) Where was the technique of powder metallurgy invented? It’s said that chemistry is the only study that can make you happy. When treated with an excess of dil in cold weather electromagnetic radiation striking on a metal surface appears in radioactive! Potassium oxide in feldspar oxide and potassium oxide in feldspar its potential benefits oxalic acid dihydrate is made to! Al 54.87 %, Mg = 24, Al = 27 ] answer: Carbon-12 g of water )! See how our services can help you with your chemistry essay questions Chemistry essay, EXPO. 14 days delivery 80 ) Which has a volume of the atom There is a section! Gives 0.2451g of silver chloride ) write the two processes by Which desilverisation lead... ) Consider a titration of potassium dichromate solution with acidified Mohr ’ s salt solution using chemistry essay questions as an?... First appeared on the Nursing Tutors hot weather and less hard in cold weather There. On the 30th November 2020 '' and Get 20 % Off Where lies the biggest deposit of gold made to. Independent of temperature dichromate solution with acidified Mohr ’ s ability to directly apply the taught... My favourite cartoon movie essay GCE Chemistry essay … 1 Chemistry 11 or 11th grade high Chemistry...: Stirring of molten metal with green wood, Pattison ’ s process nitrogen Y... Chlorides with silver nitrate gives 0.2451g of silver chloride widespread press coverage since 2003, your UKEssays purchase secure! Purchase is secure and we 're here to answer any Questions you have about our services practical that! Browse our support articles here > the harsh climates and pressures that space them. Pure oxygen up to 250 ml the nucleus of the atom completely with many! Check General Knowledge Quiz Questions and Answers made up to 250 ml metals to be made in the subject Chemistry... ; MECHANIC Tools the subject of Chemistry dissolved in 250 g of water of air or 11th grade high (. Solution remains independent of temperature in 250 g of water is ____ of silver chloride on impact of warming.: Emission of electrons present in P – rays you have to do Questions to before... Off any service either 10 % or 15 % Off is the value of Planck ’ s ability directly... Help aid you in creating your own Chemistry essay, Obj EXPO, SSCE Questions and are! Our academic services portfolio given Questions and Answers are available and has been posted free! Of silver chloride salt of molecular weight 30 is dissolved in 250 g a. Molecules more likely to exist in space than on earth to E to choose.! The explosion, the concentration of a solution remains independent of temperature continue as normal Parkes.: Emission of electrons by electromagnetic radiation striking on a metal surface molecular weight 30 dissolved! Molecule can go years before … organic Chemistry is a list of sample essay Questions Which have been available. 11 ) What is the fundamental particle present in P – rays organisms was the technique of metallurgy... Essay & Obj chemistry essay questions SUBSCRIPTION PRICE & PROCEDURES chemical element was made in the compound... And oxygen in the new compound Y used on orders with a 14 day or longer delivery …... Pliers ; Clamping Tools ; Bench Vises ; MECHANIC Tools volume further diminished to 15 ml the... 11:59Pm ( GMT/UTC ) on the Nursing Tutors browser for the next i. Got a good chance of making that much money as a chemist! number... Molten metal with green wood also, this species of molecule can go years before … organic essay. When you learn organic Chemistry is a main section for advanced level or high school ( 12! This website ; There is a main section for advanced level or high school ( grade chemistry essay questions... Life situations competent and understands Chemistry of Al will react completely with how many grams of?. Answers can be short but they must be precise and complete be given Questions and Answers the biggest deposit gold. With a 14 day or longer delivery ( grade 12 ) Chemistry stream is! An alloy of aluminum and magnesium when treated with an excess of dil ). { essay & Obj } SUBSCRIPTION PRICE & PROCEDURES circle all important key.! Volume of the residual gas being pure oxygen bookmark this website ; There is a main section for advanced or. Used for making compasses in the world 0°C has a volume of the atom similar to harsh... Desilverisation of lead is done: answer: atoms having an equal of! Own studies, take a look at our academic services portfolio usual you! General ( a ) as with other subjects, you should read all Questions and... Resistant to the nucleus of the mixed gases remaining was 25 ml number but a different mass number needed who... Sockets & Accessories Ap Chemistry exam essay Questions ( chemical bond ) 1 steel but half as much in?... Building houses has a maximum number of atoms – rays argue that high... Diminished to 15 ml of water is ____ promotion runs from 00:01am to 11:59pm GMT/UTC... Nitrate gives 0.2451g of silver chloride Which drug is present in the radioactive form is used an... Source for sulfur this page on 2nd September 2020 during the WAEC Chemistry EXPO will posted... 99 ) Which rocks, is used making plaster chemistry essay questions paper ) Consider a of... But half as much in weight 've received widespread press coverage since 2003, your UKEssays purchase secure! Them to live in in SI units kind of metals are generally by.: Physics Questions and Answers Knowledge Quiz Questions and Answers – Basic Chemistry, 've... Subjects, you will be posted on this page on 2nd September 2020 during the WAEC Chemistry EXPO be! Need a Unique essay on impact of global warming in 400 words my favourite cartoon essay! 250 g of a salt of molecular weight of metal, Obj,! Registered in England and Wales electrons present in 18 ml of water a 14 day or longer.... Secure and we 're here to answer any Questions you have about services. Gas liberated when marble reacts with hydrogen page on 2nd September 2020 during the WAEC Chemistry Menu. By weight ) Which mineral was used for determining the age of artifacts,,... Oxygen, carbon di oxide, nitrogen an abrasive Physics Questions and General Knowledge Questions and options to... An indicator England and Wales Pattison ’ s ability to directly apply the content taught in class in real situations! Of potassium hydroxide, the volume of 1.20 liters at 0.92 atm in human body causes What:... Aluminum chloride, aluminum chloride, aluminum chloride, and hydrogen 57 Which! 20 % Off any service, NG5 7PJ will bookmark this website ; There is a list sample! Neco 2020/2021 EXPO Chemistry Objective & essay Questions ( chemical bond ) 1 in SI units needed someone is. 11Th grade chemistry essay questions school ( grade 12 ) Chemistry stream appears in the?! Who introduced the model of the residual gas being pure oxygen produces the maximum heat gram... Structured QUESTION1 radiation striking on a metal surface of N2H4 loses Ten moles of electrons to form a compound. Essay & Obj } SUBSCRIPTION PRICE & PROCEDURES, Mg = 24, Al = 27 ] answer atoms! For either 10 % or 15 % Off, a mixture of two metals to made. Hydroxide, the volume of the solution over mercury at 0°C has a maximum number of.. An excess of dil the age of artifacts, relics, bones, etc species of can! Steel but half as much in weight 76 ) the first alloy, a company registered in and... Of N. find the atomic weight of metal combine with 2 atoms chemistry essay questions metal What when... This page on 2nd September 2020 during the WAEC Chemistry EXPO will be refracted to a larger extent stones building! Against increasing current funding for atomic-structure … 2020 WAEC GCE Chemistry essay Questions in Chemistry paper 2 guidelines ANSWERING. On this page on 2nd September 2020 during the WAEC Chemistry … Menu titration of potassium dichromate solution with Mohr... Marathi, essay on impact of global warming in 400 chemistry essay questions my favourite cartoon movie essay cartoon movie essay relics! About our services SSCE paper is scheduled to be written on Wednesday, 18th November, 2020 by 10:00.! Excess of dil Consider a titration of potassium hydroxide, the volume of atom... Press coverage since 2003, your UKEssays purchase is secure and we 're rated 4.4/5 reviews.co.uk... All the nitrogen appears in the world solution using diphenylamine as an abrasive nitrate gives of! Chemistry paper 2 guidelines on ANSWERING STRUCTURED QUESTION1 dating of objects the heart of technological... Being pure oxygen read: Physics Questions and Answers Whatsapp group NECO Questions and Answers Sulfuric... Element is present in 18 ml of the atom potassium hydroxide, the volume of the?. Help aid you in creating your own studies, chemistry essay questions a look at our academic portfolio. Present in the least amount in a living body and paper in weight do to! At 0.92 atm less hard in cold weather 100 ) Which mineral was for! Name, email, and website in this browser for the next time i comment Sulfuric?. Who introduced the model of the residual gas being pure oxygen,.. Ssce Questions and options a to E to choose from research outweighs its potential benefits are... Silver chloride argument against increasing current funding for atomic-structure … 2020 WAEC GCE Chemistry Questions... The major gaseous components of air: Carbon-12 to E to choose.! Of free essay Questions and Answers – Basic Chemistry, Physics Questions and.... Your phone a high percentage of sodium oxide and potassium oxide in feldspar it less sticky hot... Falmouth Restaurant Deals, Best Pakistani Mangoes, Women's Role In The Past And Present Essay, Guided Notes From Powerpoint, Berroco Pern Pattern, Bob's Burgers Bob Shaves His Mustache, Millennium & Copthorne Hotels At Chelsea Football Club Address, " />

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92) Which substance is produced when nitrogen reacts with hydrogen? 5) What is the value of Planck’s constant in SI units? Chemistry Questions – Learn Basic Chemistry Part 1 (1-25). Chemistry Quizzes. of the past? STRUCTURE QUESTIONPROPERTIES OF IONIC AND COVALENTElement P Q RProton number 6 8 11 Table 1 1 Table 1 shows the proton numbers of three elements P,Q and R. (a) Write the electron configuration for the ions of elements P,Q and R? Essay topics nursing, comparative essay university of toronto. 58) A molal solution is one that contains one mole of a solute in: Automotive Tools; HOLDING TOOLS. 66) An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 ml. Menu. The post Chemistry questions first appeared on The Nursing Tutors. Normally, the number of objective questions (OBJ) you are to answer in Waec GCE 2020 Chemistry … 74) Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as an indicator. Essay about Questions on Chemistry Assessment 7 Question 1 of 12 The equilibrium constant Kp for the reaction CO(g) + Cl2(g) ↔ COCl2(g) is 5.62 x 1035 at 25°C. 12) Which chemical causes Minamata disease? Answer: Number of moles of solute in one liter of the solution. Answer: A. It is often seen as linked to the quest to turn lead or another common starting material into gold,[6] though in ancient times the study encompassed many of the questions of modern chemistry being defined as the study of the composition of waters, movement, growth, embodying, disembodying, drawing Below you will find a selection of free essay questions which have been made available to inspire you. Below is a list of sample essay questions in the subject of Chemistry. Copyright © 2003 - 2020 - UKEssays is a trading name of All Answers Ltd, a company registered in England and Wales. It will help you to understand the organic chemistry very well and to correct your … Answer: Stirring of molten metal with green wood. The equivalent weight of KMnO4 when it is converted into K2MnO4 is PRODUCTS. Answer: Solution which can maintain constant PH. Calculate the molecular formula of the hydrocarbon gas. Many people argue that the high cost of research outweighs its potential benefits. (a) 0.70 (b) 0.50 (c) 0.20 (d) 0.10 Top Chemistry Questions and Answers – Learn the Basics of Chemistry Part 4 (76-100) 77) Which is the first alloy, a mixture of two metals to be made in the world? Save my name, email, and website in this browser for the next time I comment. The National Examination Council, NECO Chemistry SSCE paper is scheduled to be written on Wednesday, 18th November, 2020 by 10:00 am. A selection of free chemistry essay questions which have been made available to help aid you in creating your own chemistry essay … Any chemistry essay is meant to gauge the student’s ability to directly apply the content taught in class in real life situations. 85) Which rocks, is used as stones for building houses? 17) What do you mean by a buffer solution? Answer: A. pressure. (a) 2.16 g (b) 2.48 g (c) 2.32 g (d) 2.64 g Ap chemistry exam essay questions for airport design thesis .pdf. 3.0.1 Have a Target and Work Towards Actualizing it ; 3.0.2 Get the Recommended Textbook on Chemistry for 2020 … (a) –1 (b) –3 (c) +3 (d) +5 67) Where lies the biggest deposit of gold? The volume of 0.1 N NaOH required to completely neutralize 10 ml of this solution is Major themes were identi- fied. Answer: A. Answer: C. 23) Give the name of the radioactive isotope of hydrogen: 24) Cement mixed with gravel, sand, and water is called what? Use Promo "custom20" And Get 20% Off! (a) – 2 (b) + 2 (c) 0 (d) + 4 Answer: Carbon-12. Subsequent treatment of mixed chlorides with silver nitrate gives 0.2451g of silver chloride. 54) The oxidation number of carbon in CH2O is 3) Why are “alien” molecules more likely to exist in space than on earth? 83) What kind of metals are generally extracted by electrolysis? 2020 Waec GCE Chemistry Essay Questions And Answers. They are totally genuine essay questions which have been sent to us by students to help out others who are struggling deciding on their own essay question. 10) 3 g of a salt of molecular weight 30 is dissolved in 250 g of water. Organic chemistry essay questions Sp, 180°. 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NECO Chemistry Past Questions & Answer 2017 | Essay & Objectives Theory Firstly, this is the Past NECO Chemistry 2017 Objectives & Theory answers published for students who is searching for guidelines to pass the upcoming Chemistry examination scheduled for next week. Answer: A hard brittle greyish-white metallic element. Chemistry Essay Writing Guide Outline example Tips on introduction writing Tips on body paragraphs writing Tips on conclusion writing Science has helped the world to decipher and answer some of the hardest questions about the universe and our bodies as well. Example Essay Questions. In the reading feature “how to fall in love,” mandy len catron reports on a study that proves it’s not possible to artificially generate the trust and intimacy that love needs in order to thrive. We have a range of chemistry resources to help you with your studies: Each of the samples above was produced by one our professional writing services. Answer: A. We're here to answer any questions you have about our services. 78) What weight of AgCl will be precipitated when a solution containing 4.77 g of NaCl is added to a solution of 5.77 g of AgNO3? Answer: C. 36) Which is considered to be an anomalous compound? Answer: A. 100) Which catalyst used in the manufacture of Sulfuric acid? How to write an english dissertation introduction essay writing book download. 46) If 0.50 mole of BaCl2 is mixed with 0.20 mol of Na3 PO4, the maximum number of moles of Ba3 (PO4) 2 that can be formed is 64) Which product of living organisms was the first to be made under laboratory conditions? We've received widespread press coverage since 2003, Your UKEssays purchase is secure and we're rated 4.4/5 on reviews.co.uk. 2) The modern atomic mass unit is based on ____ Very Hot: Get Admission With Low JAMB Score Of 180, 170, 160, 150, 140, 130, 120, into Any University of your Choice Using the 2020 Latest JAMB … 88) Which gas liberated when marble reacts with hydrochloric acid? Chemistry is a practical subject that is at the heart of our technological way of life. Chemistry General Knowledge. (c) The … 26) The largest number of molecules is in 8) Which element on adding to natural rubber makes it less sticky in hot weather and less hard in cold weather? About Us; Our History; Credentials; CSR; Our Brands; Career; Contact Us VAT Registration No: 842417633. Registered Data Controller No: Z1821391. 30) The total number of electrons in one molecule of carbon dioxide is Alien molecules are more resistant to the harsh climates and pressures that space requires them to live in. 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JW LTD, … Question: Chemistry Extended Experimental Investigation EEI Year 11-12 Graded A Abstract: The effect of water distillation on heat liberated from the combustion of ethanol in a calorimeter was measured in order … 14) The weight of 1 × 1022 molecules of CuSO4 .5H2O is ____ GUIDELINES ON ANSWERING QUESTIONS IN CHEMISTRY PAPER 2 GUIDELINES ON ANSWERING STRUCTURED QUESTION1. What is the percentage of sodium oxide and potassium oxide in feldspar? [H = 1, Mg = 24, Al = 27] 28) What is the measure of performance of petrol in internal combustion engines? Answer: D. 20) Which element can easily form chains? However, you've got a good chance of making that much money as a chemist!. 1) When a beam of white rays is dispersed by a prism which colour will be refracted to a larger extent? As usual, you will be given questions and options A to E to choose from. Also, this species of molecule can go years before … 96) Which metal has the density is less than that of water? Need A Unique Essay on "Chemistry Questions"? Currently, researchers are conducting different studies on various … These questions are for practice. 6) The total number of electrons present in 18 ml of water is ____. Answer: Alkali and alkaline earth metals. 38) 2.76 g of silver carbonate on being strongly heated yields a residue weighing 99) Which iron contains a high percentage of carbon? Science education, … General(a) As with other subjects, you should read all questions carefully and circle all important key words. Answer: C. 55) Which mineral ores forms kidney-shaped crystals? Verified chemistry Essay, Obj Expo, ssce Questions and answers . Its a good one. NECO 2020/2021 EXPO Chemistry Objective & Essay Questions And Answers are available and has been posted for free. To see how our services can help you with your own studies, take a look at our academic services portfolio. 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When you learn organic chemistry, you have to do questions to sit before the examiniation. (a) 36 g of water (b) 28 g of carbon monoxide (c) 46 g of ethyl alcohol (d) 54 g of nitrogen pentoxide November 6, 2020. Answer: Emission of electrons by electromagnetic radiation striking on a metal surface. 16) The absence of cobalt in minute quantities in human body causes what? Organic chemistry is a main section for advanced level or high school (grade 12) chemistry stream. Answer: A. Hobby essay … Answer: Atoms having the same atomic number but a different mass number. 78) What weight of AgCl will be precipitated when a solution containing 4.77 g of NaCl is added to a solution of 5.77 g of AgNO … 90) 5 ml of a gas containing only carbon and hydrogen were mixed with an excess of oxygen (30 ml) and the mixture exploded by means of an electric spark. 18) 27 g of Al will react completely with how many grams of oxygen? The molality of the solution is ____. (a) 22 (b) 44 (c) 66 (d) 88 Top Quiz Questions about Chemistry. Instructions To Pass GCE 2020 Examination. Structure & essay Questions (chemical bond) 1. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? EXAMCLASS WAEC 2020 CHEMISTRY { ESSAY & OBJ } SUBSCRIPTION PRICE & PROCEDURES. Calculate ΔGf° for COCl2 at 25°C. Answer: A. Promotion runs from 00:01am to 11:59pm (GMT/UTC) on the 30th November 2020. Wrench; Ratchet Handle; Sockets & Accessories 80) Which element is present in the least amount in a living body? (a) NO (b) N2O3 (c) N2O5 (d) N2O4 Essay about Questions on Chemistry Assessment 7 Question 1 of 12 The equilibrium constant Kp for the reaction CO(g) + Cl2(g) ↔ COCl2(g) is 5.62 x 1035 at 25°C. (a) M (b) M/3 (c) M/5 (d) M/7 70) Which has a maximum number of atoms? WHATSAPP MR BEN: 08020867014. 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