This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which does not show inert pair effect? A) Ga. B) In. C) Th. D) Al. Show Answer Correct Answer: D) Al. 2. O$_{3}$ acts as a powerful oxidising agent because A) Ozone is thermodynamically unstable. B) Its decomposition into oxygen results in the liberation of heat. C) It liberates atoms of nascent oxygen (O3 $\rightarrow$ O2 + O). D) Ozone has a characteristic smell. Show Answer Correct Answer: C) It liberates atoms of nascent oxygen (O3 $\rightarrow$ O2 + O). 3. Hydrogen is placed in Group 1 because: A) It has one electron in its outer shell. B) It forms ionic compounds like alkali metals. C) It has properties of both metals and non-metals. D) All of the above. Show Answer Correct Answer: D) All of the above. 4. Which is used as dehydrating agent for dehydration of Ammonia? A) H2SO4. B) H3PO4. C) CaO. D) NONE OF THESE. Show Answer Correct Answer: C) CaO. 5. Nitric acid is prepared by A) Ostwald process. B) Haber process. C) Contact process. D) None of the above. Show Answer Correct Answer: A) Ostwald process. 6. Which P block element is essential for life? A) Phosphorus. B) Arsenic. C) Boron. D) Silicon. Show Answer Correct Answer: A) Phosphorus. 7. What is the molecular geometry of chlorate ion, ClO$_{3}$$^{-}$ A) Trigonal planar. B) Trigonal pyramidal. C) Bent. D) Disphenoidal. Show Answer Correct Answer: B) Trigonal pyramidal. 8. Which of the following is a non-typical p-block element? A) Sulphur. B) Phosphorous. C) Helium. D) Oxygen. Show Answer Correct Answer: C) Helium. 9. Assertion:Dinitrogen is inert at room temperature. Reason:Dinitrogen directly combines with lithium to form ionic nitrides.(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. 10. Which of the following elements occur in native state? A) P. B) S. C) Si. D) I. Show Answer Correct Answer: B) S. 11. Which of the following metals has the largest abundance in the earth's crust? A) Al. B) Ca. C) Mg. D) Na. Show Answer Correct Answer: A) Al. 12. The order of basic nature of hydride compounds of group-15 is ..... A) PH3 > NH3 > AsH3 > SbH3 > BiH3. B) NH3 < PH3 < AsH3 < SbH3 < BiH3. C) NH3 > PH3 > AsH3 > SbH3 > BiH3. D) NH3 > AsH3 > PH3 > SbH3 > BiH3. Show Answer Correct Answer: C) NH3 > PH3 > AsH3 > SbH3 > BiH3. 13. Solder is an alloy that is made of tin and lead. Which is the main role of tin in solder? A) Lower the melting point. B) Increase conductivity. C) Resist corrosion. D) Increase lustre. Show Answer Correct Answer: C) Resist corrosion. 14. What is Silicon's Atomic Number? A) 14. B) 21. C) 188. D) 16. Show Answer Correct Answer: A) 14. 15. Which of the following statements is not true for halogens? A) All form monobasic oxyacids. B) All are oxidizing agents. C) All but fluorine show positive oxidation states. D) Chlorine has the highest electron-gain enthalpy. Show Answer Correct Answer: C) All but fluorine show positive oxidation states. 16. Which of the following elements has the highest metallic content A) Bismuth. B) Aluminium. C) Hydrogen. D) Nitrogen. Show Answer Correct Answer: A) Bismuth. 17. The correct order of increasing electron affinity of halogens is A) I B) Br C) Cl D) I Show Answer Correct Answer: A) I 18. Which property makes aluminum useful in aircraft manufacturing? A) High density. B) High reactivity. C) Low density and high strength. D) Good conductivity. Show Answer Correct Answer: C) Low density and high strength. 19. Phophonitrilic compounds are also known as A) Phosphonitriles. B) Phosphozenes. C) Both. D) None. Show Answer Correct Answer: C) Both. 20. Element X dissolves in water to produce a solution that turns the blue litmus paper red and then decolourised. What is element X? A) Sodium. B) Bromine. C) Sulphur. D) Neon. Show Answer Correct Answer: B) Bromine. 21. Holme's signal uses chemical compound A) Calcium carbide. B) Calcium phosphide. C) Calcium carbide and aluminium phosphide. D) Calcium carbide and aluminium carbide. Show Answer Correct Answer: C) Calcium carbide and aluminium phosphide. 22. BrF$_{5 }$is A) Square planer. B) Trigonal bipyramidal. C) Square pyramidal. D) See-Saw. Show Answer Correct Answer: C) Square pyramidal. 23. The element of group 17 whose half life is in milliseconds only is A) Ts. B) Te. C) At. D) Og. Show Answer Correct Answer: A) Ts. 24. Whic of the following is pseudohalogen A) CN-. B) (CN)2. C) N3-. D) All. Show Answer Correct Answer: D) All. 25. The correct statement(s) about O$_{3}$ is(are) (i) O-O bond lengths are equal (ii) Thermal decomposition of O$_{3}$ is endothermic (iii) O$_{3}$ is diamagnetic in nature (iv) O$_{3}$ has a bent structure A) (i) and (iii). B) (ii) and (iii). C) (i), (iii) and (iv). D) (i) and (iv). Show Answer Correct Answer: C) (i), (iii) and (iv). ← 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