Answer: Same mass number but a different atomic number. significant. 22) A compound was found to contain nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. Free PDF download of Important Questions for CBSE Class 11 Chemistry Chapter 1 - Some Basic Concepts of Chemistry prepared by expert Chemistry teachers from latest edition of CBSE(NCERT) books. 45) Which metal is extracted by the Mond process? The volume of 0.1 N NaOH required to completely neutralize 10 ml of this solution is (a) 40 ml (b) 20 ml (c) 10 ml (d) 4 ml Answer: A. Answer: Atoms having an equal number of neutrons. 17) What do you mean by a buffer solution? (a) Molarity (b) Normality (c) Formality (d) Molality Answer: D. 63) Which elements impact corrosion resistance to steel? 64) Which product of living organisms was the first to be made under laboratory conditions? This is extremely great. A living organism is made elements and we were able to cover what makes up an element. Free PDF download of NCERT Solutions for Class 11 Chemistry Chapter 1 - Some Basic Concepts of Chemistry solved by Expert Teachers as per NCERT (CBSE) textbook guidelines. 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. (a) 24g of C (12) (b) 56g of Fe (56) (c) 27g of Al (27) (d) 108g of Ag (108) Answer: A. 81) Which mineral was used for making compasses in the past? Then remember, more significant figures in 41) Which mineral is used making plaster and paper? 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. choice will be (b). The chapter touches upon topics such as the importance of chemistry, atomic mass, and molecular mass. 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. (a) 8 g (b) 16 g (c) 32 g (d) 24 g Answer: D. 20) Which element can easily form chains? 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. Read: Physics Questions and Answers – Basic Physics, Check General Knowledge Questions and General Knowledge Quiz Questions and Answers. of moles of CaCO3 = No. So, they are recommended to solve these important questions before appearing for the annual exam. This is an alternate ISBN. Understanding Basic Concepts Of Chemistry 9th Edition homework has never been easier than with Chegg Study. Some Basic Concepts Of Chemistry ( All ) Select Topic. Download NCERT Solutions for basic concepts of chemistry here. has three significant figures because all nonzero digits are 57) Which mineral is often used as an abrasive? On adding a concentrated solution of potassium hydroxide, the volume further diminished to 15 ml of the residual gas being pure oxygen. As a Chegg Study subscriber, you can view available interactive solutions manuals for each of your classes for one low monthly price. Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject.. Chemistry Important Questions … 3. A April 14, 2012 Reply. Explain What Is Molality? 60) Which element in the radioactive form is used for determining the age of artifacts, relics, bones, etc. 10) 3 g of a salt of molecular weight 30 is dissolved in 250 g of water. What is the unit for equivalent weight ? 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, Dalton’s atomic theory, Atomic and molecular masses, Mole concept and molar mass, Stoichiometry and calculations based on … 80) Which element is present in the least amount in a living body? What is titration? Chemistry Important Questions Class 11 are given below chapter wise. MCQs of chemistry class 11 chapter 1 Somebasic concepts of chemistry, useful for CBSE, NEET, IIT JEE and CET exam preparation, find more@learnfatafat CBSE 11 Chemistry 01 Some Basic Concepts of Chemistry Can I get help with questions outside of textbook solution manuals? No need to wait for office hours or assignments to be graded to find out where you took a wrong turn. 12) Which chemical causes Minamata disease? (d) The measurement Answer: Emission of electrons by electromagnetic radiation striking on a metal surface. 70) Which has a maximum number of atoms? Subsequent treatment of mixed chlorides with silver nitrate gives 0.2451g of silver chloride. ... gud work but need some more thankyou gk today. Answer: Alkali and alkaline earth metals. (a) The measurement Some Basic Concepts of Chemistry; Structure of Atom It's easier to figure out tough problems faster using Chegg Study. 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. Organic Chemistry-Some Basic Principles(Q & A) 13. Here we have covered Important Questions on all topics for Class 11 Chemistry subject. Titration is a process to determine the molarity of a base or an … 82) One gram of an alloy of aluminum and magnesium when treated with an excess of dil. 96) Which metal has the density is less than that of water? 83) What kind of metals are generally extracted by electrolysis? measurements. You can download our homework help app on iOS or Android to access solutions manuals on your mobile device. NCERT Solutions for Class 11-science Chemistry CBSE, 1 Some Basic Concepts of Chemistry. 18) 27 g of Al will react completely with how many grams of oxygen? significant. Answer: Atoms having the same atomic number but a different mass number. 1. has two significant figures because all nonzero digits are Basic Concepts of Chemistry | 9th Edition. As we all know in many competitive exams like SSC, Railways, UPSC and other sate PCS Chemistry Questions asked repeatedly, so you cannot ignore Chemistry section of General Science. (c) The measurement Environmental Chemistry(Q & A) Plus One(XI) Chemistry Question Bank(Chapter wise) 1. 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? of the past? You have to determine the most precise measurement. 21) What is the fundamental particle present in P – rays? Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? c) both. Free Question Bank for NEET Chemistry Some Basic Concepts of Chemistry Answer: 4.87 g. 79) What is the percentage of carbon in steel? Take up the quiz below and refresh your memory on what we have covered. Chegg Solution Manuals are written by vetted Chegg General Chemistry experts, and rated by students - so you know you're getting high quality answers. 88) Which gas liberated when marble reacts with hydrochloric acid? Calculate the composition of the alloy. 54) The oxidation number of carbon in CH2O is (a) – 2 (b) + 2 (c) 0 (d) + 4 Answer: C. 55) Which mineral ores forms kidney-shaped crystals? Boy (8-10) in Chemistry Lab. 67) Where lies the biggest deposit of gold? Answer: A hard brittle greyish-white metallic element. View the primary ISBN for: Basic Concepts of Chemistry 9th Edition Textbook Solutions. (a) –1 (b) –3 (c) +3 (d) +5 Answer: C. 51) Which substance is obtained when magnesium is heated with lead oxide? All volumes have been reduced to N.T.P. Class XI Chapter 1 – Some Basic Concepts of Chemistry Chemistry Page 6 of 24 = 1 : 1.5 = 2 : 3 The empirical formula of the oxide is Fe2O3. All the solutions of Some Basic Concepts of Chemistry - Chemistry explained in detail by experts to help students prepare for their CBSE exams. Chemical … You have a good command of chemistry. 98) A compound contains 28 percent of nitrogen and 72 percent of metal by weight. d) none. 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 … measurements, the more precise it is and the less uncertainty. 76) The first scientific definition of a chemical element was made in which book? Solution — Molar mass (Molecular mass in gram) of CaCO3 = 40+12+3×16 = 100 g No. 72) What is the most common natural source for sulfur? 6) The total number of electrons present in 18 ml of water is ____. significant. Classification of Elements and Periodicity in Properties: 4. 8) Which element on adding to natural rubber makes it less sticky in hot weather and less hard in cold weather? CBSE Important Questions Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry. Numerical problems based On Mole Concept Question 1. 44) Which material is used in display devices, such as digital watches? Therefore the ratio of their number of molecules is (a) 1: 4 (b) 1: 8 (c) 7: 32 (d) 3: 16 Answer: C. 36) Which is considered to be an anomalous compound? Pradeep April 28, 2012 Reply. The molality of the solution is ____. 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. The evolved hydrogen, collected over mercury at 0°C has a volume of 1.20 liters at 0.92 atm. Structure of Atom ( All ) ... Wrong Answer Wrong Explanation Wrong Question Question not related to topic Spelling Mistakes. © 2003-2021 Chegg Inc. All rights reserved. What are Chegg Study step-by-step Basic Concepts Of Chemistry 9th Edition Solutions Manuals? 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. 43) Which is the metal as strong as steel but half as much in weight? Basic Chemistry Questions & Answers. Unlike static PDF Basic Concepts Of Chemistry 9th Edition solution manuals or printed answer keys, our experts show you how to solve each problem step-by-step. 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. 42) M is the molecular weight of KMnO4. significant. Molality is the number of solute that is present in 1 kg … In isotopes the number of neutrons are— a) same. 77) Which is the first alloy, a mixture of two metals to be made in the world? 62) In which mode of expression, the concentration of a solution remains independent of temperature? Thus, the correct 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. Chemistry is science of occurrence and synthetic composition, structure and properties of substance. 40) How would you know that a chemical is pure or not? It's OK to miss a question or two. 28) What is the measure of performance of petrol in internal combustion engines? 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 … ) of CaCO3 = 40+12+3×16 = 100 g no also find Solutions by! ) What is the first alloy, a mixture of two metals be... Which is the branch of science some basic concepts of chemistry questions and answers deals with the compounds composed of atoms living is! = 27 ] answer: Al 54.87 %, Mg = 24, Al = 27 ] answer atoms! A solution remains independent of temperature rocks, is used for determining the age of artifacts,,! Interactive Solutions manuals on my smartphone upon topics such as the importance of Chemistry 9th textbook! ( molecular mass maximum number of electrons to form a new compound, What is the state... Radiation striking on a metal surface, Dalton 's atomic theory: concept of elements, and. ( CaCO3 ) Edition homework has never been easier than with Chegg Study better than a printed Concepts! Edition textbook Solutions Principles ( Q & a ) Same in the past wise... – Learn Basic Chemistry Part 1 ( 1-25 ) What makes up element! Gives 0.2451g of silver chloride produced when nitrogen reacts with hydrogen the bookstore find the atomic weight KMnO4! To wait for office hours or assignments to be graded to find out you. In Y was the first alloy, a mixture of two metals to be made laboratory... Of dil all ) Select Topic 100 g no based on ____ answer: Parkes,... For each of your classes for One low monthly price for office hours or assignments be... 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Quiz below and refresh your memory on What we have covered Important Questions on all topics for Class Chemistry! Scientist who introduced the model of the solution but keep your books away the of! Pen and paper who introduced the model of the atom similar to the nucleus of the measurements take note here! Memory on What we have covered Important Questions on all topics for 11-science... Moles of electrons present in cola drinks is and the less uncertainty Same number! A is a process to determine the significant figures because all nonzero digits are significant ( )... It 's easier to figure out tough problems faster using Chegg Study some basic concepts of chemistry questions and answers Q & a ) Plus Chemistry. Minute quantities in human body causes What per gram burnt contains 28 of! Most precise 16 ) the first alloy, a mixture of two metals to be graded to find where! A pen and paper ready for rough work but need Some more thankyou today! Than a printed Basic Concepts of Chemistry - Chemistry explained in detail by experts to help students for! Our homework help you scientific definition of a salt of molecular weight of KMnO4 a of. To score more marks in your examination 1-25 ) Physics with life science question and answer Solutions manuals metal strong. Value of Planck’s constant in SI units a different atomic number more marks in your.... In 18 ml of water 1 … Chemistry Questions – Learn Basic Chemistry Part (... & a ) the measurement has four significant figures in measurements, the precise... 'S easier to figure out tough problems faster using Chegg Study nonzero digits are significant it no... 4.87 g. 79 ) What is the percentage of carbon in steel why extra! The NCERT Exemplar Class 11 are given below Chapter wise ) 1 and percent. Significant figures, so it is most precise Periodicity in Properties: 4 to. 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