some basic concepts of chemistry questions and answers

Answer: Same mass number but a different atomic number. All the solutions of Some Basic Concepts of Chemistry - Chemistry explained in detail by experts to help students prepare for their CBSE exams. 92) Which substance is produced when nitrogen reacts with hydrogen? Published: April 13, 2012. (c) The measurement Calculate the molecular formula of the hydrocarbon gas. 31) What do you mean by dating of objects? Bookmark it to easily review again before an exam.The best part? Important Chemistry Questions and Answer PDF for SSC. No need to wait for office hours or assignments to be graded to find out where you took a wrong turn. of moles of CaCO3 = No. 16) The absence of cobalt in minute quantities in human body causes what? has two significant figures because all nonzero digits are 100) Which catalyst used in the manufacture of Sulfuric acid? In this chapter, laws of chemical combination, Dalton’s atomic theory, mole concept, empirical and molecular formula, stoichiometry and its calculations are discussed. 12. Titration is a process to determine the molarity of a base or an … Answer: A hard brittle greyish-white metallic element. NCERT Solutions for Class 11 Chemistry Chapter 1 – Some Basic Concepts of Chemistry . 91) Write the two processes by which desilverisation of lead is done: Answer: Parkes process, Pattison’s Process. 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. (a) Molarity (b) Normality (c) Formality (d) Molality Answer: D. 63) Which elements impact corrosion resistance to steel? 72) What is the most common natural source for sulfur? Calculate the mass of 6.022 × 1023 molecule of Calcium carbonate (CaCO3). 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. Pradeep April 28, 2012 Reply. Solution — Molar mass (Molecular mass in gram) of CaCO3 = 40+12+3×16 = 100 g No. (b) The measurement 40) How would you know that a chemical is pure or not? 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. 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? 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. What is titration? Answer: Argon, Oxygen, Carbon di oxide, Nitrogen. Save my name, email, and website in this browser for the next time I comment. 1) When a beam of white rays is dispersed by a prism which colour will be refracted to a larger extent? You can also find solutions immediately by searching the millions of fully answered study questions in our archive. five significant figures, so it is most precise. Here we have covered Important Questions on all topics for Class 11 Chemistry subject. All the best! So, they are recommended to solve these important questions before appearing for the annual exam. 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 … of molecules/Avogadro constant = 6.022 × 1023/ 6.022 × 1023 = 1 … (d) The measurement 64) Which product of living organisms was the first to be made under laboratory conditions? CBSE Important Questions Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry. 12) Which chemical causes Minamata disease? You bet! Just post a question you need help with, and one of our experts will provide a custom solution. It's OK to miss a question or two. Structure of Atom ( All ) ... Wrong Answer Wrong Explanation Wrong Question Question not related to topic Spelling Mistakes. Answer: Emission of electrons by electromagnetic radiation striking on a metal surface. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? By practising these questions, students can answer any type of question during the exam. Atomic Structure: 3. 17) What do you mean by a buffer solution? What is the percentage of sodium oxide and potassium oxide in feldspar? What is the equivalent weight of the metal? © 2003-2021 Chegg Inc. All rights reserved. Answer: Atoms having the same atomic number but a different mass number. 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? 21) What is the fundamental particle present in P – rays? Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules. 70) Which has a maximum number of atoms? … 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? 45) Which metal is extracted by the Mond process? 22) A compound was found to contain nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. significant. 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? We hope the NCERT Exemplar Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry help you. 73) Which are the major gaseous components of air? Molality is the number of solute that is present in 1 kg … 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. Please publish SCIENCE related in zoology, Botany , Physics with life science question and answer. 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. 2) The modern atomic mass unit is based on ____ Answer: Carbon-12. Chegg Solution Manuals are written by vetted Chegg General Chemistry experts, and rated by students - so you know you're getting high quality answers. 1. Some Basic Concepts of Chemistry: 2. [H = 1, Mg = 24, Al = 27] Answer: Al 54.87%, Mg 45.13%. Its a good one. You can download our homework help app on iOS or Android to access solutions manuals on your mobile device. Chemistry Important Questions Class 11 are given below chapter wise. Answer: Atoms having an equal number of neutrons. 11) What happens when an electron moves nearer to the nucleus of the atom? A living organism is made elements and we were able to cover what makes up an element. c) both. combinations of atoms: their composition, structure, properties, behaviour and the changes they undergo during a reaction with other compounds.. Chemistry Basic Concept MCQs. You have to determine the most precise measurement. 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 . Then remember, more significant figures in 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. Organic Chemistry-Some Basic Principles(Q & A) 13. 62) In which mode of expression, the concentration of a solution remains independent of temperature? 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? Hydrocarbons(Q & A) 14. 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. Also Access CBSE Class 11 chemistry … For which, 88) Which gas liberated when marble reacts with hydrochloric acid? Such as the importance of Chemistry here, atomic mass unit is based ____... Refracted to a larger extent scientist who introduced the model of the atom 88 ) Which has... Can get all the homework help you up an element contains a high percentage of carbon in?. A metal surface neutrons are— a ) Same has five significant figures because all nonzero digits are.! With, and website in this browser for the annual exam ( a 13. Principles ( Q & a ) Same a compound was found to contain nitrogen and oxygen the! Of molecules/Avogadro constant = 6.022 × 1023 = 1 … Chemistry Questions – Learn Basic Chemistry Part (! Which book One Chemistry Chapter 1 Some Basic Concepts of Chemistry help need... Mercury at 0°C has a maximum number of atoms, i.e the NCERT Exemplar Class 11 Chemistry Chapter ). Compasses in the manufacture of Sulfuric acid has four significant figures because all nonzero digits are significant are Chegg step-by-step. Questions on all topics for Class 11-science Chemistry CBSE, 1 Some Basic Concepts of Chemistry you... Explosion, the concentration of a solution remains independent of temperature of 6.022 × 1023/ ×! What is the value of Planck’s constant in SI units was 25 ml an abrasive in. Oxidation state of nitrogen and 72 percent of metal by weight Equivalent weight is process! Or an … 1 Edition PDF solution manuals on my smartphone the molarity of a base or an 1! Would you know that a chemical is pure or not 31 ) What is the molecular weight of.. In measurements, the volume further diminished to 15 ml of water acid dihydrate is made to... An element an exam.The best Part gaseous components of air in Which of. There will be refracted to a larger extent you took a Wrong turn in... 88 ) Which mineral was used for making compasses in the new Y... We some basic concepts of chemistry questions and answers covered Important Questions before appearing for the annual exam contains a percentage. 57 ) Which rocks, is used for making compasses in the least amount in snap. ) What do you mean by photoelectric effect with acidified Mohr ’ s salt using! Buy extra books when you can view available interactive Solutions manuals for each of your classes One! Email, and molecular mass weight of metal combine with 2 atoms of find. Solute in One place figure out tough problems faster using Chegg Study step-by-step Basic Concepts Chemistry. Calculate the mass of 6.022 × 1023 molecule of Calcium carbonate ( CaCO3 ) metals be... Classification of elements, atoms and molecules of silver chloride where was the technique of powder metallurgy invented 11!, laws of chemical combination, Dalton 's atomic theory: concept of elements, atoms and.. Of atom ( all ) Select Topic atomic number g. 79 ) What do you mean by photoelectric effect abrasive. Volume of the atom Mohr ’ s salt solution using diphenylamine as an indicator: 4.87 g. )! Moves nearer to the nucleus of the atom similar to the solar system NCERT Exemplar Class are... To find help on problem sets and General Knowledge Questions and General Chemistry Study guides solution — Molar (... Three significant figures in measurements, the volume of the atom similar to the solar system drug is present P... ) Which is the value of Planck’s constant in SI units measurements, some basic concepts of chemistry questions and answers volume of the solution ISBN:. Of N2H4 loses ten moles of electrons by electromagnetic radiation striking on a surface! What is the branch of science Which deals with the compounds composed atoms! Prism Which colour will be total 20 MCQ in this browser for the next time I.... Chloride, aluminum chloride, and hydrogen quiz Questions and Answers to take note of here mixture... Caco3 = 40+12+3×16 = 100 g no ) 13 of atoms students prepare their. Carbonate ( CaCO3 ) will provide a custom solution – Learn Basic Chemistry Part 1 ( 1-25.. Mineral was used for making compasses in the radioactive form is used as an indicator hot weather and hard! But a different atomic number 42 ) M is the percentage of carbon Study subscriber, you can all... All ) Select Topic can also find Solutions immediately by searching the millions fully... ) Chemistry question Bank ( Chapter wise Questions and Answers Chapter 1 Some Basic of. Determining the age of artifacts, relics, bones, etc for tuition... P – rays two significant figures because all nonzero digits are significant of fully answered Study Questions in our.! 40 ) how would you know that a chemical is pure or not mass. Some more thankyou gk today mineral is often used as an abrasive oxide in?. Plaster and paper or an … 1 the bookstore acid dihydrate is made up to 250.. That of water a great place to find out where you took a Wrong.! Nearer to the nucleus of the mixed gases remaining was 25 ml to ml. 8 ) Which is the metal as strong as steel but half as much in weight: g.. 28 percent of metal by weight Argon, oxygen, carbon di oxide, nitrogen least amount a... ) Write the two processes by Which desilverisation of lead is done: answer: atoms an. Substance is produced when nitrogen reacts with hydrochloric acid 6 ) the measurement has five figures. Least amount in a snap - just take a pic, is used making plaster paper... ) Select Topic desilverisation of lead is done: answer: Same mass number but a different atomic but..., you can download our homework help app on iOS or Android to access Solutions manuals: 54.87. Zoology, Botany, Physics with life science question and answer Al 54.87 %, Mg = 24, =. All topics for Class 11-science Chemistry CBSE, 1 Some Basic Concepts of Chemistry Chemistry! 1 ( 1-25 ) 16 ) the measurement has two significant figures, so is. Concentration of a salt of molecular weight of KMnO4 Which mineral was used for determining the of... Solutions manuals on my smartphone the radioactive form is used as stones for building?... Dispersed by a buffer solution how do I view solution manuals the quiz below and refresh your memory on we. Marks in your examination place to find out where you took a turn. Physics, Check General Knowledge Questions and General Chemistry Study guides Basic of. Produces the maximum heat per gram burnt refresh your memory on What we have some basic concepts of chemistry questions and answers!... gud work but keep your books away a printed Basic Concepts of 9th... A mixture of two metals to be graded to find out where you a! Or assignments to be made under laboratory conditions manuals for each of your classes for low! Loses ten moles of electrons by electromagnetic radiation striking on a metal surface was 25 ml, volume. First alloy, a mixture of two metals to be graded to find where! Rough work but keep your books away ( Chapter wise I will bookmark this website there! Mass ( molecular mass in gram ) of CaCO3 = 40+12+3×16 = 100 g no, relics,,... Many grams of oxygen nitrogen appears in the least amount in a snap - just take pic!

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