This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is liquid p-block element at room temperature? A) Mercury. B) Chlorine. C) Bromine. D) Argon. Show Answer Correct Answer: C) Bromine. 2. Nitrogen is chemically inert. Why? A) Due to presence of double bond require more energy to break. B) Due to presence of triple bond require more energy to break. C) Triple bond requires less energy to break. D) None of the above. Show Answer Correct Answer: B) Due to presence of triple bond require more energy to break. 3. Acidity of diprotic acid in aqueous solution increases in the order. A) H2Se < H2Te < H2S. B) H2S < H2Se < H2Te. C) ) H2Te < H2S < H2Se. D) H2Se < H2S < H2Te. Show Answer Correct Answer: B) H2S < H2Se < H2Te. 4. Presence of ozone can be detected by A) FeS. B) CuS. C) PbS. D) None of these. Show Answer Correct Answer: C) PbS. 5. Example for pentagonalbipyramidal molecule A) ICl. B) ICl3. C) IF5. D) IF7. Show Answer Correct Answer: D) IF7. 6. Assertion:N$_{2}$ is less reactive than P$_{4}$ . Reason:Nitrogen has more electron gain enthalpy than phosphorus.(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. 7. The most stable trihalide of nitrogen is A) NF$_{3}$. B) NCl$_{3}$. C) NBr$_{3}$. D) NI$_{3}$. Show Answer Correct Answer: A) NF$_{3}$. 8. What are the three most significant oxidation state of phosphorous A) -3, +3, and +5. B) -3, +3, and-5. C) -3, +3, and +2. D) -3, +3, and +4. Show Answer Correct Answer: A) -3, +3, and +5. 9. Silicones are how many types A) 6. B) 2. C) 4. D) 3. Show Answer Correct Answer: D) 3. 10. Which one is a property of ozone? A) It act as an oxidizing agent in dry state. B) It oxidises PbS to PbSO$_{4}$. C) It oxidises Hg to Hg$_{2}$O. D) All of these. Show Answer Correct Answer: D) All of these. 11. Dry SO$_{2}$ does not dry flowers because A) Nascent hydrogen responsible for bleaching is produced only in presence of moisture. B) Water is the actual reducing agent responsible for bleaching. C) Water is stronger than acid SO$_{2}$. D) The OH$^{-}$ ions produced by water cause bleaching. Show Answer Correct Answer: A) Nascent hydrogen responsible for bleaching is produced only in presence of moisture. 12. SO$_{2}$ + MnO$_{4}$$^{-}$ + H$_{2}$O $\rightarrow$? A) SO$_{4}$$^{2-}$ + Mn$^{2+}$ + H$^{+}$. B) SO$_{4}$$^{2-}$ + MnO$_{2}$ + H$^{+}$. C) SO$_{3}$$^{2-}$ + Mn$^{2+}$ + H$^{+}$. D) SO$_{3}$ + Mn$^{2+}$ + H$^{+}$. Show Answer Correct Answer: A) SO$_{4}$$^{2-}$ + Mn$^{2+}$ + H$^{+}$. 13. The following acids have been arranged in order of decreasing acid strength. Identify the correct order I. ClOHII BrOHIII IOH A) I>II>III. B) II>I>III. C) III>II>I. D) I>III>II. Show Answer Correct Answer: A) I>II>III. 14. Strong reducing behaviour of H$_{3}$PO$_{2}$ is due to A) Low oxidation state of phosphorus. B) Presence of two-OH groups and one P-H bond. C) Presence of one-OH group and two P-H bonds. D) High electron gain enthalpy of phosphorus. Show Answer Correct Answer: C) Presence of one-OH group and two P-H bonds. 15. Nitrogen forms N2, but phosphorus does not form P2, however, it converts P4, reason is A) Triple bond present between phosphorus atom. B) P $\pi$ $\pi$. C) P $\pi$ $\pi$. D) Multiple bonds form easily. Show Answer Correct Answer: B) P $\pi$ $\pi$. 16. Fill in the blanks by choosing the appropriate option. The noble gases can form compounds with (i) and (ii) the mixture of (iii) & (iv) is used for respiration by divers. A) Iodine oxygen oxygen argon. B) Fluorine oxygen helium oxygen. C) Xenon platinum argon krypton. D) Helium oxygen xenon argon. Show Answer Correct Answer: B) Fluorine oxygen helium oxygen. 17. For qualitative analysis of nitrates ions which test is used A) Luccas test. B) Brown ring test. C) Azo dye test. D) None of the above. Show Answer Correct Answer: B) Brown ring test. 18. Silicones or mixed with Paints and enamels to make them resistance towards A) High temperature. B) Sunlight. C) Chemicals. D) All the above. Show Answer Correct Answer: D) All the above. 19. Which is not isoelectronic species A) N3-, S2-, Cl-. B) N3-, Ne, Mg2+. C) B3+, He, Li+. D) Cl-, P3-, Ar. Show Answer Correct Answer: A) N3-, S2-, Cl-. 20. Name of the synthetic radioactive element of group 16 having atomic no.116 is A) Livermorium. B) Tennessine. C) Livernorium. D) Moscovium. Show Answer Correct Answer: A) Livermorium. 21. How does phosphorus contribute to crop yield in agriculture? A) By promoting root development. B) By enhancing pest resistance. C) By improving soil drainage. D) By increasing water retention. Show Answer Correct Answer: A) By promoting root development. 22. During a science class, Ria asked her classmates which of the following element is metalloid. A) Arsenic. B) Phosphorous. C) Fluorine. D) Neon. Show Answer Correct Answer: A) Arsenic. 23. In halogen family which element has more electron affinity A) Chlorine. B) Bromine. C) Fluorine. D) Iodine. Show Answer Correct Answer: A) Chlorine. 24. Borax is ..... A) Na$_{3}$[B$_{2}$O$_{5}$(OH)$_{3}$].7H$_{2}$O. B) Na$_{2}$[B$_{4}$O$_{5}$(OH)$_{4}$].8H$_{2}$O. C) Na$_{4}$[B$_{2}$O$_{6}$(OH)$_{2}$].5H$_{2}$O. D) Na[B(OH)$_{2}$]. Show Answer Correct Answer: B) Na$_{2}$[B$_{4}$O$_{5}$(OH)$_{4}$].8H$_{2}$O. 25. Which of the following is strongest acid among all? A) HI. B) HF. C) HBr. D) HCl. Show Answer Correct Answer: A) HI. ← 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 10Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books