Page 1 - Microsoft Word - Home assignment-P Block Elements

P – BLOCK ELEMENTS

Q1. Show that Al2O3 is amphoteric in nature.
Q2. What happens when B2H6 reacts with NH3?

Q3. Diamond is very hard while graphite is soft. Explain.
Q4. White fumes appear around the bottle of anhydrous AlCl 3. Give
reason.

Q5. Why is boric acid considered as a weak acid?
Q6. What are silicones?
Q7. Is boric acid a protic acid? Explain.

Q8. Explain what happens when boric acid is heated.
Q9. Suggest a reason as to why CO is poisonous.
Q10. Draw the structure of diborane.

Q11. How would explain the lower atomic radius of Ga as
compared to Al?
Q12. What is inert pair effect?
Q13. What do you mean by catenation?

Q14. What is the hybridisation of B in B2H6 and BF3?
Q15. Which is the most stable allotropic form of carbon?
Q16. Which is the most abundant element in group-13?

Q17. Which element of group-13 forms most stable +1 oxidation
state and why?
Q18. What is inorganic benzene?
Q19. Draw the structure of Borazine?

Q20. What happens when borax is acidified with H 2SO4?
Q21. Name the most metallic and most non-metallic elements of
group-14.

Q22. Why carbon shows catenation but silicon doesn’t?
Q23. SnCl2 is an ionic compound but SnCl4 is covalent. Why?
Q24. What happens when SiCl 4 reacts with water?
Q25. Select the member of group-14 that

(i)forms the most stable acidic dioxide.
(ii)is used as semiconductor.
(iii)shows catenation.

(iii)is commonly found in +2 oxidation state.