This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The concentration of solution containing 0.5 mole H3PO4 dissolved in 500 g water: A) 1 m. B) 1 M. C) 1 N. D) 0.5 M. Show Answer Correct Answer: B) 1 M. 2. How many significant figures are there? 9009.00 A) 2. B) 4. C) 5. D) 6. Show Answer Correct Answer: D) 6. 3. Nx molar mass = mass(m) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 4. The chemical formula for Magnesium Nitride is: A) MgNO$_{4}$. B) (Mg)$_{2}$NO$_{3}$. C) MnN$_{2}$. D) Mg$_{3}$N$_{2}$. Show Answer Correct Answer: D) Mg$_{3}$N$_{2}$. 5. 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. 6. The displacement of electrons in a multiple bond in the presence of attacking reagent is called A) Inductive effect. B) Electromeric effect. C) Resonance. D) Hyper conjugation. Show Answer Correct Answer: B) Electromeric effect. 7. 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. 8. Which of following intermediate is neutral A) Carbocation. B) Carbanion. C) Carbon freeradical. D) Carbenes. E) 3. Show Answer Correct Answer: C) Carbon freeradical. 9. Which of the following is SI unit of volume A) Cm$^{3}$. B) L. C) ML. D) M$^{3}$. Show Answer Correct Answer: D) M$^{3}$. 10. A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula? A) Mg$_{4}$N$_{3}$. B) MgN$_{2}$. C) Mg$_{3}$N$_{2 }$. D) MgN. Show Answer Correct Answer: C) Mg$_{3}$N$_{2 }$. 11. For which of the following molecule molecular mass can be calculated instead from its formula mass? A) NaBr. B) KI. C) SO2. D) CaCl2. Show Answer Correct Answer: C) SO2. 12. 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. 13. Distance travelled by light in 2.00 ns (speed = $3.0 x 10^8 m/s$ A) 0.6 m. B) 0.7 m. C) 0.8 m. D) 0.5 m. Show Answer Correct Answer: A) 0.6 m. 14. Molar mass is the mass of A) One mole. B) One molecule. C) One atom. D) 1 g. Show Answer Correct Answer: A) One mole. 15. 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. 16. What is the valency of lead? A) 1, 2. B) 5, 7. C) 2, 4. D) 1, 4. Show Answer Correct Answer: C) 2, 4. 17. 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. 18. 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. 19. The molecular mass of glucose (C6H12O6) is approximately: A) 180 u. B) 160 u. C) 120 u. D) 150 u. Show Answer Correct Answer: A) 180 u. 20. How many grams of HCl react with 5.0 g MnO2 in:4HCl + MnO2 $\rightarrow$ 2H2O + MnCl2 + Cl2 A) 3.08 g. B) 6.16 g. C) 9.24 g. D) 12.32 g. Show Answer Correct Answer: B) 6.16 g. 21. 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. 22. 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. 23. Which of the following has the maximum number of unpaired d-electrons? A) Ni$^{3+}$. B) Cu$^{+}$. C) Zn$^{2+}$. D) Fe$^{2+}$. Show Answer Correct Answer: D) Fe$^{2+}$. 24. 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. 25. 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. ← 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 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