This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Nx molar mass = mass(m) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. The chemical formula for Magnesium Nitride is: A) MnN$_{2}$. B) (Mg)$_{2}$NO$_{3}$. C) MgNO$_{4}$. D) Mg$_{3}$N$_{2}$. Show Answer Correct Answer: D) Mg$_{3}$N$_{2}$. 3. Which of the following cannot be represented by resonance structures? A) Dimethyl ether. B) Nitrate anion. C) Carboxylate anion. D) Toluene. Show Answer Correct Answer: A) Dimethyl ether. 4. The displacement of electrons in a multiple bond in the presence of attacking reagent is called A) Hyper conjugation. B) Resonance. C) Electromeric effect. D) Inductive effect. Show Answer Correct Answer: C) Electromeric effect. 5. If atomic mass of carbon was taken as 100 u, then the value of Avogadro's number would be: A) 5.01 X 10$^{24}$ Atoms. B) 6.023 X 10$^{23 }$ Atoms. C) 12.046 X 10$^{23}$ atoms. D) None of the above. Show Answer Correct Answer: A) 5.01 X 10$^{24}$ Atoms. 6. Which of following intermediate is neutral A) 3. B) Carbocation. C) Carbanion. D) Carbenes. E) Carbon freeradical. Show Answer Correct Answer: E) Carbon freeradical. 7. Which of the following is SI unit of volume A) Cm$^{3}$. B) M$^{3}$. C) L. D) ML. Show Answer Correct Answer: B) M$^{3}$. 8. A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula? A) MgN. B) Mg$_{3}$N$_{2 }$. C) MgN$_{2}$. D) Mg$_{4}$N$_{3}$. Show Answer Correct Answer: B) Mg$_{3}$N$_{2 }$. 9. For which of the following molecule molecular mass can be calculated instead from its formula mass? A) SO2. B) NaBr. C) CaCl2. D) KI. Show Answer Correct Answer: A) SO2. 10. The highest temperature among the following is A) 203$^{o}$ F. B) 278 K. C) 105$^{o}$ C. D) All are equal. Show Answer Correct Answer: C) 105$^{o}$ C. 11. Distance travelled by light in 2.00 ns (speed = $3.0 x 10^8 m/s$ A) 0.5 m. B) 0.7 m. C) 0.8 m. D) 0.6 m. Show Answer Correct Answer: D) 0.6 m. 12. Molar mass is the mass of A) One atom. B) One molecule. C) 1 g. D) One mole. Show Answer Correct Answer: D) One mole. 13. Which of the folowing concentration term is affected by temperature A) Molarity. B) Molality. C) Molefraction. D) None of these. Show Answer Correct Answer: A) Molarity. 14. What is the valency of lead? A) 5, 7. B) 1, 2. C) 2, 4. D) 1, 4. Show Answer Correct Answer: C) 2, 4. 15. Short hand representation for the atom of a specific element A) Element. B) Atom. C) Symbol. D) None of the above. Show Answer Correct Answer: C) Symbol. 16. Volume occupied by 1 mole of any gaseous substance at 273 K and 1 atm pressure is ..... A) 22.71 litres. B) 22.4 litres. C) 24.5 litres. D) None of the above. Show Answer Correct Answer: B) 22.4 litres. 17. The molecular mass of glucose (C6H12O6) is approximately: A) 160 u. B) 120 u. C) 150 u. D) 180 u. Show Answer Correct Answer: D) 180 u. 18. How many grams of HCl react with 5.0 g MnO2 in:4HCl + MnO2 $\rightarrow$ 2H2O + MnCl2 + Cl2 A) 3.08 g. B) 12.32 g. C) 9.24 g. D) 6.16 g. Show Answer Correct Answer: D) 6.16 g. 19. Positive charge of carbocations can be dispersed by ..... A) (+I) effect of alkyl group. B) Resonance in allyl or benzyl carbocation. C) Hyperconjugation in 10, 20 and 30 carbocations. D) All of the mentioned. Show Answer Correct Answer: D) All of the mentioned. 20. Volume / 22.4 litres = n (no of moles) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. Which of the following has the maximum number of unpaired d-electrons? A) Fe$^{2+}$. B) Ni$^{3+}$. C) Cu$^{+}$. D) Zn$^{2+}$. Show Answer Correct Answer: A) Fe$^{2+}$. 22. Molar volume is defined as the volume occupied by 2 mole of an ideal gas at STP A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. True or False:Law of conservation of energy states that matter can neither be created nor destroyed A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 24. Which out of these is a rare gas? A) Hydrogen. B) Boron. C) Silicon. D) Argon. Show Answer Correct Answer: D) Argon. 25. Which one of the following pairs of compounds illustrate the law of multiple proportions? A) (a) H2O and Na2O. B) (b) MgO and Na2O. C) (c) Na2O and BaO. D) D) SnCl2 and SnCl4. Show Answer Correct Answer: D) D) SnCl2 and SnCl4. 26. Mass percentage of carbon in CO$_{2 is}$ A) 33%. B) 27%. C) 40%. D) 50%. Show Answer Correct Answer: B) 27%. 27. Equivalent mass of a reducing agent = Molar mass of reducing agent /? A) No.of electrons gained by 1 mole. B) No.of electrons lost by 1 mole. C) All the above. D) None of the above. Show Answer Correct Answer: B) No.of electrons lost by 1 mole. 28. A molecule is formed when two or more ..... chemically join together. A) Solutions. B) Atoms. C) Compounds. D) Mixtures. Show Answer Correct Answer: B) Atoms. 29. Electronegativity is ..... A) The ability of an atom to attract/ accept electrons. B) The ability of an atom to lose electrons. C) The energy required to remove an electron from a specific atom. D) How easy it is to make friends. Show Answer Correct Answer: A) The ability of an atom to attract/ accept electrons. 30. Application of chemistry includesA.MedicineB. AgricultureC. IndustriesD. Food E. Daily purposes A) A, B, D, E. B) B, C, D, E. C) A, B, C, D, E. D) None of the options are correct. Show Answer Correct Answer: C) A, B, C, D, E. 31. The molecular formula for Nitric acid A) HNO$_{3}$. B) HNO$_{2}$. C) HNO. D) None of the above. Show Answer Correct Answer: A) HNO$_{3}$. 32. Covert 7 m to inches A) 276. B) 2.54. C) 210. D) 200. Show Answer Correct Answer: A) 276. 33. The prefix for the multiple 10$^{-9}$ is A) A) nano. B) (b) peta. C) C) atto. D) (d) all of these. Show Answer Correct Answer: A) A) nano. 34. An Avogadro's number of water molecules is equal to all EXCEPT ..... A) 1 mole of water molecules. B) 2 moles of Hydrogen atoms and 1 mole of oxygen atoms. C) 18 grams of water. D) 18 molecules of water. Show Answer Correct Answer: D) 18 molecules of water. 35. Which of the following is an element? A) Diamond. B) Ozone. C) Graphite. D) Silica. Show Answer Correct Answer: D) Silica. 36. Which of the following is a homogenous mixture? A) Sugar dissolved in water. B) Baked beans. C) Chocolate chip ice cream. D) Chicken noodle soup. Show Answer Correct Answer: A) Sugar dissolved in water. 37. SI unit of density A) Kg/dm$^{3}$. B) G/mL. C) Kg/L. D) Kg/m$^{3}$. Show Answer Correct Answer: D) Kg/m$^{3}$. 38. Nitrate ion contains A) Nitrogen and oxygen. B) Nitrogen only. C) Nitrogen, hydrogen and oxygen. D) Sodium and nitrogen. Show Answer Correct Answer: A) Nitrogen and oxygen. 39. Given below are the quantum numbers for 4 electrons.A. n=3, 1=2, m1=1, ms=+1/2B. n=4, 1=1, m1=0, ms=+1/2C. n=4, 1=2, m1=-2, ms=-1/2D. n=3, 1=1, m1=-1, ms=+1/2The correct order of increasing energy is A) D B) B C) D D) B Show Answer Correct Answer: C) D 40. In correct position tell first ten elements A) H, He, Li, Be, B, C, N, O, F, Ne. B) H, He, Li, Be, B, C, N, O, F, Na. C) H, He, Li, B, Be, C, N, O, F, Ne. D) All are correct. Show Answer Correct Answer: A) H, He, Li, Be, B, C, N, O, F, Ne. 41. Ba$_{3}$(PO$_{4}$)$_{2}$ A) Barium phosphate. B) Barium phosphide. C) Phosphoric acid. D) Barium phosphite. Show Answer Correct Answer: A) Barium phosphate. 42. On the Paulings electro negativity scale the element next to F is ..... ? A) N. B) Cl. C) O. D) Ne. Show Answer Correct Answer: C) O. 43. Which of the following element has least number of electrons in its M-shell? A) K. B) Ni. C) Mn. D) Sc. Show Answer Correct Answer: A) K. 44. What are Intensive properties? A) Properties dependent on the amount of matter present. B) Volume. C) Weight. D) Properties independent of the amount of matter present. Show Answer Correct Answer: D) Properties independent of the amount of matter present. 45. Which of the following is alkyne? A) C$_{5}$H$_{12}$. B) C$_{6}$H$_{12}$. C) C$_{4}$H$_{8}$. D) C$_{2}$H$_{2}$. Show Answer Correct Answer: D) C$_{2}$H$_{2}$. 46. The volume of 1.7g of NH3 at STP (273K, 1atm) is A) 3.4L. B) 2.24L. C) 1.7L. D) 2.8L. Show Answer Correct Answer: B) 2.24L. 47. If law of conservation of mass was to hold true, then 20.8 g of BaCl 2 on reaction with 9.8 g of Sulphuric acid will produce 7.3 g of HCl and Barium Sulphate equal to A) 11.65 g. B) 25.5 g. C) 23.3 g. D) 30.6 g. Show Answer Correct Answer: C) 23.3 g. 48. How many seconds are there in 22hours?1. 11 x 72002. 22 x 36003. 11x 720004. 22 x 360005. 792006.7920Choose the correct calculations only A) 1, 4, 6. B) 1, 2, 3, 4, 5. C) 1, 3, 5. D) 1, 2, 5. Show Answer Correct Answer: D) 1, 2, 5. 49. Which of the following pairs has both members from thesame period of the periodic table. A) Cl-Br. B) Na-Ca. C) Na-Cl. D) Ca-Cl. Show Answer Correct Answer: C) Na-Cl. 50. Round 34.216 to three significant figures: A) 34.21. B) 34.22. C) 34.3. D) 34.2. Show Answer Correct Answer: D) 34.2. 51. Nanometer stands for A) 10$^{+9}$m. B) 10$^{+5}$m. C) 10$^{-9}$ m. D) 10$^{-5}$ m. Show Answer Correct Answer: C) 10$^{-9}$ m. 52. The oxidation number of Na is A) 2. B) 0. C) 1. D) -1. Show Answer Correct Answer: B) 0. 53. Volume is the space occupied by a substance. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 54. The sub-shell with n=6, l=2 can accomodate a maximum of A) 10 electrons. B) 12 electrons. C) 72 electrons. D) 36 electrons. Show Answer Correct Answer: A) 10 electrons. 55. H mass of C$_{12}$ atom A) 1 amu. B) 1 u. C) 1 da. D) All of these. Show Answer Correct Answer: D) All of these. 56. Number of atoms in 52u of He are: A) 4. B) 5000. C) 20. D) 13. Show Answer Correct Answer: D) 13. 57. Which out of these will form an anion? A) Iron. B) Nickel. C) Ammonium. D) Chlorine. Show Answer Correct Answer: D) Chlorine. 58. The elements with atomic numbers 9, 17, 35, 53, 85 are called A) Light metals. B) Noble gases. C) Halogens. D) Heavy metals. Show Answer Correct Answer: C) Halogens. 59. How many grams are in 1.2 x 10$^{24}$ molecules of CO? (molar mass of CO = 28 g/mol) A) 55.8 g. B) 1.2 g. C) 28.2 g. D) 6.02 g. Show Answer Correct Answer: A) 55.8 g. 60. The quantum of light is A) Photon. B) Proton. C) Electron. D) Neutron. Show Answer Correct Answer: A) Photon. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books