p-Block Elements: JEE Main Chemistry Previous Year Questions

423 previous year questions from p-Block Elements. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite$
2. $Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?$
3. $Given below are the statements about diborane (A) Diborane is prepared by the oxidation of N a B H_{4} with I_{2} (B) Each boron atom is in s p^{2} hybridized state (\dots$
4. $A. Ammonium salts produce haze in atmosphere. B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals. C. Poly chlorinated biphenyls act as cleansing\dots$
5. $Which one of the following reactions does not come under hydrolysis type reaction?$
6. $Match List-I with List-II (matching question)$
7. $Among the following reactions of hydrogen with halogens, the one that requires a catalyst is:$
8. $Which is the correct thermal stability order for H_{2} E (E=O, S, Se, Te and Po) ?$
9. $Which of the following oxides is most acidic?$
10. $Given below are two statements: Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation state. Statement (II) : Down the group 16 stability o\dots$
11. $Which among the following group 16 elements exists in more than two allotropic states?$
12. $Given below are the oxides: N a_{2} O, A s_{2} O_{3}, N_{2} O, NO and C l_{2} O_{7} Number of amphoteric oxides is:$
13. $Diborane (B_{2} H_{6}) reacts independently with O_{2} and H_{2} O to produce, respectively;$
14. $Match List-I with List-II (matching question)$
15. $Polar stratospheric clouds facilitate the formation of:$
16. $Given below are two statements: Statement I : The decrease in first ionization enthalpy from B to Al is much larger than that from Al to Ga. Statement II : The d orbitals\dots$
17. $Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?$
18. $The correct statement about B_{2} H_{6} is:$
19. $Chlorine on reaction with hot and concentrated sodium hydroxide gives :$
20. $The structure of PC l_{5} in the solid state is:$
21. $The correct decreasing order of basicity of hydrides of Group-15 elements is$
22. $Which of the following is not oxidised by O_{3} ?$
23. $Match List-I with List-II (matching question)$
24. $Given below are two statements: Statement I: The increasing order of boiling point of hydrogen halides is HCl < HBr < HI < HF . Statement II: The\dots$
25. $The number of neutrons present in the more abundant isotope of boron is ' x'. Amorphous boron upon heating with air forms a product, in which the oxidation state of b\dots$

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p-Block Elements: JEE Main Chemistry Previous Year Questions

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