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 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1:4.The ratio of number of their moles is A) 7:32. B) 3:16. C) 1:81. D) 1:4. Show Answer Correct Answer: A) 7:32. 2. What is a functional group? A) Group of molecules that give specific characteristics to an atom. B) Group of molecules that make up a group of atoms. C) Group of atoms that give specific characteristics to an element. D) Atoms or group of atoms that give specific characteristics to a molecule. Show Answer Correct Answer: D) Atoms or group of atoms that give specific characteristics to a molecule. 3. How much water is produced by complete combustion of 16g methane (CH4)? A) 18 g. B) 22 g. C) 44 g. D) 36 g. Show Answer Correct Answer: D) 36 g. 4. What do we call the chemistry unit to quantify the amount of a substance? A) Kilogram. B) Mole. C) Particles. D) Liter. Show Answer Correct Answer: B) Mole. 5. What is the concentration of nitrate ions if equal volumes of 0.1 MAgNO$_{3}$ and 0.1 M NaCl are mixed together A) 0.05 M. B) 0.1 M. C) 0.2 M. D) 0.25 M. Show Answer Correct Answer: A) 0.05 M. 6. Alkene +? $\rightarrow$ alcohol A) Water. B) Oxygen. C) Hydrogen. D) Carbon dioixde. Show Answer Correct Answer: A) Water. 7. At what temperature degree celsius and degree fahrenheit are same? A) -273.15. B) There is no such temperature. C) -40. D) None of the above. Show Answer Correct Answer: C) -40. 8. Tons of Fe2O3 containing 20% impurities will give iron by reduction with H2 equal to A) 56 tons. B) 112 tons. C) 160 tons. D) 80 tons. Show Answer Correct Answer: D) 80 tons. 9. Atomic mass of Na A) 24. B) 29. C) 23.5. D) 23. Show Answer Correct Answer: D) 23. 10. Gram molecule of sugar in 547.2 gram are:(Mol. mass of sugar = 342) A) 2.2. B) 342. C) 548. D) 1.6. Show Answer Correct Answer: D) 1.6. 11. Number of moles present in 22.0g of carbondioxide is A) 0.25. B) 22. C) 2. D) 0.5. Show Answer Correct Answer: D) 0.5. 12. The valency of copper in CuO is: A) 3+. B) 2+. C) 1+. D) None of the above. Show Answer Correct Answer: B) 2+. 13. The valency of Chlorine in AlCl$_{3}$ is A) 1. B) 3. C) 2. D) None of the above. Show Answer Correct Answer: A) 1. 14. Which of the following is a Chemical fertilizer? A) Urea. B) Sodium nitrate. C) Ammonium sulphate. D) All of these. Show Answer Correct Answer: D) All of these. 15. Which of the following is not used to measure volume? A) Burette. B) Graduated cylinder. C) Volumetric flask. D) None of these. Show Answer Correct Answer: D) None of these. 16. Which of the following reactions is not correct according to the law ofconservation of mass. A) CH4(g) + 2O2(g) $\rightarrow$ CO2(g) + 2H2O (g). B) P4(s) + 5O2(g)$\rightarrow$ P4O10(s). C) 2Mg(s) + O2(g) $\rightarrow$ 2MgO(s). D) C3H8(g) + O2(g) $\rightarrow$CO2(g) + H2O(g). Show Answer Correct Answer: D) C3H8(g) + O2(g) $\rightarrow$CO2(g) + H2O(g). 17. The maximum number of single covalent bonds held by a carbon atom in organic compound is ..... A) 4. B) 5. C) 3. D) 2. Show Answer Correct Answer: A) 4. 18. If 20.0 g of CaCO3 is treated with 20.0 g of HCl, how many grams of CO2 will be produced? A) 15.6 g. B) 12.05 g. C) 20 g. D) 8.8 g. Show Answer Correct Answer: D) 8.8 g. 19. The number 234, 000 expressed in scientific notation is: A) $2.34\times10^6$. B) $2.34 \times 10^4$. C) $2.34\times10^5$. D) $2.34 \times 10^3$. Show Answer Correct Answer: C) $2.34\times10^5$. 20. The empirical formula and molecular mass of a compound are CH2O and180 g respectively. What will be the molecular formula of the compound? A) C6H12O6. B) HCHO. C) C2H4O2. D) CH3COOH. Show Answer Correct Answer: A) C6H12O6. 21. Which of the following properties generally decreases along a period? A) Ionization Energy. B) Metallic Character. C) Electron Affinity. D) Valency. Show Answer Correct Answer: B) Metallic Character. 22. Zinc sulphate is A) ZnSO$_{4}$. B) Zn$_{2}$SO$_{2}$. C) ZnNO$_{3}$. D) ZnSO$_{3}$. Show Answer Correct Answer: A) ZnSO$_{4}$. 23. 1 mole of Ag reacts completely with 3 moles of HNO3. Calculate the moles of Ag NO3 produced A) 1. B) 2. C) 3. D) 5. Show Answer Correct Answer: A) 1. 24. The number of significant figures in $\pi$ A) 2. B) 3. C) Infinite. D) 1. Show Answer Correct Answer: C) Infinite. 25. The molecular formula for Ammonium carbonate is A) (NH$_{4 }$)$_{2}$CO$_{3}$. B) (NH$_{4}$ )CO$_{3}$. C) (NH$_{4}$ )$_{2}$CO. D) None of the above. Show Answer Correct Answer: A) (NH$_{4 }$)$_{2}$CO$_{3}$. 26. Which is NOT an atomic particle A) Electron. B) Proton. C) Photon. D) Neutron. Show Answer Correct Answer: C) Photon. 27. Which of the following rule is incorrect for signifcant FIgure? A) All zeros between the significant. B) All zero digits are significant . C) Leading zeros which are present to the left of the. D) For a number, without decimal point, the zeros after nonzero digit are not significant. e.g. 65400 has threesignificant figures. Show Answer Correct Answer: B) All zero digits are significant . 28. Calculate the molecular mass of acetone (CH$_{3}$COCH$_{3}$ ) A) 46 g mol$^{-1}$. B) 64 g mol$^{-1}$. C) 58 g mol$^{-1}$. D) 62 g mol$^{-1}$. Show Answer Correct Answer: C) 58 g mol$^{-1}$. 29. Which of these elements has 3 valence electrons A) Aluminum. B) Oxygen. C) Helium. D) Sodium. Show Answer Correct Answer: A) Aluminum. 30. Amu has been replaced by A) Unit. B) Unified mass. C) All the above. D) None of the above. Show Answer Correct Answer: B) Unified mass. 31. Mass of 1 mole particles is known as A) Molar mass. B) Molecular mass. C) Atomic mass. D) None of the above. Show Answer Correct Answer: A) Molar mass. 32. Which of the following statement are true about the formula of dinitrogen monoxide, N$_{2}$O? A) The relative molecular mass is 28. B) One molecule of N$_{2}$O consists of one nitrogen atom and one oxygen atom. C) One mole of N$_{2}$O contains 6.02 x 10$^{23}$ atoms of nitrogen. D) One mole of N$_{2}$O consists of two mole of nitrogen atom and one mole of oxygen atom. Show Answer Correct Answer: D) One mole of N$_{2}$O consists of two mole of nitrogen atom and one mole of oxygen atom. 33. How many moles are are 3.011 x 10$^{22}$ atoms of sodium? A) 1.81 x 10$^{46}$ moles. B) 5.00 x 10$^{21}$ moles. C) 0.0500 moles. D) 5.00 moles. Show Answer Correct Answer: C) 0.0500 moles. 34. Cyclohexanol is dehydrated to cyclohexene on heating with conc H2SO4. The cyclohexene obtained from 100 g cyclohexanol will be(If yield of reaction is 75%) A) 61.5 g. B) 41.0 g. C) 20.0 g. D) 75.0 g. Show Answer Correct Answer: A) 61.5 g. 35. If 6.3 g of NaHCO$_{3}$ are added to 15.0 g of CH$_{3}$COOH solution, the residue is found to weigh 18.0 g. The mass of CO$_{2}$ released in the reaction is:Hint:Law of conservation of mass. A) 27 g. B) 7.2 g. C) 20 g. D) 3.3 g. Show Answer Correct Answer: D) 3.3 g. 36. A bullet of density 5.4g/cm3 and mass 80g is dropped into a 100 ml graduated cylinder containing exactly 50 mL water, To what height will the water level rise in the cylinder A) 50 mL. B) 14.8 mL. C) 64.8 mL. D) 35.2 mL. Show Answer Correct Answer: C) 64.8 mL. 37. A mixture of naphthalene and benzoic acid can be separated by A) Extraction by hot water. B) Sublimation. C) Extraction with cold water. D) Steam distillation. Show Answer Correct Answer: A) Extraction by hot water. 38. Carbocations have ..... shape with positively charged carbon being sp2 hybridised. A) Tetrahedral. B) Trigonal planar. C) Linear. D) None of the above. Show Answer Correct Answer: B) Trigonal planar. 39. Calculate X from the following expression3 moles of hydrogen produces 2 moles of ammonia, then how much of X moles of hydrogen will produce 10 moles of ammonia A) 3/5 moles of hydrogen. B) 10 moles of hydrogen. C) 15 moles of hydrogen. D) None of the above. Show Answer Correct Answer: C) 15 moles of hydrogen. 40. How manyof the following laws need constant temperature and pressure as prime condition to get applicable?1.Law of conservation of mass2.Law of definite proportion3.Law of multiple proportion4.Gay Lussac's Law of gaseous voloume5.Avagadro Law A) 3. B) 4. C) 2. D) 1. Show Answer Correct Answer: C) 2. 41. $\left(2.5\times10^{-2}\right)-\left(4.8\\times10^{-3}\right)$ A) $20.2\times10^{-2}$. B) $20.2\times10^{-3}$. C) $2.02\times10^{-2}$. D) $2.02\times10^{-3}$. Show Answer Correct Answer: C) $2.02\times10^{-2}$. 42. An electrophile is a Lewis ..... A) Radical. B) Anion. C) Acid. D) Base. Show Answer Correct Answer: C) Acid. 43. An atom of neon has 8 valence electrons. What will an atom of neon MOST likely do to be stable? A) Lose 2 electrons. B) Neither gain nor lose any valence electrons. C) Lose 8 electrons. D) Gain 1 electron. Show Answer Correct Answer: B) Neither gain nor lose any valence electrons. 44. Carboxylic acid +? $\rightarrow$ ester A) Alkene. B) Alcohol. C) Water. D) Alkane. Show Answer Correct Answer: B) Alcohol. 45. What is a Excess Reagent? A) What you have left over. B) Amount you end with. C) What you run out of first. D) What you start with. Show Answer Correct Answer: A) What you have left over. 46. Name the elements present in Ammonia A) Nitrogen. B) Hydrogen. C) Both nitrogen and hydrogen. D) None of the above. Show Answer Correct Answer: C) Both nitrogen and hydrogen. 47. The maximum number of electrons with quantum numbers with n=3 and l=2 is A) 2. B) 4. C) 10. D) 6. Show Answer Correct Answer: C) 10. 48. Avogadro's number represents the number of atoms in A) 320g of S. B) 32g of Oxygen. C) 12.7g of iodine. D) 12g of C12. Show Answer Correct Answer: D) 12g of C12. 49. What is different in mixture and pure substances? A) Mixture is composed of substances in any ratio and pure substances are composed in a fixed ratio. B) Mixture is composed of substances in a fixed ratio and pure substances are composed in any ratio. C) All the above. D) None of the above. Show Answer Correct Answer: A) Mixture is composed of substances in any ratio and pure substances are composed in a fixed ratio. 50. The symbol and valency of ammonium is A) NH$_{4}$, valency is 1. B) NH$_{3}$, valency is 1. C) NH$_{3 }$, valency is 2. D) None of the above. Show Answer Correct Answer: A) NH$_{4}$, valency is 1. 51. Most suitable element and most widely accepted standard unit for the measurement of atomic mass A) Oxygen. B) Carbon. C) Nitrogen. D) None of the above. Show Answer Correct Answer: B) Carbon. 52. A certain atom of oxygen contains 8 protons, 8 neutrons, & 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom? A) Its atomic mass is a decimal number. B) It has 9 neutrons in its nucleus. C) It is an isotope of oxygen. D) It cannot be an atom of oxygen. Show Answer Correct Answer: D) It cannot be an atom of oxygen. 53. A pure substance composed of two or more different elements is A) Chemical compound. B) Homogeneous mixture. C) Element. D) Heterogeneous mixture. Show Answer Correct Answer: A) Chemical compound. 54. According to IUPAC nomenclature the name of elements having atomic numbers 103 and 116 are A) Unniltriium and unnilhexium. B) Unniltrium and ununhexium. C) Ununtrium and ununhexium. D) None of these. Show Answer Correct Answer: B) Unniltrium and ununhexium. 55. The number of atoms present in one mole of an element is equal to Avogadronumber. Which of the following element contains the greatest number ofatoms? A) 4g He. B) 0.4g Ca. C) 12g He. D) 46g Na. Show Answer Correct Answer: C) 12g He. 56. What is the maximum number of electrons that contain the values n=4 l=3 A) 18. B) 14. C) 2. D) 10. E) 6. Show Answer Correct Answer: B) 14. 57. If 20 litre nitrogen gas reacts with 30 litre hydrogen gas to give ammonia, the volume of product formed is A) 20. B) 30. C) 50. D) 40. Show Answer Correct Answer: A) 20. 58. $\left(9.6\times10^5\right)\times\left(3.3\times10^{-2}\right)$ A) 5. B) 4. C) -2. D) 3. Show Answer Correct Answer: B) 4. 59. If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of Li$^{++}$ is A) 30.6 eV. B) 13.6 eV. C) 3.4 eV. D) 122.4 eV. Show Answer Correct Answer: A) 30.6 eV. 60. Which of the following numbers have three significant figures?0.300, 0.002, 1.09, 522, 562.0, 5.00, 0.00010, 66.0, 1.100, 1.00001 A) 4. B) 3. C) 2. D) 5. Show Answer Correct Answer: A) 4. ← 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 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 8Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books