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ভাব-সম্প্রসারণের ক্ষেত্রে কয়েকটি দিকের প্রতি বিশেষ দৃষ্টি দেওয়া প্রয়োজন। যেমন : প্রদত্ত চরণ বা গদ্যাংশটি একাধিকবার অভিনিবেশসহকারে পড়তে হবে। লক্ষ্য হবে প্রচ্ছন্ন বা অন্তর্নিহিত ভাবটি কী, তা সহজে অনুধাবন করা...
1 Answers 6 viewsCorrect answer is (c) Iron
1 Answers 1 views(a) Kc=[PCl3] [Cl2] / [PCl5] (b) 120.48 (c) (i) equilibrium will shift on RHS. (ii) equilibrium will shift on LHS. (iii) equilibrium will shift on RHS.
1 Answers 1 views(b) calcium and phosphorus
1 Answers 1 viewsZinc can be beaten into thin sheets.
1 Answers 1 views(a) Phosphorus is a very reactive non-metal. (b) Metals are good conductors of heat and electricity. (c) Iron is more reactive than copper. (d) Metals react with acids to produce hydrogen gas.
1 Answers 1 views[Hint : Because it have polymeric structure consisting chains of P4 tetrahedra, hence denser than white P while red P is not having angular strain as in white P, hence...
1 Answers 1 views[Hint : (i) 4 (ii) Because due to presence of vacant d-orbitals in the octet of 'p', it can expand its octet to form PCl5, while N cannot expand its octet.]
1 Answers 1 viewsNitrogen owing to its small size has a tendency to form pπ−pπ multiple bonds with itself. Nitrogen thus forms a very stable diatomic molecule, N2. On moving down a group,...
1 Answers 1 viewsCatenation is much more common in phosphorous compounds than in nitrogencompounds. This is because of the relative weakness of the N−N single bond as compared to the P−P single bond....
1 Answers 1 views