This quiz works best with JavaScript enabled. Home > Class 11 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How many moles of methane are required to produce 22g of CO$_{2}$(g) after combustion? A) 2 Moles. B) 1 Moles. C) 0.5 Moles. D) 0.05 Moles. Show Answer Correct Answer: C) 0.5 Moles. 2. A measured temperature on Fahrenheit scale is is 200$^\circ$F .What will be it's reading on Celcius scale? A) 40$^\circ$C. B) 94$^\circ$C. C) 93.3$^\circ$C. D) 30$^\circ$C. Show Answer Correct Answer: C) 93.3$^\circ$C. 3. Atom is the smallest particle of A) Compound. B) Substance. C) Element. D) Mixture. Show Answer Correct Answer: C) Element. 4. The empirical formula for hydrocarbon A is C$_{2}$H$_{7}$O. If the molar mass of the hydrocarbon is 141 g/mol, determine the molecular formula for this hydrocarbon. A) C$_{2}$H$_{7}$O. B) C$_{4}$H$_{14}$O$_{2}$. C) C$_{6}$H$_{21}$O$_{3}$. D) C$_{8}$H$_{28}$O$_{4}$. Show Answer Correct Answer: C) C$_{6}$H$_{21}$O$_{3}$. 5. Which would have more atoms? A) 1 mole of Li. B) 1 mole of Au. C) 1 mole of Si. D) None, all are equal. Show Answer Correct Answer: D) None, all are equal. 6. The ..... states that mass is neither created nor destroyed in a chemical reaction, it is conserved A) Law of Conservation of Water. B) Law of Conservation of Matter. C) Law of Conservation of Atoms. D) Law of Conservation of Minerals. Show Answer Correct Answer: B) Law of Conservation of Matter. 7. Determine the number of moles of Na$_{2}$CrO$_{4}$ that contain 4.33 x 10$^{24}$ oxygen atoms. Given the Avogadro's number, NA is 6.02 x 10$^{23}$. A) 7.19 mol. B) 6.77 mol. C) 1.80 mol. D) 64.00 mol. Show Answer Correct Answer: C) 1.80 mol. 8. How many significant figures:216 m A) 1. B) 2. C) 3. D) 0. Show Answer Correct Answer: C) 3. 9. Avogadro's number of representative particles is equal to one ..... A) Molecule. B) Gram. C) Atom. D) Mole. Show Answer Correct Answer: D) Mole. 10. An element, X has the following isotopic composition, $^{200}$X:90%$^{199}$X:8%$^{202}$X:2%The weighted average atomic mass of the naturally occurring element 'X' is closest to: A) 201 amu. B) 202 amu. C) 199 amu. D) 200 amu. Show Answer Correct Answer: D) 200 amu. 11. An alcohol can be ..... to form a carboxylic acid A) Oxidised. B) Reduced. C) Polymerised. D) Broken down. Show Answer Correct Answer: A) Oxidised. 12. Carbonium ions are the intermediates in which the positive charge is carried by the carbon atom with ..... electrons in the valence shell. A) 5. B) 6. C) 7. D) 8. Show Answer Correct Answer: B) 6. 13. Sulphur shows valencies A) 2. B) 4. C) Both. D) None of the above. Show Answer Correct Answer: C) Both. 14. How many significant figures are present in 0.0025 A) Two. B) Three. C) Four. D) Five. Show Answer Correct Answer: A) Two. 15. Smallest indivisible part of matter is? A) Atom. B) Molecule. C) Compound. D) Element. Show Answer Correct Answer: A) Atom. 16. The smallest part of an element which can participate in a chemical reaction is A) Ions. B) Elements. C) Atoms. D) Molecules. Show Answer Correct Answer: C) Atoms. 17. Calculate molarity if mole fraction of ethanol is 0.040, assuming water density 1 g/mL: A) 1.0 M. B) 2.2 M. C) 3.3 M. D) 4.0 M. Show Answer Correct Answer: B) 2.2 M. 18. H is a chemical name for ..... A) Helium. B) Hydrogen. C) Potassium. D) None of the above. Show Answer Correct Answer: B) Hydrogen. 19. 12 g of C$^{12 }$atom A) Avagadros nommber of atom. B) 1 gram atom. C) 1 mole. D) All of these. Show Answer Correct Answer: D) All of these. 20. Formula masses & "formula units" are used when referring to ..... and molecular masses & "molecules" are used when referring to ..... A) Ionic compounds covalently-bonded compounds. B) Covalently-bonded compounds ionic compounds. C) Atoms ionic compounds. D) Covalently-bonded compounds atoms. Show Answer Correct Answer: A) Ionic compounds covalently-bonded compounds. 21. Kerosene oil and NaCl solution results in A) Homogenous mixture. B) Heterogenous mixture. C) Pure substances. D) None of these are correct. Show Answer Correct Answer: B) Heterogenous mixture. 22. The atom with the largest atomic radius in Group 18 is- A) Ar. B) He. C) Kr. D) Rn. Show Answer Correct Answer: D) Rn. 23. If measurements are close to each other but not close to the true value, the measurements are considered: A) Accurate but not precise. B) Precise but not accurate. C) Neither accurate nor precise. D) Both accurate and precise. Show Answer Correct Answer: B) Precise but not accurate. 24. A 100 mL solution of CH3CH2MgBr on treatment with methanol produces 2.24 mL of a gas at STP. The weight of gas produced is ..... mg A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 25. The law illustrated by the given mass ratios of dinitrogen and dioxygen reacting to form compounds is: A) Law of Conservation of Mass. B) Law of Definite Proportions. C) Law of Multiple Proportions. D) Gay Lussac's Law of Gaseous Volumes. Show Answer Correct Answer: C) Law of Multiple Proportions. ← 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 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 10Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books