This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Choose the number of atoms present in 1mole of He A) 6.022 X 10$^{19}$. B) 6.022 X 10$^{20}$. C) 6.022 X 10$^{21}$. D) 6.022 X 10$^{23}$. Show Answer Correct Answer: D) 6.022 X 10$^{23}$. 2. Subatomic particles with a positive charge A) Neutrons. B) Atomic mass. C) Protons. D) Isotopes. Show Answer Correct Answer: C) Protons. 3. What vol of air is needed for complete combustion of 32g methane A) 2*22.4l. B) 4*22.4l. C) 20*22.4l. D) 22.4l. Show Answer Correct Answer: C) 20*22.4l. 4. Kg is A) 100 g. B) 10 g. C) 1000 g. D) 0.01 g. Show Answer Correct Answer: A) 100 g. 5. 16 g of oxygen has same number of molecules as in [atomic mass of O=16, C=12, N=14, H=1] A) 16 g of CO. B) 28 g of N$_{2}$. C) 14 g of N$_{2}$. D) 1.0 g of H$_{2}$. Show Answer Correct Answer: B) 28 g of N$_{2}$. 6. Using isotope data, the average atomic mass of chlorine is approximately: A) 34.97 u. B) 35.45 u. C) 36.97 u. D) 37.23 u. Show Answer Correct Answer: B) 35.45 u. 7. Match the prefix "micro" with its correct multiple: A) $10^6$. B) $10^9$. C) $10^{-6}$. D) $10^{-15}$. Show Answer Correct Answer: C) $10^{-6}$. 8. Homogeneous Mixture is formed by mixing ..... A) Phenol and Water. B) Iron filing and sand. C) Silver chloride and ethanol. D) Ethanol and water. Show Answer Correct Answer: D) Ethanol and water. 9. Molecular mass of water is A) 18u. B) 16u. C) 20u. D) None of the above. Show Answer Correct Answer: A) 18u. 10. How many moles of hydrogen is required to produce 10 moles of ammonia? A) 15 moles of hydrogen. B) 30 moles of hydrogen. C) 45 moles of hydrogen. D) 60 moles of hydrogen. Show Answer Correct Answer: A) 15 moles of hydrogen. 11. 1 mole is equal to A) 22.2 L at stp. B) 22.4 L at stp. C) 20 L at stp. D) None of the above. Show Answer Correct Answer: B) 22.4 L at stp. 12. Which is NOT a postulate of Dalton's atomic theory? A) Atoms are indivisible. B) Atoms of the same element have identical masses. C) Atoms combine in varying ratios to form compounds. D) Atoms are created or destroyed in reactions. Show Answer Correct Answer: D) Atoms are created or destroyed in reactions. 13. Which one of the following is not a mixture? A) Brass. B) Air. C) 22 Carat gold. D) Water. Show Answer Correct Answer: D) Water. 14. What is oxidation number of H in CaH$_{2}$? A) +1. B) -1. C) 0. D) +2. Show Answer Correct Answer: B) -1. 15. Calculate the mass of 2.5 gram atoms of oxygen. A) 50.0g. B) 70.0g. C) 9.6. D) None of these. Show Answer Correct Answer: D) None of these. 16. The empirical formulae for sucrose C12H22O11 A) CH2O. B) C6H11O11. C) C12H22O11. D) C2HO. Show Answer Correct Answer: C) C12H22O11. 17. A molal solution is one that contains one mole of a solute in4a)1000 g of the solventb)one litre of the solventc)one litre of the solutiond)22.4 litres of the solution A) 1000 g of the solvent. B) One litre of the solvent. C) One litre of the solution. D) 22.4 litres of the solution. Show Answer Correct Answer: A) 1000 g of the solvent. 18. Oxidation no. of a free element is ..... A) 0. B) 1. C) +1. D) None of the above. Show Answer Correct Answer: A) 0. 19. Oxidation no. of Flourine is ..... A) 0. B) +1. C) -1. D) None of the above. Show Answer Correct Answer: C) -1. 20. Number of moles of water in 1 liter of water with dencity 1 g/cc are A) 55.56. B) 45.56. C) 56.55. D) 56.45. Show Answer Correct Answer: A) 55.56. 21. 25 mL of a solution of barium hydroxide on titration with 0.1 M solution of HCl gave a titre value of 35 mL. The molarity of BaOH2 is: A) 0.28. B) 0.35. C) 0.07. D) 0.14. Show Answer Correct Answer: D) 0.14. 22. The mass of 11.2 L of ammonia gas at STP is A) 8.5 g. B) 85 g. C) 17 g. D) 1.7 g. Show Answer Correct Answer: A) 8.5 g. 23. Molecule is the smallest particle of A) Compound. B) Substance. C) Mixture. D) Element. Show Answer Correct Answer: A) Compound. 24. Calculate the number of moles in 89.6 L of hydrogen gas A) 2 mol. B) 4 mol. C) 3 mol. D) None of the above. Show Answer Correct Answer: B) 4 mol. 25. Isobars are A) Elements which have same atomic number but different mass number. B) Elements having same mass number but different atomic number. C) Elements that are having the same number of neutrons. D) None of these are true. Show Answer Correct Answer: B) Elements having same mass number but different atomic number. ← 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 9Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books