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The P - Block Elements (Group 15 - 16 - 17 - 18)
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The P - Block Elements (Group 15 - 16 - 17 - 18)
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25 Questions

1. In which of the following arrangements thegiven sequence is not strictly according to theproperty indicated against it? [2012]
2. Bleaching powder reacts with a few drops ofdilute HCl to give [1989]
3. Number of electrons shared in the formationof nitrogen molecule is [1992]
4. Polyanion formation is maximum in [1994]43About 20 km above the earth - there is anozone layerWhich one of the followingstatements about ozone and ozone layer is true?[1995]
5. Aone litre flask is full of brown brominevapourThe intensity of brown colour of vapourwill not decrease appreciably on adding to theflask some [1998]
6. H3 PO2 is the molecular formula of an acid of phosphorusIts name and basicity respectively are [1992]
7. Asolution of potassium bromide is treatedwith each of the followingWhich one wouldliberate bromine? [1993]
8. When orthophosphoric acid is heated to600°C - the product formed is [1989]
9. Hypo is used in photography to [1988]
10. Which is the strongest acid in the following:[2013]
11. Which one of the following compounds is aperoxide? [2010]
12. PCl3 reacts with water to form [1991]
13. By passing H 2Sgas in acidified KMnO4solution - we get [1995]
14. The formula for calcium chlorite is [1994]
15. P2O5 is heated with water to give [1991]
16. Which one of the following oxides ofchlorine is obtained by passing dry chlorine oversilver chlorate at 90°C? [1994]
17. Sugarcane on reaction with nitric acid gives[1992]
18. Sulphur trioxide can be obtained by which of the following reaction: [2012]
19. Which among the following is paramagnetic?[1994]
20. Which of the following is a polar molecule?[2013]
21. The bleaching action of chlorine is due to[1991]
22. Noble gases do not react with otherelements because [1994]
23. Which one of the following arrangementsdoes not give the correct picture of the trendsindicated against it? [2008]
24. During its reactions - ozone [1999]
25. Which of the following is a nitric acidanhydride? [1988]