This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In group 15 elements, as we move down the group A) Atomic size decreases. B) Metallic character increases. C) Electronegativity increases. D) Stable oxidation state increases. Show Answer Correct Answer: B) Metallic character increases. 2. Which of the following statement is not correct about Ellingham diagram? A) $\Delta$. B) It consists of plots of ' $\Delta$. C) A coupling reaction can be well expressed by this diagram. D) It express the kinetics of the reduction process. Show Answer Correct Answer: D) It express the kinetics of the reduction process. 3. (NH$_{4}$)$_{2}$Cr$_{2}$O$_{7}$ on heating liberates a gas. The same gas will be obtained by: A) Heating NH$_{4}$NO$_{2}$. B) Heating NH$_{4}$NO$_{3}$. C) Treating H$_{2}$O$_{2}$ with NaNO$_{2}$. D) Treating Mg$_{3}$N$_{2}$ with H$_{2}$O. Show Answer Correct Answer: A) Heating NH$_{4}$NO$_{2}$. 4. As we move down the group thermal stability of group 15 elements hydrides A) Increases. B) Decreases. C) Remain constant. D) None of the above. Show Answer Correct Answer: B) Decreases. 5. SO2 can be dried by A) H2SO4. B) CaO. C) H3PO4. D) NONE OF THESE. Show Answer Correct Answer: A) H2SO4. 6. Nitrogen dioxide is A) Coloured. B) Paramagnetic. C) Both. D) None. Show Answer Correct Answer: C) Both. 7. What is the formula for the phosphate ion? A) PO$_{3}$$^{2-}$. B) PO$_{3}$$^{-}$. C) PO$_{2}$$^{-}$. D) PO$_{4}$$^{3-}$. Show Answer Correct Answer: D) PO$_{4}$$^{3-}$. 8. Which of the following oxides is anhydride of nitrous acid? A) NO$_{2}$. B) N$_{2}$O$_{4}$. C) N$_{2}$O$_{3}$. D) NO. Show Answer Correct Answer: C) N$_{2}$O$_{3}$. 9. Which of the following pairs of ions are isoelectronic and isostructural? A) CO$_{3}$$^{2-}$, NO$_{3}$$^{-}$. B) ClO$_{3}$$^{-}$, CO$_{3}$$^{2-}$. C) SO$_{3}$$^{2-}$, NO$_{3}$$^{-}$. D) ClO$_{3}$$^{-}$, SO$_{3}$$^{2-}$. Show Answer Correct Answer: A) CO$_{3}$$^{2-}$, NO$_{3}$$^{-}$. 10. Which alkali metal is the strongest reducing agent? A) Lithium. B) Rubidium. C) Sodium. D) Potassium. Show Answer Correct Answer: A) Lithium. 11. Correct conditions for Contact Process are A) 2 bar pressure, 720 K temperature & Fe catalyst. B) 2 bar pressure, 120 K temperature & V$_{2}$O$_{5}$ catalyst. C) 200 bar pressure, 720 K temperature & V$_{2}$O$_{5}$ catalyst. D) 2 bar pressure, 720 K temperature & V$_{2}$O$_{5}$ catalyst. Show Answer Correct Answer: D) 2 bar pressure, 720 K temperature & V$_{2}$O$_{5}$ catalyst. 12. On reaction with Cl$_{2}$, phophorus forms two types of halides 'A' & 'B' halide. 'A' is yellowish white powder but halide 'B' is colourless only liquid. What would be the hydrolysis products of 'A' & 'B' respectively? A) H$_{3}$PO$_{4}$, H$_{3}$PO$_{3}$. B) HOPO$_{3}$, H$_{2}$PO$_{2}$. C) H$_{3}$PO$_{3}$, H$_{3}$PO$_{4}$. D) HPO$_{3}$, H$_{3}$PO$_{3}$. Show Answer Correct Answer: A) H$_{3}$PO$_{4}$, H$_{3}$PO$_{3}$. 13. Among the following the first ionisation energy is maximum for A) N. B) P. C) AS. D) Bi. Show Answer Correct Answer: A) N. 14. Which of the following compounds is often used as a non-aqueous solvent A) SO3(l). B) SO2(l). C) SeO2 (l). D) CO2(l). Show Answer Correct Answer: B) SO2(l). 15. How many P-O-P bonds appear in cyclotrimetaphophoric acid? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 16. What is the oxidation number of Oxygen in OF$_{2}$? A) +2. B) 0. C) +1. D) -2. Show Answer Correct Answer: C) +1. 17. Which one is having peroxo bond? A) H2SO3. B) H2SO4. C) H2S2O8. D) H2S2o7. Show Answer Correct Answer: C) H2S2O8. 18. How do the properties of p-block elements differ from s-block elements? A) P-block elements differ from s-block elements in electronegativity, bonding types, oxidation states, and the variety of element types present. B) P-block elements have lower ionization energies than s-block elements. C) S-block elements are more diverse in oxidation states than p-block elements. D) P-block elements primarily form ionic bonds unlike s-block elements. Show Answer Correct Answer: A) P-block elements differ from s-block elements in electronegativity, bonding types, oxidation states, and the variety of element types present. 19. The pseudohalogens-because their properties are similar to A) Chalcogens. B) Halogens. C) Representative elements. D) Noblegases. Show Answer Correct Answer: B) Halogens. 20. Hydrolysis reactions of Xenon fluorides are redox reactions A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 21. Cross-linked silicones are formed by the polymerization of A) R$_{2}$Si(OH)$_{2}$. B) RSi(OH)$_{3}$. C) R$_{3}$Si(OH). D) Si(OH)$_{4}$. Show Answer Correct Answer: B) RSi(OH)$_{3}$. 22. Which of these elements has the greater melting point? A) Aluminium. B) Phosphorus. C) Magnesium. D) Silicon. Show Answer Correct Answer: D) Silicon. 23. Diborane contains A) 2 bridge bonds. B) 4 bridge bonds. C) 6 bridge bonds. D) 5 bridge bonds. Show Answer Correct Answer: A) 2 bridge bonds. 24. On addition of conc. H2SO4 to a chloride salt, colourless fumes are evolvedbut in case of iodide salt, violet fumes come out. This is because A) H2SO4 reduces HI to I2. B) HI is of violet colour. C) HI gets oxidised to I2. D) HI changes to HIO3. Show Answer Correct Answer: C) HI gets oxidised to I2. 25. How is the appearance of bromine? A) Purple solid. B) Brown liquid. C) Green gas. D) Yellow gas. Show Answer Correct Answer: B) Brown liquid. ← 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 9Class 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