The p-Block Elements

Bihar Board Class 12 · Chemistry · 73 past questions

53 of 73 · show all

1. Q1 2026 Set A

   The extensive use of $P_4O_{10}$ is done as

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2. Q2 2026 Set A

   Which of the following oxides is the most acidic ?

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3. Q3 2026 Set A2024 Set D

   Which of the following has the highest bond energy ?

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4. Q4 2026 Set A

   Sulphur molecule is

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5. Q7 2026 Set A

   Which of the following noble gases can most easily be liquefied ?

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6. Q8 2026 Set A

   The peroxy acid of sulphur is

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7. Q9 2026 Set A

   In which of the following processes is nitric acid manufactured from ammonia ?

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8. Q10 2026 Set A2019 Set D

   Which of the following gases cannot be collected over water ?

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9. Q11 2026 Set A

   Which of the following is formed by the reaction of Hg with ozone ?

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10. Q12 2026 Set A

    The bleaching property of chlorine is due to

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11. Q13 2026 Set A

    The outermost electronic configuration of inert gases is

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12. Q16 2025 Set D

    Ammonia can be dried by

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13. Q17 2025 Set D

    The hybridization of S in SO$_3$ is

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14. Q18 2025 Set D

    The maximum covalency of nitrogen is

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15. Q19 2025 Set D

    The number of unpaired electrons in one molecule of liquid oxygen is

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16. Q20 2025 Set D

    The most abundant noble gas in atmosphere is

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17. Q21 2024 Set D

    Which of the following elements has electronic configuration $1s^2\, 2s^2\, 2p_x^1\, 2p_y^1\, 2p_z^1$ ?

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18. Q22 2024 Set D

    Which of the following oxides of nitrogen is called laughing gas ?

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19. Q23 2024 Set D

    Which of the following is the molecular formula of Orthophosphoric acid ?

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20. Q24 2024 Set D

    The structure of $XeF_4$ is

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21. Q27 2023 Set F

    Which of the following is a radioactive noble gas ?

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22. Q28 2023 Set F

    By which of the following noble gases the maximum number of compounds have been formed ?

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23. Q29 2023 Set F

    Which of the following is a polar compound ?

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24. Q30 2022 Set E

    Which of the following is the gas with lowest boiling point ?

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25. Q32 2022 Set E

    The oxidation state of S in S$_8$ is

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26. Q35 2022 Set E

    Which of the following is coloured ?

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27. Q38 2021 Set A

    The strongest acid is

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28. Q40 2021 Set A

    The elements of group 16 are known as

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29. Q41 2019 Set D

    PCl$_5$ is a -

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30. Q42 2019 Set D

    The formula of Nitric acid is -

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31. Q43 2019 Set D

    H$_2$SO$_4$ is a -

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32. Q44 2019 Set D

    Nitrogen & Oxygen are -

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33. Q45 2019 Set D

    White and yellow phosphorous are -

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34. Q46 2019 Set D

    The hybridisation of N in $NH_3$ is -

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35. Q47 2019 Set D

    Which of the following gas is mono-atomic?

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36. Q48 2019 Set D

    Nitric acid is prepared by -

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37. Q49 2019 Set D

    Oleum is composed of H$_2$SO$_4$ and which constituent?

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38. Q50 2019 Set D

    Ammonia changes the moist red litmus paper into -

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39. Q51 2018

    The product obtained when silica reacts with hydrogen fluoride is-

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40. Q52 2018

    Mercuric chloride reacts with ammonia gas and forms white precipitate. The molecular formula of white…

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41. Q54 2018

    Most stable oxidation state of Bismuth is-

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42. Q56 2018

    Nitrogen forms only $NCl_3$ but phosphorous forms $PCl_3$ and $PCl_5$ both. Explain.

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43. Q59 2018

    Write the chemical reaction of $NH_3$ gas with aqueous $CuSO_4$ and $AgNO_3$ solutions respectively.

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44. Q60 2018

    HI is stronger acid than HF. Explain.

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45. Q61 2017

    Which of the following is Tribasic ?

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46. Q64 2016

    Chemical name of borax is

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47. Q65 2016

    Good conductor of electricity and heat is

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48. Q66 2016

    In which of the following allotropes of carbon, percentage of carbon is maximum?

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49. Q67 2016

    The hybridization of carbon in diamond is

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50. Q68 2016

    Catenation property is maximum in

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51. Q69 2015

    The shape of XeF$_4$ is

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52. Q71 2015

    Which one of the following does not form hydrogen bonding?

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53. Q73 2015

    $H_2SO_4$ is a/an

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