This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following element contains the greatest number of atoms? A) 4g He. B) 46g Na. C) 0.4g Ca. D) 12g He. Show Answer Correct Answer: D) 12g He. 2. How much sodium acetate is needed to prepare 500 mL of 0.375 M solution? A) 15.38 g. B) 18.2 g. C) 19.6 g. D) 20.4 g. Show Answer Correct Answer: A) 15.38 g. 3. Matter in a ..... has a ..... volume and ..... shape A) Gaseous state no definite no definite. B) Liquid state no definite definite. C) A. solid state no definite no definite. D) None of the above. Show Answer Correct Answer: A) Gaseous state no definite no definite. 4. What term is given to a compound which contains atoms of carbon and hydrogen only? A) Alkene. B) Hydrocarbon. C) Alkane. D) Saturated. Show Answer Correct Answer: B) Hydrocarbon. 5. Find the molecular mass of $BeCl_2$ A) 80 u. B) 79u. C) 78 u. D) 80.5. Show Answer Correct Answer: A) 80 u. 6. The element with the smallest ionization energy in Period 6 is- A) Rn. B) Cs. C) Os. D) Tm. Show Answer Correct Answer: B) Cs. 7. What name is given to the number of atoms in a mole of an element? A) Planck's constant. B) Avogadro's constant. C) Newtonian constant. D) None of the above. Show Answer Correct Answer: B) Avogadro's constant. 8. How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution? A) 1.07 gram. B) 62.7 mol. C) 1.07 mol. D) 62.7 grams. Show Answer Correct Answer: C) 1.07 mol. 9. Order of stability of carbocation is A) Tert>sec>pri>methyl. B) Methyl>pri>sec>tert. C) Pri>sec>tert>methyl. D) Sec>tert>pri>methyl. E) 1. Show Answer Correct Answer: A) Tert>sec>pri>methyl. 10. When 1 mole of carbon is burnt in air, carbon dioxide produced is: A) 11 g. B) 22 g. C) 44 g. D) 88 g. Show Answer Correct Answer: C) 44 g. 11. Ferric chloride is A) FeCl$_{4}$. B) Fe$_{2}$Cl$_{3}$. C) FeCl$_{3}$. D) FeCl$_{2}$. Show Answer Correct Answer: C) FeCl$_{3}$. 12. O3 is ..... A) Molecule. B) Compound. C) Atom. D) None of the above. Show Answer Correct Answer: A) Molecule. 13. ..... are any substances that are able to dissolve another substance. A) Organic. B) Potion. C) Magical. D) Solvents. Show Answer Correct Answer: D) Solvents. 14. How many grams of AgNO$_{3}$ are needed to prepare 0.125 M solution in 250 mL of water? (M$_{r}$ =169.87 g mol$^{-1}$) A) 0.03 g. B) 0.5 g. C) 5.3 g. D) 84.9 g. Show Answer Correct Answer: C) 5.3 g. 15. Measurement which is close to true value is called as ..... A) Exact. B) Precise. C) Average. D) Accurate. Show Answer Correct Answer: D) Accurate. 16. 1amu is A) 1/12 (weight of C-12 atom). B) 1/14 (weight of C-12 atom). C) 1/2 (weight of C-12 atom). D) None of the. Show Answer Correct Answer: A) 1/12 (weight of C-12 atom). 17. The balancing of chemical equations is based upon A) Law of combining volumes. B) Law of multiple proportions. C) Law of conservation of mass. D) Law of definite proportions. Show Answer Correct Answer: C) Law of conservation of mass. 18. Mass of 1 molecule is known as A) Atomic mass. B) Molecular mass. C) Molar mass. D) None of the above. Show Answer Correct Answer: B) Molecular mass. 19. The law of multiple proportions is illustrated by A) Carbon monoxide and carbon dioxide. B) Potassium bromide and potassium chloride. C) Water and heavy water. D) Calcium hydroxide and barium hydroxide. Show Answer Correct Answer: B) Potassium bromide and potassium chloride. 20. The no of molecules in 22.4 cm$^{3}$ of nitrogen gas at STP is A) $6.022\times10^{20}$. B) $6.022\times10^{23}$. C) $22.4\times10^{20}$. D) $22.4\times10^{23}$. Show Answer Correct Answer: A) $6.022\times10^{20}$. 21. Which of the following is used to measure mass accurately? A) Analytical balance. B) Thermometer. C) Barometer. D) Massometer. Show Answer Correct Answer: A) Analytical balance. 22. According to the Law of Conservation of Mass: A) Mass can be created during a chemical reaction. B) Mass is destroyed during combustion. C) Mass remains constant during a chemical reaction. D) Mass changes depending on temperature. Show Answer Correct Answer: C) Mass remains constant during a chemical reaction. 23. Volume occupied by 1 mole of any gaseous substance at 273 K and 1 bar pressure is ..... A) 22.71 litres. B) 22.4 litres. C) 24.5 litres. D) None of the above. Show Answer Correct Answer: A) 22.71 litres. 24. Brass is a copper-zinc alloy. If the concentration of zinc is relatively low, the brass has a golden color and is often used for inexpensive jewelry. If a 35.0g pendant contains 1.7g of zinc, what is the % by mass of zinc in brass? A) 4.7%. B) 4.8%. C) 4.9%. D) 10%. Show Answer Correct Answer: C) 4.9%. 25. G of dibasic acid required 100 mL of 0.1 N NaOH for complete neutralization. The equivalent weight of acid is: A) 26. B) 52. C) 104. D) 156. Show Answer Correct Answer: B) 52. ← 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