This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In case of group 16 elements stability of+5 oxidation state decreases on moving down the group this is due to A) Thermo effect. B) Inert pair effect. C) Fajan effect. D) None of the above. Show Answer Correct Answer: B) Inert pair effect. 2. Phosphine is prepared by the action of A) P & H$_{2}$SO$_{4}$. B) P & NaOH. C) P & H$_{2}$S. D) P & HNO$_{3}$. Show Answer Correct Answer: B) P & NaOH. 3. The correct order of acid strength is A) HClO4 < HClO3 < HClO2 < HClO. B) HCIO < HClO2 < HClO3 < HClO4. C) HClO4 < HClO < HClO2 < HClO3. D) (d) HClO2 < HClO3 < HClO4 < HClO. Show Answer Correct Answer: B) HCIO < HClO2 < HClO3 < HClO4. 4. At room temperature, iodine is a ..... A) Gas. B) Liquid. C) Solid. D) None of the above. Show Answer Correct Answer: C) Solid. 5. Which of the following is the decreasing order of oxidizing power of halogens A) F>Cl>Br>I. B) I>Br>Cl>F. C) I>Cl>Br>F. D) Cl>F>Br>I. Show Answer Correct Answer: A) F>Cl>Br>I. 6. Most acidic oxide among the following is- A) N2O5. B) P2O5. C) N2O4. D) As2O3. Show Answer Correct Answer: A) N2O5. 7. 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. 8. State the value of $\Delta$fH in the industrial production of ammonia by Haber process. A) -46.1 kJ mol-1. B) -198.4 kJ mol-1. C) +92.2 kJ mol-1. D) 0.00 kJ mol-1. Show Answer Correct Answer: A) -46.1 kJ mol-1. 9. What is the primary use of sodium and potassium ions in biological systems? A) Oxygen transport. B) Nerve signal transmission. C) Energy storage. D) Muscle contraction. Show Answer Correct Answer: B) Nerve signal transmission. 10. Which one of the following is an antichlor agent? A) SO2. B) SO3. C) NH3. D) PH3. Show Answer Correct Answer: A) SO2. 11. 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) Molecular weight of water is more. B) Electronegativity of sulphur is more. C) H$_{2}$S is weak acid. D) Water molecules are having weak hydrogen bonds between them. Show Answer Correct Answer: D) Water molecules are having weak hydrogen bonds between them. 12. Which of the following is correct related to the negative ion? A) The number of protons is twice the number of electrons. B) The number of electrons is greater than the number of protons. C) The number of electrons is twice the number of protons. D) The number of protons equals the number of electrons. Show Answer Correct Answer: B) The number of electrons is greater than the number of protons. 13. 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. 14. The basic character of group 15 hydrides decreases in the order A) NH$_{3}$ > PH$_{3}$ > SbH$_{3}$ > BiH$_{3}$. B) BiH$_{3}$ > SbH$_{3}$ > PH$_{3 }$> NH$_{3}$. C) NH$_{3}$ > SbH$_{3}$ > PH$_{3}$ > BiH$_{3}$. D) SbH$_{3 }$>NH$_{3}$ > PH$_{3}$ > BiH$_{3}$. Show Answer Correct Answer: A) NH$_{3}$ > PH$_{3}$ > SbH$_{3}$ > BiH$_{3}$. 15. Layer test is not shown by A) Chloride. B) Bromide. C) Iodide. D) All halides. Show Answer Correct Answer: A) Chloride. 16. 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. 17. 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$^{2}$. 18. Many of the Boron compounds are A) Electron rich. B) Electron deficient. C) Electron donor. D) None. Show Answer Correct Answer: B) Electron deficient. 19. What is the nature of carbide of silicon A) Covalent. B) Ionic. C) Metallic. D) Van der waals. Show Answer Correct Answer: A) Covalent. 20. Which of the following is a interstitial carbide A) WC. B) SiC. C) Al4C3. D) Be2C. Show Answer Correct Answer: A) WC. 21. Chlorine reacts with excess of ammonia to give A) NH4Cl. B) N2 + HCl. C) N2+NH4Cl. D) N2+NCl3. Show Answer Correct Answer: C) N2+NH4Cl. 22. If the formula of borax is Na$_{2}$B$_{4}$O$_{x}$(OH)$_{y}$.zH$_{2}$O, then x+y+z is A) 15. B) 14. C) 16. D) 17. Show Answer Correct Answer: D) 17. 23. Which Group 16 element is a gas at room temperature? A) Oxygen. B) Tellurium. C) Selenium. D) Sulfur. Show Answer Correct Answer: A) Oxygen. 24. Which of the following does not belong to group 18 A) Aluminium. B) Krypton. C) Radon. D) Neon. Show Answer Correct Answer: A) Aluminium. 25. 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. ← 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 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