This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why is Sulphur dioxide considered as an air pollutant? A) It increases the temperature of the atmosphere. B) It is used as insecticide which causes air pollution. C) It causes acid rain due to formation of sulphuric acid on combining with O$_{2}$ and H$_{2}$O. D) It is a strong oxidizing agent hence oxidies the other components of air. Show Answer Correct Answer: C) It causes acid rain due to formation of sulphuric acid on combining with O$_{2}$ and H$_{2}$O. 2. Atomic number of polonium A) 84. B) 40. C) 54. D) 39. Show Answer Correct Answer: A) 84. 3. What is the trend in melting points for Group 14 elements? A) Melting points increase from carbon to lead. B) Melting points are constant across Group 14 elements. C) Melting points vary randomly without a trend. D) Melting points decrease from carbon to lead. Show Answer Correct Answer: A) Melting points increase from carbon to lead. 4. Which "Halogen" can able to replace Chlorine in Sodium Chloride? A) Flourine. B) Bromine. C) Iodine. D) Astatine. Show Answer Correct Answer: A) Flourine. 5. If chlorine is passed through a solution of Hydrogen sulphide in water, the solution turns turbid due to the formation of A) Free chlorine. B) Free sulphur. C) Nascent oxygen. D) Nascent hydrogen. Show Answer Correct Answer: B) Free sulphur. 6. In 13th group Tl$^{+1 }$ion is more stable than Tl$^{3+}$ ion due to A) High electronegatively. B) Inert pair effect. C) High ionisation energy. D) Stable electronic configuration. Show Answer Correct Answer: B) Inert pair effect. 7. Least reactive noble gas. A) Xenon. B) Radon. C) Krpton. D) Helium. Show Answer Correct Answer: D) Helium. 8. Most reactive elemental gas. A) Oxygen. B) Fluorine. C) Chlorine. D) Hydrogen. Show Answer Correct Answer: B) Fluorine. 9. Which statement is true about halogens? A) Form covalent compounds with other non-metallic elements. B) A less reactive halogen will displace a more reactive element form its ionic salt. C) Form ionic compound with hydrogen. D) Form negative ion of charge-2. Show Answer Correct Answer: A) Form covalent compounds with other non-metallic elements. 10. Which of the following pairs is used as promoter in the manufacture of NH3? A) FeO and Fe. B) KCl and AlCl3. C) K2O and Al2O3. D) KCl and FeCl3. Show Answer Correct Answer: C) K2O and Al2O3. 11. Which of the following is strongest proton accepter? A) H2S. B) NH3. C) PH3. D) H2O. Show Answer Correct Answer: B) NH3. 12. What is the most stable allotrope of sulfur, a Group 15 element? A) Monoclinic sulfur. B) Cubic sulfur. C) Rhombic sulfur. D) Amorphous sulfur. Show Answer Correct Answer: C) Rhombic sulfur. 13. Which of the following compounds is not formed by lithium? A) Lithium ethynide. B) Lithium nitride. C) Lithium oxide. D) Lithium chloride. Show Answer Correct Answer: A) Lithium ethynide. 14. Boron compounds behave as lewis acids because of their A) Ionisation energy. B) Electron deficient nature. C) Covalent nature. D) Ionisation energy. Show Answer Correct Answer: B) Electron deficient nature. 15. Which of the following is solid p-block element at room temperature? A) Oxygen. B) Nitrogen. C) Iodine. D) Bismuth. Show Answer Correct Answer: D) Bismuth. 16. Which of the following statements regarding ozone is not correct? A) The oxygen-oxygen bond length in ozone is identical with that of molecular oxygen. B) The ozone is resonance hybrid of two structures. C) The ozone molecule is angular in shape. D) Ozone is used as a germicide and disinfectant for the purification of air. Show Answer Correct Answer: A) The oxygen-oxygen bond length in ozone is identical with that of molecular oxygen. 17. Which of the following elements has the maximum covalency of 6? A) Carbon. B) Nitrogen. C) Oxygen. D) Fluorine. Show Answer Correct Answer: A) Carbon. 18. Electronegativity of oxygen is more than sulphur yet H2S isacidic while water is neutral. This is because A) Water is highly associated compound. B) Molecular mass of H2S is more than H2O. C) H2S is gas while H2O is a liquid. D) H-S bond is weaker than H-O bond. Show Answer Correct Answer: D) H-S bond is weaker than H-O bond. 19. Conc HNO3 is yellow in colour due to presence of A) NO2 dissolve in it. B) NO dissolve in it. C) N2O dissolve in it. D) N2O3 dissolve in it. Show Answer Correct Answer: A) NO2 dissolve in it. 20. Assertion:Bond angle of H$_{2 }$S is smaller than H$_{2}$O. Reason:Electronegativity of the central atom increases, bond angle decreases.(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion. (b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion (c) Assertion is correct, reason is incorrect (d) Assertion is incorrect, reason is correct A) A. B) B. C) C. D) D. Show Answer Correct Answer: C) C. 21. According to VSEPR theory, the structure of IF7 is A) Bent T shape. B) Square pyramidal. C) Pentagonal bipyramidal. D) Tetrahedral. Show Answer Correct Answer: C) Pentagonal bipyramidal. 22. What is the nature of the oxides of carbon and silicon? A) Basic and neutral. B) Alkaline and acidic. C) Acidic and amphoteric. D) Neutral and amphoteric. Show Answer Correct Answer: C) Acidic and amphoteric. 23. Which of the following alkali metals forms a superoxide? A) Li. B) Na. C) K. D) Rb. Show Answer Correct Answer: C) K. 24. Identifying the incorrect statement about acidic oxides in the p-block: A) Aluminium oxide is an example of an amphoteric oxide. B) Carbon dioxide forms carbonic acid upon dissolution in water, showcasing its acidic oxide nature. C) Bismuth oxide is a typical basic oxide found in the p-block. D) None of the above. Show Answer Correct Answer: C) Bismuth oxide is a typical basic oxide found in the p-block. 25. Which property of Group 18 elements increases when going down the Group in the Periodic Table? A) Forces of attraction. B) Reactivity. C) Solubility in water. D) Electrical conductivity. Show Answer Correct Answer: A) Forces of attraction. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 1Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 2Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 3Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 4Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 5Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 6Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 7Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 8Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 9Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books