This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the primary reason for the high reactivity of alkali metals? A) High density. B) High atomic mass. C) Low ionization enthalpy. D) High electronegativity. Show Answer Correct Answer: C) Low ionization enthalpy. 2. Which of the following orders are correct as per the properties mentioned against each? A) (i) N$_{2}$O$_{4}$< N$_{2}$O$_{3}$ < NO < N$_{2}$O (Acid strength). B) (ii) AsH$_{3}$ < PH$_{3 }$< NH$_{3}$ (Enthalpy of vapourisation). C) (iii) S < O < Cl < F (More negative electron gain enthalpy). D) (iv) H$_{2}$O > H$_{2}$S > H$_{2}$Se > H$_{2}$Te ( Thermal stability). Show Answer Correct Answer: D) (iv) H$_{2}$O > H$_{2}$S > H$_{2}$Se > H$_{2}$Te ( Thermal stability). 3. Group 16 elements are also known as A) Oxygen family. B) Boron family. C) Nitrogen family. D) Carbon family. Show Answer Correct Answer: A) Oxygen family. 4. *Which of the following ion is diamagnetic in nature? A) Fe$^{+3 }$. B) Sc $^{+3}$. C) Cr$^{+2}$. D) Cu$^{+2}$. Show Answer Correct Answer: B) Sc $^{+3}$. 5. What color does lithium impart to a flame during a flame test? A) Yellow. B) Crimson red. C) Violet. D) Blue. Show Answer Correct Answer: B) Crimson red. 6. Explain the concept of hybridization in P block elements. A) Hybridization in P block elements is the mixing of atomic orbitals to create new hybrid orbitals for bonding. B) Hybridization in P block elements involves the loss of electrons during bonding. C) P block elements do not undergo hybridization in their bonding processes. D) Hybridization is only applicable to S block elements and not to P block elements. Show Answer Correct Answer: A) Hybridization in P block elements is the mixing of atomic orbitals to create new hybrid orbitals for bonding. 7. The most common oxidation state of lanthanoids is-: A) +4. B) +3. C) +6. D) +2. Show Answer Correct Answer: B) +3. 8. Which element is the most electronegative element in p-block A) Chlorine. B) Bromine. C) Fluorine. D) Nitrogen. Show Answer Correct Answer: A) Chlorine. 9. Number of electron deficient molecules among the following PH$_{3}$, B$_{2}$H$_{6}$, CCI$_{4}$, NH$_{3}$, LiH and BCl$_{3}$, is A) 0. B) 1. C) 2. D) 3. Show Answer Correct Answer: C) 2. 10. Which of the following statements is not true about Group 1 elements? A) The elements form basic oxides. B) The elements have the same oxidation number. C) Reactivity of elements increases down the group. D) The ionisation energy increases down the group. Show Answer Correct Answer: D) The ionisation energy increases down the group. 11. Which of the following properties decreases going down the group? A) Boiling point. B) Reactivity. C) Melting point. D) Atomic radius. Show Answer Correct Answer: B) Reactivity. 12. Boron shows diagonal relation with A) Silicon. B) Carbon. C) Aluminium. D) Neon. Show Answer Correct Answer: A) Silicon. 13. Pick the odd man out A) In. B) Pb. C) Cl. D) Al. Show Answer Correct Answer: C) Cl. 14. Which noble gas has the lowest boiling point? A) Neon. B) Helium. C) Argon. D) Krypton. Show Answer Correct Answer: B) Helium. 15. Assertion:Noble gases have very low boiling point.Reason:They have very weak interatomic forces. A) Assertion and Reason are true & Reason is the correct explanation of Assertion. B) Assertion and Reason are true but Reason is not correct explanation of Assertion. C) Assertion is correct but Reason is incorrect. D) Assertion is incorrect but Reason is correct. Show Answer Correct Answer: A) Assertion and Reason are true & Reason is the correct explanation of Assertion. 16. What is the general electronic configuration of p-block elements? A) Ns1-2. B) Ns2 np1-6. C) Ns2 nd1-10. D) Ns2 np6. Show Answer Correct Answer: B) Ns2 np1-6. 17. Fluorine is the best oxidizing agent because it has A) Highest electron affinity. B) Highest reduction potential. C) Highest oxidation potential. D) Lowest electron affinity. Show Answer Correct Answer: B) Highest reduction potential. 18. Identify which of the following is NOT the characteristic property of the Noble gases. A) Very High ionisation Enthalpy. B) Large negative electron gain Enthalpy. C) Odourless. D) Sparingly soluble in water. Show Answer Correct Answer: B) Large negative electron gain Enthalpy. 19. Identifying the incorrect statement about oxides formed by p-block elements: A) Silicon dioxide is an example of a p-block oxide exhibiting acidic properties. B) Beryllium oxide displays basic characteristics, aligning with its position in the p-block. C) Aluminum oxide is amphoteric, reacting with both acids and bases. D) None of the above. Show Answer Correct Answer: B) Beryllium oxide displays basic characteristics, aligning with its position in the p-block. 20. Which element is the first member of Group 15? A) Nitrogen. B) Oxygen. C) Sulfur. D) Phosphorus. Show Answer Correct Answer: A) Nitrogen. 21. The diagonal relationship between Li and Mg is due to: A) Similar atomic size and charge density. B) Same electronic configuration. C) Presence in the same group. D) Similar melting points. Show Answer Correct Answer: A) Similar atomic size and charge density. 22. The critical temperature of water is higherthan that of O2 because the H2O moleculehas-[IIT-1997] A) Fewer electrons than O2. B) Two covalent bonds. C) V-shape. D) Dipole moment. Show Answer Correct Answer: D) Dipole moment. 23. Which of the following elements can be involved in $p\pi\-d\pi$ A) Carbon. B) Nitrogen. C) Phosphorus. D) Boron. Show Answer Correct Answer: C) Phosphorus. 24. 1 How many valence electrons are in the element iodine? A) 1. B) 7. C) All the above. D) None of the above. Show Answer Correct Answer: B) 7. 25. No. of lone pairs on the central atom and geometry of BrF$_{5}$ are respectively A) 0 and square planar. B) 1 and square pyramidal. C) 0 and square pyramidal. D) 1 and trigonal bipyramidal. Show Answer Correct Answer: B) 1 and square pyramidal. ← 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 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 10Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books