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Practice Test -1

Welcome to your p block elements

1. 
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?

2. 
Which of the following is used as rocket fuel?

3. 
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:

4. 
Process for separating white P from red P:

5. 
P₂O₅ heated with water gives:

6. 
Oxy acid forming hydride on heating:

7. 
Red phosphorus is less reactive than yellow phosphorus because:

8. 
The strongest reducing agent among the following is:

9. 
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?

10. 
“Pearl White” contains an element of VA group. The element used is:

11. 
A hydride of nitrogen which is acidic:

12. 
Which is NOT a redox reaction?

13. 
In which compound is phosphorus in its lowest oxidation state?

14. 
The molecular nitrogen is not reactive due to:

15. 
Industrial preparation of nitric acid (Ostwald process) involves:

16. 
Iron with conc. HNO₃:

17. 
Oxidation number of Mn in MnO₄²⁻?

18. 
In liquid NH₃:

19. 
Which of the following is used as rocket fuel?

20. 
Which of the following does not exhibit allotropy?

21. 
The bonds present in N₂O₃ are:

22. 
Which is an acid?

23. 
PCl₅ is possible but NCl₅ does not exist because:

24. 
Property shared by white & red phosphorus:

25. 
Which of the following is used in smoke screens?

26. 
Which is an acid?

27. 
Standard electrode potential of which is highest positive?

28. 
Oxy acid forming hydride on heating:

29. 
In dilute aqueous solution, nitric acid exists as:

30. 
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:

31. 
Molecular formula of white phosphorus:

32. 
Ammonia reacts with sodium hypochlorite to give:

33. 
Lightning bolts in atmosphere cause the formation of:

34. 
Hydrogen atoms attached to P in hypophosphorous acid:

35. 
Property shared by white & red phosphorus:

36. 
Which does NOT have N–N bond?

37. 
Dinitrogen trioxide is:

38. 
Oxy acid forming hydride on heating:

39. 
Dinitrogen trioxide is:

40. 
Nausadar is:

41. 
In which compound is phosphorus in its lowest oxidation state?

42. 
Which of the following is used in smoke screens?

43. 
NH₄Cl heated → vapors turn litmus blue then red because of:

44. 
Which is used as fertilizer?

45. 
In dilute aqueous solution, nitric acid exists as: