Determine the empirical formula of an oxide of Iron which has 69.9 % iron and 30.1 % dioxygen by mass. Given that the molar mass of the oxide is 159.8 g mol-1(Atomic mass: Fe = 55.85, O = 16.00 amu)Calculation of Empirical Formula. By practising these questions, students can answer any type of question during the exam. What mass of CaC03 is required to react completely with 25 mL of 0.75 M HCl? Answer: Question 25. Hence, the answer should have 3 significant figures. Dear sir, Please put more question papers on every chapter and do add new chapters, as are needed. How many significant figures should be present in the answer of the following? Answer: According to Dalton’s atomic theory, an atom is the ultimate particle of matter which cannot be further divided. (i) Number of moles of carbon atoms (ii) Number of moles of hydrogen atoms Answer: 1 a.m.u. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 2 Solutions. A total of 40 questions are there in CBSE Class 11 Chemistry NCERT Solutions for students to practice. Class 11 Class 11 Study Notes, Worksheet and Question Papers . Question 14. 2 mol of A will react with 2 mol of B. Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040. How many grams of HCl react with 5.0 g of manganese dioxide? Therefore,C02 produced from the combustion of 1 mole of carbon = 44 g.(ii) As only 16 g of dioxygen is available, it can combine only with 0.5 mole of carbon, i.e., dioxygen is the limiting reactant. 2 mol of HCl, i.e., 2 x 36.5 g = 73 g HCl react completely with CaC03 = 1 mol = 100 g, Question 36. Answer: The balanced equation for the combustion of carbon in dioxygen/air is Answer: Question 16. Step 2. The vapour density of a mixture of N02 and N204is 38.3 at 27°C. Answer: (i) 2 (ii) 3 (iii) 4 (iv) 3 (v) 4 (vi) 5. These Worksheets for Grade 11 Chemistry, class assignments and practice tests have been prepared … Answer:  (a) 1 gram atom of Mg = 24g Download free printable worksheets for CBSE Class 11 Chemistry with important topic wise questions, students must practice the NCERT Class 11 Chemistry worksheets, question banks, workbooks and exercises with solutions which will help them in revision of important concepts Class 11 Chemistry. Round up the following upto three significant figures: Pressure is determined as force per unit area of the surface. These questions cover all the important topics and are designed exclusively for students exam preparation. We hope the NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry help you. Now, 1000 g of sugar cost = Rs 6, Question 5. Calculate the number of moles of N02  in 100 g of the mixture. (i) In air, combustion is complete. Answer: The chemical equation for the decomposition of KCl03 is. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. In the reaction, A + B2——> AB2, identify the limiting reagent, if any, in the following mixtures Calculate no. Answer: We know that, 1 min = 60 s Physics. I.Very Short Answer Type Questions 11th Class Chemistry Short Questions Answers. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Question 6. 3 moles of C2H6 will contain H-atoms = 18 moles. Question 15. Chemistry textbook solutions for Class 11 Chemistry comprises numerical problems as well as important questions to help you practice every level of questions that might be asked in the exam. 200 molecules of B will react with 200 atoms of A and 100 atoms of A will be After covering all the stepwise solutions given by our subject expert teachers, the student will be able to score good marks. Calculate the number of atoms in each of the following: Hence,C02 produced = 22 g.(iii) Here again, dioxygen is the limiting reactant. or 1 u = 1/12 th mass of an atom of carbon 12. Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are 69.9 and 30.1 respectively. Hence, A is the limiting reagent. 2.6 min = 2.6 min x conversion factor = 2.6 x 60s/1min= 156 s. Question 3. 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Answer: Molality is defined as the moles of solute per kilogram of solvent. Question 12. .•. Which one of the following will have largest number of atoms? How are 0.50 mol Na2C03 and 0.50 M Na2C03 different? Chapter-wise Important Questions for Class 11 Chemistry: Students can access the chapter wise Important Questions for Class 11 Chemistry by clicking on the link below. KCl03 on heating decomposes to give KCl and 02. (ii) 1 mole of carbon is burnt in 16 g of dioxygen. Free NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry solved by expert teachers from latest edition books and as per NCERT (CBSE) guidelines.Class 11 Chemistry Some basic Concepts of Chemistry NCERT Solutions and Extra Questions with Solutions to help you to revise complete Syllabus and Score More marks. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. 14g of N = 1 gram atom 1 Answer: The digits in a properly recorded measurement are known as significant figures. Answer: (a) Fixing the mass of dinitrogen as 28 g, masses of dioxygen combined will be 32,64, 32 and 80 g in the given four oxides. The stoichiometric coefficients are 1, 3 and 2 respectively. Question 1.1 Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 The cost of table salt (NaCl) and table sugar (C12H22O11) are Rs 1 per kg and Rs 6 per kg respectively.Calculate their cost per mole. This Chapter 2 talks about: Daltonian Concept of the atom; ... Are you looking for Class 11 Chemistry Notes for FBISE? Convert 2.6 minutes in seconds. Here you can get Class 11 Important Questions Chemistry based on NCERT Text book for Class XI. it may help u, i love these group and i want to knw better, sir, can i have the solutions for this questions. This is because each proton and each neutron weigh one atomic mass unit (amu). Question 1. Calculation of simplest whole number ratios of the elements. Question 9. Answer: Question 4. We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the … Chemistry Class 11 Important Questions are very helpful to score high marks in board exams.Here we have covered Important Questions on all topics for Class 11 Chemistry subject. Move to Top of the page. The empirical formula of the compound = C3H4O4. Thus, 2 volumes of H2 react with 1 volume of 02 to produce 2 volumes of water vapour. Calcium carbonate reacts with aqueous HCl according to the reaction. Question 3. Now that you are provided all the necessary information regarding CBSE Class 11 Chemistry Worksheet and we hope this detailed article is helpful. (i) H20(ii) C02(iii) CH4, Answer:  (i) Molecular mass of H2O = 2(1.008 amu) + 16.00 amu=18.016 amu Answer: (i) 1 mole of C2H6 contains 2 moles of carbon atoms (iv) 5 mol A + 2.5 mol B Multiple choice questions help to develop understanding of all key points of chapter. Practicing these The Browning Version Class 11 English MCQs Questions with Answers really effective to improve your basics and learn all … Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation:(i) N2 (g) + 3H2(g) —–> 2NH3 (g) The answers of CBSE NCERT Class 11 Chemistry are prepared by the top academic experts of Embibe. (iii) In the given addition, the least number of decimal places in the term is 4. Long Answer Type Questions Question 12. (iii) 2 moles of carbon are burnt in 16 g of dioxygen. Define the term ‘unit’ of measurement. Calculate the concentration of nitric acid in moles per litre in a sample which has a density 1.41 g mL-1 and the mass percent of nitric acid in it is being 69%. (iii) 100 atoms of A + 100 molecules ofB (ii) 2 mol A + 3 mol B (i) 1 mole of carbon is burnt in air. Click here to learn about the solutions for Chapter 1 – Some Basic Concepts of Chemistry. Question 9.Calculate the atomic mass (average) of chlorine using the following data: (a) Mass of 2.5 gram atoms of magnesium, To calculate mass of HCl in 25 mL of 0.75 m HCl They will find all type of questions like short answer, long answer type question, assertion and reasoning questions. Answer: Question 10.In three moles of ethane (C2H6), calculate the following: (ii) Skill of the person making the measurement. (b) Gram atom in 1.4 grams of nitrogen (Atomic mass Mg = 24, N = 14) What is one a.m.u. Also Access CBSE Class 11 chemistry Sample Papers . Question 3. Express the following up to four significant figures. Students can find the Important Questions of Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry compiled here on this page. (iii) No limiting reagent. How many significant figures are present in the following? For example, N2(g) + 3H2(g) ———–> 2 NH3(g) how to calculate the atomic mass of isotopes? 1) General Organic Chemistry (generally questions about resonance, I effect, hyper-conjugation, acidity order) (b) Cost of table sugar (C12H22O11) per mole Answer:  Molecular mass of oxygen = 32 u. ##check##Chapter 1 ; Content: Short and Long Answers | Solved Exercises | MCQs [Preview PDF Online ##eye##] [Direct Download PDF ##download##] Chapter 2 - Atomic structure. Answer:  Step I. Download MCQs for Class 11 Chemistry for important topics for all chapters in Class 11 Chemistry based on CBSE and NCERT pattern. 11th Class Chemistry Chapter 5 Atomic Structure Short Question Answers Below 1.Which observations tell the presence of cathode rays in the discharge tube? 1.4g of N = 1/14 x 1.4 = 0.1 gram atom. Question 27. .•. Calculate the quantity of NaCl in 10 mL of the solution. At an intermediate level, it is not so easy. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. Calculate the mass percent of different elements present in sodium sulphate (Na2 SO4). Question 33. 2.5 gram atoms of Mg = 24 x 2.5 = 60g Answer: Question 19. What is the concentration of sugar (C12H22O11) in mol L -1 if its 20 g are dissolved in enough water to make a final volume up to 2 L? Your email address will not be published. How many oxygen atoms are there in 18 g of water? How much copper can be obtained from 100 g of copper sulphate (CuSO4 )? Answer: 1 mole of Mn02, i.e., 55 + 32 = 87 g Mn02 react with 4 moles of HCl, i.e., 4 x 36.5 g = 146 g of HCl. Conversion factor =60 s/(1min) Answer: Equal volumes of all gases under the conditions of same temperature and pressure contain the same number of molecules. See Q3. or one ‘u’? 911803 students using this for Class 11 preparation. Class 11 Chemistry Chapter 12 Organic Chemistry Some Basic Principles And Techniques Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. unit of pressure, pascal, is as shown below:1 Pa = 1 Nm-2.If mass of air at sea level is 1034 g cm-2,calculate the pressure in pascal. Chapter Wise Important Questions Class 11 Chemistry. Calculate the amount of carbon dioxide that could be produced when Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. Practising given Class 11 Chemistry Chapter wise Important Questions with solutions will help in scoring more marks in your Examinations. Required fields are marked *. What is the volume of 02 at N.T.P liberated by 0.1 mole of KCl03? These’are in the ratio 1 : 2 : 1 : 5 which is a simple whole number ratio. Molality of a solution does not depend on temperature. Number of C02molecules in 11.2 litres. Hence, the answer should have 4 significant. Answer: It is defined as the standard of reference chosen to measure a physical quantity. II. Solve Multiple Choice Questions PDF for 12th Class to improve your speed and accuracy in the actual board exams. Its molecular formula is C6H12O6, while empirical formula is CH2O. Hence,C0, (iii) Here again, dioxygen is the limiting reactant. 1 molecule of ozone (O3) = 3 atoms of oxygen. Writing the empirical formula of the compound. Short Answer Type Questions The simplest whole number ratios of the different elements are: C:H:O::3:4:4 Answer: H2 and 02 react according to the equation. Answer: This is due to the presence of dust particles. 3 moles of C2H6 will C-atoms = 6 moles III. Chemistry MCQ Questions for Class 12 Chapterwise with Answers is made available for students adhering to the latest syllabus guidelines. 1000 mL of 0.75 M HCl contain HCl = 0.75 mol = 0.75 x 36.5 g = 24.375 g Answer: Question 34. MCQ Questions for Class 11 English with Answers were prepared according to the latest question paper pattern. .•. Question 7. Answer:  1 mole of CuS04 contains 1 mole (1 g atom) of Cu, Molar mass of CuS04= 63.5 + 32 + 4 x 16 = 159.5 g mol-1, Thus, Cu that can be obtained from 159.5 g of CuS04 = 63.5 g. Question 8. Answer: The chemical equation for the reaction is: Question 4. Topics and Subtopics in NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry: NCERT Solutions Class 11 ChemistryChemistry Lab ManualChemistry Sample Papers, Question 1. Step II. Calculate the molecular mass of the following: The Vapour Density of a gaseous element is 5 times that of oxygen under similar conditions. This document is highly rated by Class 11 students and has been viewed 35935 times. Question 21. unit of mass? Question 6. Question 11. (v) 500.0 (vi) 2.0034 (ii) Leaving the exact number (5), the second term has 4 significant figures. Match the following prefixes with their multiples: We hope the Kerala Plus One Chemistry Chapter Wise Questions and Answers Chapter 1 Some Basic Concepts of Chemistry help you. Question 2. (ii) According to the given reaction, 1 mol of A reacts with 1 mol of B Name two factors that introduce uncertainty into measured figures. 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