This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 2 CO (g) + O$_{2}$(g) $\rightarrow$ 2 CO$_{2}$ (g) In the formation of CO$_{2}$ from CO and oxygen, how many Liters of CO$_{2}$ are produced by the reaction of 8 mols of O$_{2}$ with an excess of carbon monoxide? A) 0.178 L. B) 358.4 Liters. C) 704 grams. D) 0.36 grams. Show Answer Correct Answer: B) 358.4 Liters. 2. Empirical formula of C$_{6}$H$_{12}$O$_{6}$ is A) C$_{6}$H$_{12}$O$_{6}$. B) CH$_{2}$O. C) C$_{3}$H$_{6}$O$_{3}$. D) CHO. Show Answer Correct Answer: B) CH$_{2}$O. 3. How many significant figures are there? 0.000008 A) 1. B) 2. C) 6. D) 7. Show Answer Correct Answer: A) 1. 4. A welding fuel gas contains carbon and hydrogen only. Burning a sample produces 3.38 g CO2 and 0.690 g H2O, total gas weighs 11.6 g in 10 L at STP. The empirical formula of the gas is: A) CH4. B) C2H2. C) C3H8. D) C2H6. Show Answer Correct Answer: B) C2H2. 5. G of pure calcium carbonate was found to require 50 mL of dilute HCl for complete reactions. The strength of the HCl solution is given by: A) 4 N. B) 2 N. C) 0.4 N. D) 0.2 N. Show Answer Correct Answer: C) 0.4 N. 6. The chemical name for Nitric oxide (NO) is: A) Nitrogen peroxide. B) Nitrogen Monoxide. C) Dinitrogen oxide. D) None of the above. Show Answer Correct Answer: B) Nitrogen Monoxide. 7. What is the definition for Avogadro's number? A) Number of grams per one mole of a substance. B) Whole number ratio that is a multiple of a chemical formula. C) Simplest, whole number ratio of a chemical formula. D) 6.02 x 10$^{23}$ particles per one mole of a substance. Show Answer Correct Answer: D) 6.02 x 10$^{23}$ particles per one mole of a substance. 8. A measurement which on repetition gives same or nearly same result iscalled A) Accurate measurement. B) Average measurement. C) Precise measurement. D) Estimated measurement. Show Answer Correct Answer: C) Precise measurement. 9. Calculate the molecular mass of sodium chloride A) 60 u. B) 58 u. C) 20 u. D) None of the above. Show Answer Correct Answer: B) 58 u. 10. One atomic mass unit (amu) is closest to the mass of: A) The oxygen-16 nucleus. B) The carbon-12 nucleus. C) 6.022 x 10$^{23 }$atoms of hydrogen. D) One proton. Show Answer Correct Answer: D) One proton. 11. What type of bond is formed when atoms share electrons? A) Covalent. B) Ionic. C) Hydrogen. D) Polyatomic. Show Answer Correct Answer: A) Covalent. 12. Chemistry is a branch of study which does not deals with ..... of matter. A) Preparation. B) Composition. C) Structure. D) None of the above is correct answer. Show Answer Correct Answer: D) None of the above is correct answer. 13. Atomic mass of boron is 10.81. It has two isotopes with 80% and 20% abundance respectively. The atomic mass of the isotope having 80% abundance is 11.01. The atomic mass of the other isotope is: A) 10.80. B) 11.01. C) 10.01. D) 21.82. Show Answer Correct Answer: C) 10.01. 14. Oxidation no. of alkaline earth metals is ..... A) +1. B) -1. C) -2. D) +2. Show Answer Correct Answer: D) +2. 15. Which of these has the greatest volume at the same temperature & pressure? A) 1 mole CO$_{2 }$gas. B) 1 mole of N$_{2}$O$_{4 }$gas. C) 1 mole of C$_{3}$H$_{8}$ gas. D) They all have the same volume. Show Answer Correct Answer: D) They all have the same volume. 16. Which one of the following pair of substances illustrates law of multiple proportions? A) CO, CO 2. B) NaCl, NaBr. C) H2O, D2O. D) MgO, Mg (OH) 2. Show Answer Correct Answer: A) CO, CO 2. 17. Which of the following are chemical properties?Basicity, Melting point, Reactivity, Boiling point, Colour, Odour, Combustability, Density, Mass, Acidity and Toxicity A) 6. B) 11. C) 8. D) 5. Show Answer Correct Answer: D) 5. 18. Which kind of mixture is seperable? A) HOMOGENOUS. B) HETEROGENOUS. C) None of the above. D) All of the above. Show Answer Correct Answer: D) All of the above. 19. How many atoms are present in 46 u of Na A) 46. B) 23. C) 1. D) 2. Show Answer Correct Answer: D) 2. 20. State the possible valencies for Iron: A) 1 and 2. B) 2 and 3. C) 4 and 2. D) 3 and 5. Show Answer Correct Answer: B) 2 and 3. 21. A jug contains 2 L of milk. The volume of milk in m$^{3}$ is: A) 0.02. B) 2. C) 0.002. D) 0.0002. Show Answer Correct Answer: C) 0.002. 22. The weight of iron which will be converted into its oxide (Fe$_{3}$O$_{4}$) by the action of 14.4 g of steam on it is: A) 33.6 g. B) 12 g. C) 28.8 g. D) 7.2 g. Show Answer Correct Answer: A) 33.6 g. 23. Which of the following contains highest number of moles of the substance in it A) 90 gm of water. B) 130 gm of carbon dioxide. C) 89.6 liters of oxygen at S.T.P. D) 12 gm of dihydrogen. Show Answer Correct Answer: D) 12 gm of dihydrogen. 24. Density of water A) 1 kg/L. B) 1 g/mL. C) 1 kg/m$^{3}$. D) Both 1 and 2. Show Answer Correct Answer: D) Both 1 and 2. 25. 16 amu is the mass of one atom A) Nitrogen. B) Phosphorus. C) Oxygen. D) Sulphur. Show Answer Correct Answer: C) Oxygen. ← PreviousNext →Related QuizzesClass 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 1Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 2Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 3Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 4Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 5Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 6Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 7Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 8Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 10Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books