This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How many atoms of magnesium are present in 192u of Magnesium A) 0.25. B) 25. C) 8. D) 0.4. Show Answer Correct Answer: C) 8. 2. ..... is a separation technique for homogeneous mixtures that is based on the differences in boiling points of substances. A) Distillation. B) Filtration. C) Crystallization. D) Sublimation. Show Answer Correct Answer: A) Distillation. 3. Quantity of carbon dioxide produced by reaction of 48g of Carbon and 1 mol of dioxygen is ..... A) 22g. B) 11g. C) 44g. D) 24g. Show Answer Correct Answer: C) 44g. 4. What is the mass percent of carbon in carbon di oxide? A) 0.034%. B) 27.27%. C) 3.4%. D) 28.7%. Show Answer Correct Answer: B) 27.27%. 5. Which of the following reactions is not correct according to the law ofconservation of mass.(i) (ii) (iii) (iv) A) 2Mg(s) + O2(g) $\rightarrow$ 2MgO(s). B) C3H8(g) + O2(g) $\rightarrow$CO2(g) + H2O(g). C) P4(s) + 5O2(g)$\rightarrow$ P4O10(s). D) CH4(g) + 2O2(g) $\rightarrow$ CO2(g) + 2H2O (g). Show Answer Correct Answer: B) C3H8(g) + O2(g) $\rightarrow$CO2(g) + H2O(g). 6. Which of the following term is Unitless. A) Molality. B) Molarity. C) Mole Fraction. D) Normality. Show Answer Correct Answer: C) Mole Fraction. 7. . Boron exists as two stable isotopes; $^{10}$B(19%) and $^{11}$B(81%). Find out the average atomic weight of boron in the periodic table A) 10.0. B) 11.2. C) 10.2. D) 10.8. Show Answer Correct Answer: D) 10.8. 8. Two compounds A and B have same percentage composition. The compounds A and B A) Are identical. B) Are Isomers. C) Are neither identical nor isomers. D) All the three are correct. Show Answer Correct Answer: D) All the three are correct. 9. How many moles of ions are there per mole of Al$_{2}$(SO$_{4}$)$_{3}$? A) 1. B) 3. C) 5. D) 7. Show Answer Correct Answer: C) 5. 10. The concentration of sugar (C$_{12}$H$_{22}$O$_{11}$) in mol L$^{-1}$ if its 20 g are dissolved in enough water to make a volume up to 2 L is: A) 0.029. B) 0.92. C) 0.356. D) 0.859. Show Answer Correct Answer: A) 0.029. 11. The density of 3M solution of sodium chloride is 1.252 g mL$^{-1}$. The molality of the solution will be (molar mass, NaCl = 58.5 g mol$^{-1}$) A) 1) 2.18 m. B) (2) 3.00 m. C) (3) 2.60 m. D) (4) 2.79 m. Show Answer Correct Answer: D) (4) 2.79 m. 12. An molecular formula represents A) The simplest whole number ratio of various atoms present in a compound. B) The exact number of different types of atoms present in a molecule of a compound. C) All the above. D) None of the above. Show Answer Correct Answer: B) The exact number of different types of atoms present in a molecule of a compound. 13. An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have? A) 0. B) 7. C) 6. D) 13. Show Answer Correct Answer: C) 6. 14. There are two chlorides of sulphur S$_{2}$Cl$_{2}$ and SCl$_{2}$. What is the equivalent mass of S in SCl$_{2}$(a) 64.8 g/mole A) 64.8 g/mole. B) 32 g/mole. C) 16 g/mole. D) 8 g/mole. Show Answer Correct Answer: C) 16 g/mole. 15. An atom of iodine has 7 valence electrons. What will an atom of iodine MOST likely do to be stable? A) Lose 1 electron. B) Lost 7 electrons. C) Gain 1 electron. D) Neither gain nor lose any valence electrons. Show Answer Correct Answer: C) Gain 1 electron. 16. Which of the following carbocation is most stable A) Methyl. B) Primary. C) Secondary. D) Tertiary. E) 4. Show Answer Correct Answer: D) Tertiary. 17. We need medicines in daily lifes for incase. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. ML of 1.5 M solution of sulphuric acid is diluted by adding 5L of water. The molarity of the diluted solution is: A) 0.0926. B) 0.0823. C) 0.0714. D) 12. Show Answer Correct Answer: C) 0.0714. 19. The density of a solution prepared by dissolving 120 g of urea (mol. mass = 60 u) in 1000 g of water is 1.15 g/mL. The molarity of this solution is A) 2.05 M. B) 0.50 M. C) 1.78 M. D) 1.02 M. Show Answer Correct Answer: A) 2.05 M. 20. Which of the following data illustrates the law of conservation of mass? A) 56 g of CO reacts with 32 g of oxygen to produce 44 g of carbon dioxide. B) 1.70 of Silver nitrate reacts with 100 mL of 0.1 MHCl to produce 1.435 g of AgCl and 0.63 g of nitric acid. C) 12 g of C is heated in vaccum and on cooling there is no change in mass. D) None of the above. Show Answer Correct Answer: B) 1.70 of Silver nitrate reacts with 100 mL of 0.1 MHCl to produce 1.435 g of AgCl and 0.63 g of nitric acid. 21. In 3 moles of ethane (C2H6), the moles of hydrogen atoms are: A) 6 mol. B) 12 mol. C) 18 mol. D) 36 mol. Show Answer Correct Answer: C) 18 mol. 22. 2L of 0.2M H$_{2}$SO$_{4}$ is reacted with 2L of 0.1M NaOH solution, the molarity of the resulting product Na$_{2}$SO$_{4}$ in the solution is ..... millimolar. A) 20. B) 25. C) 30. D) 35. Show Answer Correct Answer: B) 25. 23. For principal quantum number n=4, the total number of orbitals having l=3 is A) 3. B) 5. C) 7. D) 9. Show Answer Correct Answer: C) 7. 24. Which of the following law was given by Antoine Lavoisier? A) Law of conservation of mass. B) Law of definite proportion. C) Law of definite composition. D) Only two of the options are correct. Show Answer Correct Answer: A) Law of conservation of mass. 25. What are the three prime states of matter? A) Solid gas and water. B) Plasma gas and liquid. C) Gas solid and liquid. D) Plasma fluid and gas. Show Answer Correct Answer: C) Gas solid and liquid. ← 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 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books