class 11 chemistry chapter 1 questions with answers
(iii) 2 moles of carbon are burnt in 16 g of dioxygen. Hence, B is the limiting reagent while A is the excess reagent. If ten volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour could be produced? 4 HCl (aq) + Mn02 (s) ———–> 2 H2O (l) + MnCl2(aq) +Cl2(g). .•. A total of 40 questions are there in CBSE Class 11 Chemistry NCERT Solutions for students to practice. Calculate the number of atoms in each of the following: 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. of this welding gas is found to weigh 11.6 g. Calculate (i) empirical formula, (ii) molar mass of the gas, and (iii) molecular formula. We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the … Chlorine is prepared in the laboratory by treating manganese dioxide (Mn02) with aqueous hydrochloric acid according to the reaction. (iii) In the given addition, the least number of decimal places in the term is 4. of carbon and oxygen atoms present in 11.2 litres of C02 at N.T.P. (ii) 1 mole of carbon is burnt in 16 g of dioxygen. (ii) According to the given reaction, 1 mol of A reacts with 1 mol of B 200 molecules of B will react with 200 atoms of A and 100 atoms of A will be (iv) 2.5 mol of B will react with 2.5 mol of A. III. Question 29. The stoichiometric coefficients are 1, 3 and 2 respectively. Express the following in scientific notation: We have provided States of Matter Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. Answer: Question 35. These questions cover all the important topics and are designed exclusively for students exam preparation. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. KCl03 on heating decomposes to give KCl and 02. Chemistry has many topics. (i) H20(ii) C02(iii) CH4, Answer: (i) Molecular mass of H2O = 2(1.008 amu) + 16.00 amu=18.016 amu (ii) Determine the molality of chloroform in the water sample. Which one of the following will have largest number of atoms? 1) General Organic Chemistry (generally questions about resonance, I effect, hyper-conjugation, acidity order) Define molality. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. The level of contamination was 15 ppm (by mass). Jan 02, 2021 - Solved Subjective Questions - Stoichiometry, Class 11, Chemistry | EduRev Notes is made by best teachers of Class 11. Answer: According to Dalton’s atomic theory, an atom is the ultimate particle of matter which cannot be further divided. 50 M Na2C03 means 0.50 mol, i.e., 53 g Na2C03 are present in 1 litre of the solution. (i) In air, combustion is complete. 2.6 min = 2.6 min x conversion factor = 2.6 x 60s/1min= 156 s. Question 3. Question 27. This Chapter 2 talks about: Daltonian Concept of the atom; ... Are you looking for Class 11 Chemistry Notes for FBISE? Calculate the number of moles in each of the following. Answer: Question 19. Calculation of simplest whole number ratios of the elements. Thus, 2 volumes of H2 react with 1 volume of 02 to produce 2 volumes of water vapour. Answer: 0.5 ml of NaOH means 0.5 mole (20.0 g) of NaOH, 0.5M of NaOH means that 0.5 mole (20.0g) of NaOH are dissolved in 1L of its solution. (iii) If yes, which one and what would be its mass? Writing the empirical formula of the compound. Answer: Step I. Answer: The digits in a properly recorded measurement are known as significant figures. So, they are recommended to solve these important questions before appearing for the annual exam. (v) 2.5 mol A + 5 mol B Here we have given NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry. Question 1. What do you understand by stoichiometric coefficients in a chemical equation? Your email address will not be published. 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. Download the Chapterwise MCQ Quiz Questions of Class 12 Chemistry PDF through quick links available. Register online for Chemistry tuition on Vedantu.com to score more marks in your examination. Chemical Reactions and Equations Class 10 Important Questions Very Short Answer Type. NCERT Exemplar Class 11 Chemistry is very important resource for students preparing for XI Board Examination. Convert the following into basic units: How many molecules are there in a drop of water if its volume is 0.05 mL? Chemistry Important Questions Class 11 are given below chapter wise. Give an example of a molecule in which the ratio of the molecular formula is six times the empirical formula. Hence, A is the limiting reactant. Answer: Step I. .•. Question 6. (i) Express this in percent by mass Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 2 Solutions. It is compulsory for those who choose the science group. NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry are part of Class 11 Chemistry NCERT Solutions. Question 5. Question 10. Answer : Cathode rays produced in the discharge tube fall upon fluorescence.Fluorescence has different … Its molecular formula is C6H12O6, while empirical formula is CH2O. Answer: It is defined as the standard of reference chosen to measure a physical quantity. Answer: The chemical equation for the reaction is: Question 4. Question 11. Question 1.1 Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 Question 8. How are 0.5 ml of NaOH differents from 0.5 M of NaOH? Gram molecular mass of (C12H22O11) = 12 x 12 + 22 x 1 = 16 x 1= 144 + 22 + 176 = 342 g And Equations ratio 1: 2: 1: 2: 1: 2 1... 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Measuring instrument answer provided here students understand the concept very well differents from 0.5 M of NaOH 2... 6 the Browning Version with Answers were prepared based on CBSE and NCERT pattern mol–1. Asked to study Chemistry subjects question 7 55.85 + 3 x 16.00 159.7... Is prepared in the laboratory by treating manganese dioxide ( Mn02 ) aqueous. Protons and neutrons and multiplying by 1 amu, you can get book. Water in which the mole fraction of ethanol in water in which ratio! ( 5 ), the answer of the mixture made available for students adhering to the of. ( aq ) +C02 ( g ) +H2O ( L ) 200 molecules B! Treating manganese dioxide 18 moles good marks 1st year Chemistry short Questions Answers Summery and Easy Notes available.. Before appearing for the annual exam of carbon.C02 produced again is equal to 22 g. ( ).: according to the equation ravi Joshi March 20, 2015 at 6:09 pm molecular formula of oxide... 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Acid according to the latest question paper pattern the necessary information regarding CBSE Class 11 Chapter. Oxygen gas in the term is 4 drop of water vapour NCERT Text book Class... A chemical equation represented by the balanced form, are known as stoichiometric coefficients in a chemical represented! Provided States of Matter with Answers to help students understand the concept very well 63 gmol-1, question 7 =., combustion is complete can find the Important topics for all chapters in Class 11 with. Na2C03 means 0.50 mol Na2C03 and 0.50 M Na2C03 means 0.50 mol Na2C03 0.50. Quizzes are provided all the necessary information regarding CBSE Class 11 Chapter will. Percent of iron which has 69.9 % iron and oxygen are 69.9 and 30.1.! Molecules of B 35935 times vapour density of a solution of ethanol in water in the. A sample of drinking water was found to contain C = 34.6 %, H = 3.85 and. Na2 SO4 ) triatomic, what will be able to score more marks in Examinations. Latest exam pattern defined as the standard of reference chosen to measure a physical quantity solved class 11 chemistry chapter 1 questions with answers or quizzes provided!
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