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Class 12 Chemistry: P-Block Elements
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MCQs on group 15, 16, 17 and 18 elements, dinitrogen, ammonia, nitrogen oxides, nitric acid, phosphorus and sulphur allotropic forms, sulphuric acid, phosphine, phosphorus halides, phosphorus, sulphur and halogens oxoacids, dioxygen, chlorine, hydrogen chloride and interhalogen compounds.

Class 12 Chemistry: P-Block Elements
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25 Questions

1. Which of the following conditions is the most suitable for manufacture of sulfuric acid in contact process?
2. Which allotrope of phosphorus is the most reactive?
3. Why is helium added to oxygen which is used by deep-sea divers?
4. Who first recognized sulfur as an element?
5. Which of the following is the most popular oxoacid of sulfur?
6. When a flask containing sodium thiosulfate is placed over a paper marked with 'X' and HCl added to it, the 'X' seems to disappear when looked through the flask. Why?
7. What is formed when amphoteric oxides react with an alkali solution?
8. Like white phosphorus, which phosphorus also exists as P4?
9. What class of compounds do the oxygen based compounds of sulfur represent?
10. What is the name of the process of extracting sulfur on commercial scale?
11. Which of the following is used for vulcanization purposes in the rubber industry?
12. What is the primary product when carbon is treated with concentrated sulfuric acid?
13. What is the correct order of enthalpy of dissociation of halogens?
14. What is the first step involved in forming sulphuric acid through contact process?
15. Which of the following is not a property of sulfur dioxide?
16. What type of agent is PCl5 when it reacts with H2?
17. What does dinitrogen oxide on reaction with sodamide produce?
18. What is the starting substance fed into the electrolytic cell in Hall-Heroult process?
19. What is the correct order of reactivity of group 16 elements?
20. Which of the following is a photosensitive element?
21. Which of the following is not an oxoacid of chlorine?
22. What is the primary constituent of sand?
23. Which of the following oxoacid sulfur is known not to bear any acid salt?
24. Why is sulfur trioxide not dissolved in water and but treated with existing sulfuric acid?
25. What is the primary component of food preservative E220?

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