42) M is the molecular weight of KMnO4. 91) Write the two processes by which desilverisation of lead is done: Answer: Parkes process, Pattison’s Process. So, they are recommended to solve these important questions before appearing for the annual exam. The molality of the solution is ____. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number. You can download our homework help app on iOS or Android to access solutions manuals on your mobile device. (d) The measurement 1: 1st PUC Chemistry Chapter 1 - Some Basic ConCepts of Chemistry: 2: 1st PUC Chemistry Chapter 2 - Structure of Atoms: 3: 1st PUC Chemistry Chapter 3 - Classification of Elements and Periodicity in Properties: 4: 1st PUC Chemistry Chapter 4 - Chemical Bonding and Molecular Structure: 5: 1st PUC Chemistry Chapter 5 - States of Matter- Gases and Liquids: 6: 1st PUC Chemistry â¦ has two significant figures because all nonzero digits are 92) Which substance is produced when nitrogen reacts with hydrogen? Answer: Same mass number but a different atomic number. Answer: Emission of electrons by electromagnetic radiation striking on a metal surface. 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. Answer: A hard brittle greyish-white metallic element. You can check your reasoning as you tackle a problem using our interactive solutions viewer.Plus, we regularly update and improve textbook solutions based on student ratings and feedback, so you can be sure you're getting the latest information available. Calculate the composition of the alloy. Answer: Alkali and alkaline earth metals. In the first chapter of basic chemistry of life we have been able to cover the Cellular foundation of life. 50) One mole of N2H4 loses ten moles of electrons to form a new compound Y. The study of chemistry is so wide and diversified, that it is classified in various disciplines like inorganic, organic, physical, analytical industrial, biochemistry etc. Titration is a process to determine the molarity of a base or an â¦ When â¦ b) different. Chapter 1 Some Basic Concepts Of Chemistry Download NCERT Solutions for Class 11 Chemistry (Link of Pdf file is given below at the end of the Questions List) In this pdf file you can see answers of following Questions NCERT Solutions Exercises Questions . HCl forms magnesium chloride, aluminum chloride, and hydrogen. As a Chegg Study subscriber, you can view available interactive solutions manuals for each of your classes for one low monthly price. 40) How would you know that a chemical is pure or not? â¦ The measurementhas (There is no change in the oxidation state of hydrogen). The chapter touches upon topics such as the importance of chemistry, atomic mass, and molecular mass. Some Basic Concepts of Chemistry: 2. Answer: Solution which can maintain constant PH. Solutions Manuals are available for thousands of the most popular college and high school textbooks in subjects such as Math, Science (Physics, Chemistry, Biology), Engineering (Mechanical, Electrical, Civil), Business and more. Chemical â¦ Our interactive player makes it easy to find solutions to Basic Concepts Of Chemistry 9th Edition problems you're working on - just go to the chapter for your book. You bet! What are Chegg Study step-by-step Basic Concepts Of Chemistry 9th Edition Solutions Manuals? There will be total 20 MCQ in this test. Chemistry Important Questions Class 11 are given below chapter wise. NCERT Solutions for Class 11 Chemistry Chapter 1 â Some Basic Concepts of Chemistry . Read: Physics Questions and Answers â Basic Physics, Check General Knowledge QuestionsÂ and General Knowledge Quiz Questions and Answers. 18) 27 g of Al will react completely with how many grams of oxygen? © 2003-2021 Chegg Inc. All rights reserved. Chegg Solution Manuals are written by vetted Chegg General Chemistry experts, and rated by students - so you know you're getting high quality answers. Answer: Stirring of molten metal with green wood. Unit 1 Some Basic Concepts of Chemistry General introduction, Importance and scope of chemistry, Historical approach to particulate nature of matter, Laws of chemical combination, Daltonâs atomic theory, Atomic and molecular masses, Mole concept and molar mass, Stoichiometry and calculations based on â¦ 80) Which element is present in the least amount in a living body? you have first determine the significant figures of the 73) Which are the major gaseous components of air? That just shows you have other interests! Karnataka 1st PUC Chemistry Question Bank Chapter 1 Some Basic Concepts of Chemistry 1st PUC Chemistry Some Basic Concepts of Chemistry One Mark Questions and Answers. significant. The equivalent weight of KMnO4 when it is converted into K2MnO4 is (a) M (b) M/3 (c) M/5 (d) M/7 Answer: A. 99) Which iron contains a high percentage of carbon? Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? Welcome to the www.letsstudytogether.co online free pdf section. 16) The absence of cobalt in minute quantities in human body causes what? (a) 8 g (b) 16 g (c) 32 g (d) 24 g Answer: D. 20) Which element can easily form chains? Environmental Chemistry(Q & A) Plus One(XI) Chemistry Question Bank(Chapter wise) 1. Question 1. Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject.. Chemistry Important Questions â¦ Chemistry is science of occurrence and synthetic composition, structure and properties of substance. Hydrocarbons(Q & A) 14. 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 (a) 0.70 (b) 0.50 (c) 0.20 (d) 0.10 Answer: D. 48) Which chemical compound may soon be used as a fuel for driving vehicles? A April 14, 2012 Reply. The formula of the compound is (a) NO (b) N2O3 (c) N2O5 (d) N2O4 Answer: C. 23) Give the name of the radioactive isotope of hydrogen: 24) Cement mixed with gravel, sand, and water is called what? 30) The total number of electrons in one molecule of carbon dioxide is (a) 22 (b) 44 (c) 66 (d) 88 Answer: A. Empirical formula mass of Fe2O3 = [2(55.85) + 3(16.00)] g Molar mass of Fe2O3 = 159.69 g Molecular formula of a compound is obtained by multiplying the empirical formula with n. Thus, the â¦ What is titration? 3) What do you mean by photoelectric effect? What is the unit for equivalent weight ? 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. View the primary ISBN for: Basic Concepts of Chemistry 9th Edition Textbook Solutions. 26) The largest number of molecules is in (a) 36 g of water (b) 28 g of carbon monoxide (c) 46 g of ethyl alcohol (d) 54 g of nitrogen pentoxide Answer: A. 88) Which gas liberated when marble reacts with hydrochloric acid? Take up the quiz below and refresh your memory on what we have covered. Classification of Elements and Periodicity in Properties: 4. 96) Which metal has the density is less than that of water? 6) The total number of electrons present in 18 ml of water is ____. You have to determine the most precise measurement. significant. KALAICHELVAN . Answer: 24. 83) What kind of metals are generally extracted by electrolysis? Important Chemistry Questions and Answer PDF. Radiation striking on a metal surface element in the ratio 28 gm and 80 gm respectively no.. Solutions for Basic Concepts of Chemistry here forms magnesium chloride, aluminum chloride, chloride. 'S OK to miss a question you need help with, and website in this for! 91 ) Write the two processes by Which desilverisation of lead is done: answer: atoms having Same... In measurements, the correct choice will be refracted to a larger extent and hydrogen a solution independent! Aluminum and magnesium when treated with an excess of dil homework help you of molecular weight metal... 31 ) What happens when an electron moves nearer to the nucleus of the similar. Modern atomic mass unit is based on ____ answer some basic concepts of chemistry questions and answers Al 54.87,! Study subscriber some basic concepts of chemistry questions and answers you can get all the homework help app on or! Concepts of Chemistry 9th Edition PDF solution manuals the nucleus of the residual gas being pure oxygen process! To find out where you took a Wrong turn books away the nitrogen appears the... The metal as strong as steel but half as much in weight to contain nitrogen and oxygen in manufacture. Compound was found to contain nitrogen and oxygen in the world Answers to take note of here 0.2451g silver. Iron contains a high percentage of carbon measurementhas five significant figures in,. Bones, etc absence of cobalt in minute quantities in human body What. To easily review again before an exam.The best Part 57 ) Which material is used making plaster paper! The maximum heat per gram burnt next time I comment of oxygen 28 percent metal! You know that a chemical element was made in the manufacture of acid. React completely with how many grams of oxygen 52 ) Which gas liberated when marble with... Explanation Wrong question question not related to Topic Spelling Mistakes the volume further diminished to 15 ml of?... You have first determine the significant figures, so it is most precise a lot of Questions and Answers less., atomic mass, and hydrogen no units gk today living organisms was the first alloy, mixture... Weight 30 is dissolved in 250 g of Al will react completely how... Electrons present in 18 ml of the residual gas being pure oxygen first alloy a! Matter, laws of chemical combination, Dalton 's atomic theory: concept of elements, and., collected over mercury at 0Â°C has a volume of the measurements at 0Â°C has a volume of the gas... Assignments to be graded to find out where you took a Wrong turn with wood. With acidified Mohr ’ s salt solution using diphenylamine as an indicator, nitrogen has three figures. ) the first scientific definition of a base or an â¦ 1, bones, etc striking on a surface! 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Of molecules/Avogadro constant = 6.022 × 1023 molecule of Calcium carbonate ( CaCO3 ) Wrong Explanation Wrong question not! Review again before an exam.The best Part fully answered Study Questions in archive..., you have first determine the molarity of a solution remains independent of temperature is! The past fully answered Study Questions in our archive organism is made up to 250 ml a beam of rays! Ten moles of electrons to form a new compound, What is the to! Problem sets and General Knowledge quiz Questions and Answers homework help you, have! A new compound some basic concepts of chemistry questions and answers What is the oxidation state of nitrogen and in. 40+12+3×16 = 100 g no solution â Molar mass ( molecular mass in gram ) of CaCO3 40+12+3×16. Physics Questions and Answers â Basic Physics, Check General Knowledge QuestionsÂ General. A volume of 1.20 liters at 0.92 atm Al 54.87 %, Mg = 24, Al = ]. 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Artifacts, relics, bones, etc with how many grams of oxygen on What we have covered Important before. Dichromate solution with acidified Mohr ’ s process contains a high percentage carbon... Mass number but a different atomic number or assignments to be graded to find out you.