This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. As you move down the group, halogens' reactivity ..... A) Increases. B) Decreases. C) Doesn't change. D) Shows no trend. Show Answer Correct Answer: B) Decreases. 2. The most stable oxidation states of nitrogen are A) -3, +3, +5. B) -3, 0 and-1. C) -3, +3and 0. D) 3, +3 and-5. Show Answer Correct Answer: A) -3, +3, +5. 3. What is the name of the following ion?S$^{2-}$ A) Sulfur (II) ion. B) Sulfide ion. C) Sulfate ion. D) Sulfur ion. Show Answer Correct Answer: B) Sulfide ion. 4. In the preparation of compounds of Xe, Bartlett had taken O2$^{+}$PtF6$^{-}$ as a base compound. This is because A) (i) both O2 and Xe have same size. B) (ii) both O2 and Xe have same electron gain enthalpy. C) (iii) both O2 and Xe have almost same ionisation enthalpy. D) (iv) both Xe and O2 are gases. Show Answer Correct Answer: C) (iii) both O2 and Xe have almost same ionisation enthalpy. 5. Helium is a good insulator. Why? A) Helium do not contains mobile ions. B) Helium do not contains mobile electrons. C) Helium is not inert. D) Helium is light. Show Answer Correct Answer: B) Helium do not contains mobile electrons. 6. Advait is studying the atomic radii of Al in his chemistry class. A) 143pm. B) 135pm. C) 170pm. D) 167pm. Show Answer Correct Answer: A) 143pm. 7. Which property of halogen decreases down the group? A) Bond energy of the hydrogen halogen bond. B) Thermal stability. C) Boiling point. D) Reducing ability of halides. Show Answer Correct Answer: A) Bond energy of the hydrogen halogen bond. 8. Which of the following species has the highest dipole moment? A) NH3. B) PH3. C) AsH3. D) SbH3. Show Answer Correct Answer: A) NH3. 9. Which of the following shows N in its increasing order of oxidation no.? A) N$_{2}$O B) NH$^{+}$$_{4}$< NO C) NH$^{+}$$_{4}$< N$_{2}$O< NO D) NH$^{+}$$_{4}$ Show Answer Correct Answer: C) NH$^{+}$$_{4}$< N$_{2}$O< NO 10. Copper on reaction with dilute HNO$_{3}$ gives x and Copper on reaction with concentrated HNO$_{3}$ gives y. Identify x and y. A) X = NO2, y = N2O. B) X = N2O, y = NO. C) X = NO, y = NO2. D) X = N2O, y = NO2. Show Answer Correct Answer: C) X = NO, y = NO2. 11. Abnormal behaviour of B, C, N, O anf F is due to A) Small size. B) High electronegativity. C) Absence of d orbitals. D) All of the above. Show Answer Correct Answer: D) All of the above. 12. The explosive formed when NH3 reacts with excess Cl2 is A) NCl2. B) NCl3. C) NH4Cl. D) NCl5. Show Answer Correct Answer: B) NCl3. 13. The structure of white phosphorus is A) Pyramidal. B) Tetrahedral. C) Square planar. D) Trigonal planar. Show Answer Correct Answer: B) Tetrahedral. 14. The maximum covalency of Nitrogen is A) -3. B) +3. C) +5. D) +4. Show Answer Correct Answer: D) +4. 15. What is the shape of XeF2 A) Triangular planar. B) Tetrahedral. C) Linear. D) Octahedral. Show Answer Correct Answer: C) Linear. 16. Al4C3 on hydrolysis give A) CH4. B) C2H6. C) C2H4. D) C2H2. Show Answer Correct Answer: A) CH4. 17. Which of the following oxides of nitrogen is the anhydride of HNO3 a. N$_{2}$O b. NO c. N$_{2}$O$_{5 }$ d. N$_{2}$O$_{3}$ A) N$_{2}$O. B) NO. C) N$_{2}$O$_{5}$. D) N$_{2}$O$_{3}$. Show Answer Correct Answer: C) N$_{2}$O$_{5}$. 18. . Which of the following factors would favor the formation of ammonia in Haber's process? A) Low temperature. B) Low pressure. C) High pressure. D) High volume. Show Answer Correct Answer: C) High pressure. 19. What is the formula for the following ion:selenide ion A) Se$^{+}$. B) Se$^{-}$. C) Se$^{2-}$. D) Se$^{2+}$. E) SeO$_{3}$$^{2-}$. Show Answer Correct Answer: C) Se$^{2-}$. 20. The maximum covalency of N is A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: B) 4. 21. Ionisation enthalpy of group 15 elements is greater than group 16 elements due to A) Completely filled and half filled orbitals of group15 elements. B) Completely filled and fully filled orbitals of group15 elements. C) Both of the above. D) None of the above. Show Answer Correct Answer: A) Completely filled and half filled orbitals of group15 elements. 22. The oxidation numbers of sulphur in S8, S2F2, H2S, respectively, are-[IIT-1999] A) 0, + 1 and-2. B) + 2, + 1 and-2. C) 0, + 1 and + 2. D) -2, + 1 and-2. Show Answer Correct Answer: A) 0, + 1 and-2. 23. Which of the following p-block elements is a metalloid? A) Carbon. B) Silicon. C) Oxygen. D) Sulphur. Show Answer Correct Answer: B) Silicon. 24. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from A) Zero to-1 and zero to +3. B) Zero to + 1 and zero to-3. C) Zero to + 1 and zero to-5. D) Zero to-1 and zero to +5. Show Answer Correct Answer: D) Zero to-1 and zero to +5. 25. What type of bond do crown ethers primarily form with cations? A) Electrostatic. B) Covalent. C) Hydrogen. D) Ionic. Show Answer Correct Answer: A) Electrostatic. Next →Related QuizzesClass 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 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