This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part Ii > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The correct order of acid strength is A) HCIO < HClO2 < HClO3 < HClO4. B) HClO4 < HClO < HClO2 < HClO3. C) HClO4 < HClO3 < HClO2 < HClO. D) (d) HClO2 < HClO3 < HClO4 < HClO. Show Answer Correct Answer: A) HCIO < HClO2 < HClO3 < HClO4. 2. At room temperature, iodine is a ..... A) Gas. B) Liquid. C) Solid. D) None of the above. Show Answer Correct Answer: C) Solid. 3. Most acidic oxide among the following is- A) As2O3. B) P2O5. C) N2O5. D) N2O4. Show Answer Correct Answer: C) N2O5. 4. In the interhalogen compound XX', which among the following statement is correct A) X is larger halogen, X' is smaller halogen. B) X is smaller halogen, X' is larger halogen. C) Both X and X' are of the same size. D) Size of X and X' doesn't matter. Show Answer Correct Answer: A) X is larger halogen, X' is smaller halogen. 5. State the value of $\Delta$fH in the industrial production of ammonia by Haber process. A) -198.4 kJ mol-1. B) -46.1 kJ mol-1. C) +92.2 kJ mol-1. D) 0.00 kJ mol-1. Show Answer Correct Answer: B) -46.1 kJ mol-1. 6. What is the primary use of sodium and potassium ions in biological systems? A) Energy storage. B) Muscle contraction. C) Oxygen transport. D) Nerve signal transmission. Show Answer Correct Answer: D) Nerve signal transmission. 7. Which one of the following is an antichlor agent? A) SO2. B) NH3. C) SO3. D) PH3. Show Answer Correct Answer: A) SO2. 8. Oxygen and sulphur both are the members of the same group in periodic table but H$_{2}$O is liquid while H$_{2}$S is gas because A) Water molecules are having weak hydrogen bonds between them. B) H$_{2}$S is weak acid. C) Molecular weight of water is more. D) Electronegativity of sulphur is more. Show Answer Correct Answer: A) Water molecules are having weak hydrogen bonds between them. 9. Which of the following is correct related to the negative ion? A) The number of electrons is twice the number of protons. B) The number of electrons is greater than the number of protons. C) The number of protons equals the number of electrons. D) The number of protons is twice the number of electrons. Show Answer Correct Answer: B) The number of electrons is greater than the number of protons. 10. How do the chemical properties of group 13 elements differ from those of group 14 elements? A) Group 13 elements have mixed properties and can form +4 oxidation states. B) Group 14 elements are more reactive and only form +2 oxidation states. C) Group 13 elements are more metallic and form +3 oxidation states, while group 14 elements have mixed properties and can form +4 oxidation states. D) Group 13 elements are non-metallic and form-3 oxidation states. Show Answer Correct Answer: C) Group 13 elements are more metallic and form +3 oxidation states, while group 14 elements have mixed properties and can form +4 oxidation states. 11. Layer test is not shown by A) Chloride. B) Bromide. C) Iodide. D) All halides. Show Answer Correct Answer: A) Chloride. 12. How many P-OH bonds are there in Phosphinic acid? A) 1. B) 2. C) 3. D) None of these. Show Answer Correct Answer: A) 1. 13. The hybidizations of Phosphorous and Nitrogen in Phosphonitrilic halides are respectively A) Sp$^{2 }$and sp$^{3}$. B) Sp$^{3}$ and sp$^{2}$. C) Sp and sp$^{3}$. D) Sp and sp$^{2}$. Show Answer Correct Answer: B) Sp$^{3}$ and sp$^{2}$. 14. Many of the Boron compounds are A) Electron rich. B) Electron deficient. C) Electron donor. D) None. Show Answer Correct Answer: B) Electron deficient. 15. What is the nature of carbide of silicon A) Covalent. B) Ionic. C) Metallic. D) Van der waals. Show Answer Correct Answer: A) Covalent. 16. Which of the following is a interstitial carbide A) Be2C. B) Al4C3. C) SiC. D) WC. Show Answer Correct Answer: D) WC. 17. Chlorine reacts with excess of ammonia to give A) N2+NH4Cl. B) NH4Cl. C) N2 + HCl. D) N2+NCl3. Show Answer Correct Answer: A) N2+NH4Cl. 18. If the formula of borax is Na$_{2}$B$_{4}$O$_{x}$(OH)$_{y}$.zH$_{2}$O, then x+y+z is A) 17. B) 16. C) 15. D) 14. Show Answer Correct Answer: A) 17. 19. Which Group 16 element is a gas at room temperature? A) Selenium. B) Tellurium. C) Oxygen. D) Sulfur. Show Answer Correct Answer: C) Oxygen. 20. Which of the following does not belong to group 18 A) Radon. B) Aluminium. C) Neon. D) Krypton. Show Answer Correct Answer: B) Aluminium. 21. The oxides of boron and silicon are ..... in nature. A) Basic and neutral. B) Alkaline and acidic. C) Acidic and amphoteric. D) Neutral and amphoteric. Show Answer Correct Answer: C) Acidic and amphoteric. 22. How does the atomic radius change across the s and p-blocks? A) The atomic radius decreases across a period and increases down a group in the s and p-blocks. B) The atomic radius decreases down a group and increases across a period in the s and p-blocks. C) The atomic radius increases across a period and decreases down a group in the s and p-blocks. D) The atomic radius remains constant across a period and increases down a group in the s and p-blocks. Show Answer Correct Answer: A) The atomic radius decreases across a period and increases down a group in the s and p-blocks. 23. What are the properties of noble gases in the p-block? A) Noble gases are dense, metallic, and have high melting points. B) Noble gases are unstable, reactive, and have strong odors. C) Noble gases are highly reactive, colorful, and have high boiling points. D) Noble gases are stable, unreactive, colorless, odorless, and have low boiling and melting points. Show Answer Correct Answer: D) Noble gases are stable, unreactive, colorless, odorless, and have low boiling and melting points. 24. Xe has closed shell configuration but is known to give compounds with fluorine because A) Xe atom has large size and lower ionization potential as compared to other noble gases. B) Xe has unpaired electrons which can form covalent bonds. C) Xe has highest b.p hence it can form compounds with fluorine. D) Fluorine is the smallest element hence it can react with all noble gases. Show Answer Correct Answer: A) Xe atom has large size and lower ionization potential as compared to other noble gases. 25. 3centered two electron bond present in diborane A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 26. The oxidation state of S in the anions SO$^{2-}$$_{3}$, S$_{2}$O$^{2-}$$_{4}$ & S$_{2}$O$^{2-}$$_{6}$ follows the order A) SO$^{2-}$$_{3}$< S$_{2}$O$^{2-}$$_{4}$< S$_{2}$O$^{2-}$$_{6}$. B) S$_{2}$O$^{2-}$$_{4}$< SO$^{2-}$$_{3}$< S$_{2}$O$^{2-}$$_{6}$. C) S$_{2}$O$^{2-}$$_{4}$< S$_{2}$O$^{2-}$$_{6}$< SO$^{2-}$$_{3}$. D) S$_{2}$O$^{2-}$$_{6}$< S$_{2}$O$^{2-}$$_{4}$< SO$^{2-}$$_{3}$. Show Answer Correct Answer: B) S$_{2}$O$^{2-}$$_{4}$< SO$^{2-}$$_{3}$< S$_{2}$O$^{2-}$$_{6}$. 27. $_{88}$Ra$^{226}$ $\rightarrow$ $_{86}$Rn$^{222}$ + X . Identify X A) $\alpha$ particle. B) $_{2}$He$^{4}$. C) $\beta$ particle. D) Positron. Show Answer Correct Answer: B) $_{2}$He$^{4}$. 28. Identify the reason for Noble gases to have low boiling point. A) Unreactive gases. B) No inter atomic force of attraction. C) Weak dispersion forces of attraction. D) Monatomic gases. Show Answer Correct Answer: C) Weak dispersion forces of attraction. 29. Assertion:Ozone is thermodynamically stable with respect to oxygen.Reason:Decomposition of ozone into oxygen results in the liberation of heat(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: D) D. 30. What is the trend in electronegativity across the P block? A) Electronegativity increases across the P block from left to right. B) Electronegativity remains constant across the P block. C) Electronegativity decreases across the P block from left to right. D) Electronegativity increases down the P block. Show Answer Correct Answer: A) Electronegativity increases across the P block from left to right. 31. Complete the given equations:i) Cu+8HNO$_{3}$$\rightarrow$ 3Cu(NO$_{3}$)$_{2}$+W+4H$_{2}$Oii) 4Zn+10HNO$_{3}$$\rightarrow$4Zn(NO$_{3}$)$_{2}$+5H$_{2}$O+Xiii) I$_{2}$+10HNO$_{3}$$\rightarrow$Y+10NO$_{2}$+4H$_{2}$O A) 2NO N$_{2}$O 2HIO$_{3}$. B) 2NO$_{2}$ NO 5HIO$_{3}$. C) N$_{2 }$ NO$_{2}$ HI. D) N$_{2}$O NO$_{2}$ 3HI. Show Answer Correct Answer: A) 2NO N$_{2}$O 2HIO$_{3}$. 32. What is the name of the following ion?ClO$_{3}$ $^{-}$ A) Chlorate ion. B) Perchlorate ion. C) Chloride ion. D) Chlorite ion. Show Answer Correct Answer: A) Chlorate ion. 33. What are the common uses of phosphorus, a P block element? A) Phosphorus is primarily used in electronics manufacturing. B) Common uses of phosphorus include fertilizers, food additives, safety matches, and chemical manufacturing. C) Phosphorus is a key ingredient in cosmetics. D) Phosphorus is mainly used for water purification. Show Answer Correct Answer: B) Common uses of phosphorus include fertilizers, food additives, safety matches, and chemical manufacturing. 34. A brown ring is formed in the ring test for $NO_3^-$ A) $FeSO_4NO_2$. B) $FeSO_4HNO_3$. C) $\left[Fe\left(\left[\left(H_2O\right)_5\left(NO\right)\right]^{2+}\right)\right]$. D) $\left[Fe\left(\left[\left(H_2O\right)_4\left(NO\right)_2\right]^{2+}\right)\right]$. Show Answer Correct Answer: C) $\left[Fe\left(\left[\left(H_2O\right)_5\left(NO\right)\right]^{2+}\right)\right]$. 35. The molecule XeF6 has the following structure A) Square pyramidal. B) Pyramidal. C) Square planar. D) Distorted octahedral. Show Answer Correct Answer: D) Distorted octahedral. 36. Which one of these is an silicon oxide??? A) Gold. B) Sand. C) Silver. D) Wood. Show Answer Correct Answer: B) Sand. 37. Which of the following Halogen Acids is strongest one? A) Hydrofluoric Acid (HF). B) Hydrobromic Acid (HBr). C) Hydroiodic Acid (HI). D) Hypochlorous Acid (HClO). Show Answer Correct Answer: C) Hydroiodic Acid (HI). 38. Which of the following is not one of the common oxidation states of elements of group-15? A) +3. B) -3. C) -5. D) +5. Show Answer Correct Answer: C) -5. 39. Hot conc. H2SO4 acts as moderately strong oxidisingagent. It oxidises both metals and non-metals.Which of the following element is oxidised by conc.H2SO4 into two gaseous products? A) Cu. B) S. C) Zn. D) C. Show Answer Correct Answer: D) C. 40. Which of the following ion has maximum oxidising power A) ClO$_{4}$$^{-}$. B) BrO$_{4}$$^{-}$. C) IO$_{4}$$^{-}$. D) None of these. Show Answer Correct Answer: B) BrO$_{4}$$^{-}$. 41. Group 16 elements have lower value of first ionization enthalpy as compared to group 15 elements because A) Half filled p-orbitals in group 15 elements are more stable. B) Group 16 elements have smaller size than group 15 elements. C) Group 16 elements contain double bond while group 15 elements have triple bond. D) Group 16 elements have more no. of electrons in p-orbitals. Show Answer Correct Answer: A) Half filled p-orbitals in group 15 elements are more stable. 42. SF$_{6}$ is known but SCl$_{6}$ is not ..... A) Due to small size of fluorine six F$^{-}$ ion can be accomodated around sulphur whereas chloride ion is comparatively larger in size, therefore, there will be interionic repulsion. B) Due to absence of vacant d orbital. C) Chlorine have more electron gain enthalpy than fluorine. D) None of these. Show Answer Correct Answer: A) Due to small size of fluorine six F$^{-}$ ion can be accomodated around sulphur whereas chloride ion is comparatively larger in size, therefore, there will be interionic repulsion. 43. What is the formula of thiosulphurous acid A) H2SO5. B) H2SO4. C) H2SO3. D) H2S2O3. Show Answer Correct Answer: D) H2S2O3. 44. Chloros meaning in Greek word Is A) Orange red. B) Greenish yellow. C) Bluish green. D) Dark violet. Show Answer Correct Answer: B) Greenish yellow. 45. 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. 46. Which of the following statement is not correct about Ellingham diagram? A) It consists of plots of ' $\Delta$. B) $\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. 47. (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) Treating Mg$_{3}$N$_{2}$ with H$_{2}$O. C) Heating NH$_{4}$NO$_{3}$. D) Treating H$_{2}$O$_{2}$ with NaNO$_{2}$. Show Answer Correct Answer: A) Heating NH$_{4}$NO$_{2}$. 48. 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. 49. SO2 can be dried by A) H2SO4. B) CaO. C) H3PO4. D) NONE OF THESE. Show Answer Correct Answer: A) H2SO4. 50. Nitrogen dioxide is A) Coloured. B) Paramagnetic. C) Both. D) None. Show Answer Correct Answer: C) Both. 51. What is the formula for the phosphate ion? A) PO$_{4}$$^{3-}$. B) PO$_{3}$$^{-}$. C) PO$_{2}$$^{-}$. D) PO$_{3}$$^{2-}$. Show Answer Correct Answer: A) PO$_{4}$$^{3-}$. 52. Which of the following oxides is anhydride of nitrous acid? A) NO. B) N$_{2}$O$_{3}$. C) NO$_{2}$. D) N$_{2}$O$_{4}$. Show Answer Correct Answer: B) N$_{2}$O$_{3}$. 53. Which of the following pairs of ions are isoelectronic and isostructural? A) CO$_{3}$$^{2-}$, NO$_{3}$$^{-}$. B) ClO$_{3}$$^{-}$, SO$_{3}$$^{2-}$. C) ClO$_{3}$$^{-}$, CO$_{3}$$^{2-}$. D) SO$_{3}$$^{2-}$, NO$_{3}$$^{-}$. Show Answer Correct Answer: A) CO$_{3}$$^{2-}$, NO$_{3}$$^{-}$. 54. Which alkali metal is the strongest reducing agent? A) Rubidium. B) Potassium. C) Sodium. D) Lithium. Show Answer Correct Answer: D) Lithium. 55. Correct conditions for Contact Process are A) 2 bar pressure, 720 K temperature & Fe catalyst. B) 2 bar pressure, 120 K temperature & V$_{2}$O$_{5}$ catalyst. C) 2 bar pressure, 720 K temperature & V$_{2}$O$_{5}$ catalyst. D) 200 bar pressure, 720 K temperature & V$_{2}$O$_{5}$ catalyst. Show Answer Correct Answer: C) 2 bar pressure, 720 K temperature & V$_{2}$O$_{5}$ catalyst. 56. 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) HOPO$_{3}$, H$_{2}$PO$_{2}$. B) H$_{3}$PO$_{3}$, H$_{3}$PO$_{4}$. C) HPO$_{3}$, H$_{3}$PO$_{3}$. D) H$_{3}$PO$_{4}$, H$_{3}$PO$_{3}$. Show Answer Correct Answer: D) H$_{3}$PO$_{4}$, H$_{3}$PO$_{3}$. 57. Among the following the first ionisation energy is maximum for A) P. B) N. C) AS. D) Bi. Show Answer Correct Answer: B) N. 58. Which of the following compounds is often used as a non-aqueous solvent A) SO2(l). B) SeO2 (l). C) CO2(l). D) SO3(l). Show Answer Correct Answer: A) SO2(l). 59. How many P-O-P bonds appear in cyclotrimetaphophoric acid? A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: D) 3. 60. What is the oxidation number of Oxygen in OF$_{2}$? A) +1. B) 0. C) +2. D) -2. Show Answer Correct Answer: A) +1. ← PreviousNext →Related QuizzesScience QuizzesClass 12 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books