This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. 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. 3. What is the electron gain enthalpy for noble gases? A) > 0. B) < 0. C) = 0. D) It is not defined for noble gases. Show Answer Correct Answer: A) > 0. 4. Among the hydrides of 15th group, which is strong reducing agent? A) Ammonia. B) Phosphine. C) Arsine. D) Bismuthine. Show Answer Correct Answer: D) Bismuthine. 5. 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. 6. 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. 7. The oxidation state of S in the anions SO$^{2-}$$_{3}$, S$_{2}$O$^{2-}$$_{4}$ & S$_{2}$O$^{2-}$$_{6}$ follows the order A) S$_{2}$O$^{2-}$$_{6}$< S$_{2}$O$^{2-}$$_{4}$< SO$^{2-}$$_{3}$. B) S$_{2}$O$^{2-}$$_{4}$< SO$^{2-}$$_{3}$< S$_{2}$O$^{2-}$$_{6}$. C) SO$^{2-}$$_{3}$< S$_{2}$O$^{2-}$$_{4}$< S$_{2}$O$^{2-}$$_{6}$. D) S$_{2}$O$^{2-}$$_{4}$< S$_{2}$O$^{2-}$$_{6}$< SO$^{2-}$$_{3}$. Show Answer Correct Answer: B) S$_{2}$O$^{2-}$$_{4}$< SO$^{2-}$$_{3}$< S$_{2}$O$^{2-}$$_{6}$. 8. $_{88}$Ra$^{226}$ $\rightarrow$ $_{86}$Rn$^{222}$ + X . Identify X A) $\beta$ particle. B) $\alpha$ particle. C) Positron. D) $_{2}$He$^{4}$. Show Answer Correct Answer: D) $_{2}$He$^{4}$. 9. Identify the reason for Noble gases to have low boiling point. A) No inter atomic force of attraction. B) Weak dispersion forces of attraction. C) Monatomic gases. D) Unreactive gases. Show Answer Correct Answer: B) Weak dispersion forces of attraction. 10. 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. 11. What is the trend in electronegativity across the P block? A) Electronegativity increases down the P block. B) Electronegativity increases across the P block from left to right. C) Electronegativity decreases across the P block from left to right. D) Electronegativity remains constant across the P block. Show Answer Correct Answer: B) Electronegativity increases across the P block from left to right. 12. 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) N$_{2}$O NO$_{2}$ 3HI. B) 2NO N$_{2}$O 2HIO$_{3}$. C) N$_{2 }$ NO$_{2}$ HI. D) 2NO$_{2}$ NO 5HIO$_{3}$. Show Answer Correct Answer: B) 2NO N$_{2}$O 2HIO$_{3}$. 13. What is the name of the following ion?ClO$_{3}$ $^{-}$ A) Chlorate ion. B) Chloride ion. C) Chlorite ion. D) Perchlorate ion. Show Answer Correct Answer: A) Chlorate ion. 14. 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. 15. A brown ring is formed in the ring test for $NO_3^-$ A) $\left[Fe\left(\left[\left(H_2O\right)_5\left(NO\right)\right]^{2+}\right)\right]$. B) $FeSO_4NO_2$. C) $\left[Fe\left(\left[\left(H_2O\right)_4\left(NO\right)_2\right]^{2+}\right)\right]$. D) $FeSO_4HNO_3$. Show Answer Correct Answer: A) $\left[Fe\left(\left[\left(H_2O\right)_5\left(NO\right)\right]^{2+}\right)\right]$. 16. The molecule XeF6 has the following structure A) Square pyramidal. B) Pyramidal. C) Distorted octahedral. D) Square planar. Show Answer Correct Answer: C) Distorted octahedral. 17. Which one of these is an silicon oxide??? A) Gold. B) Sand. C) Silver. D) Wood. Show Answer Correct Answer: B) Sand. 18. Which of the following Halogen Acids is strongest one? A) Hydroiodic Acid (HI). B) Hypochlorous Acid (HClO). C) Hydrofluoric Acid (HF). D) Hydrobromic Acid (HBr). Show Answer Correct Answer: A) Hydroiodic Acid (HI). 19. Which of the following is not one of the common oxidation states of elements of group-15? A) -3. B) -5. C) +5. D) +3. Show Answer Correct Answer: B) -5. 20. 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) C. D) Zn. Show Answer Correct Answer: C) C. 21. 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}$$^{-}$. 22. Group 16 elements have lower value of first ionization enthalpy as compared to group 15 elements because A) Half filled p-orbitals in group 15 elements are more stable. B) Group 16 elements have smaller size than group 15 elements. C) Group 16 elements contain double bond while group 15 elements have triple bond. D) Group 16 elements have more no. of electrons in p-orbitals. Show Answer Correct Answer: A) Half filled p-orbitals in group 15 elements are more stable. 23. SF$_{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. 24. What is the formula of thiosulphurous acid A) H2SO3. B) H2SO4. C) H2SO5. D) H2S2O3. Show Answer Correct Answer: D) H2S2O3. 25. Chloros meaning in Greek word Is A) Greenish yellow. B) Bluish green. C) Orange red. D) Dark violet. Show Answer Correct Answer: A) Greenish yellow. ← 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 8Class 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