Chemistry - Complete s-block Question with Solution | TestHub
Match given properties with elements
List-I (Properties) | List-I (Elements) |
|---|---|
(P) Produce stable M2O type oxide with limited supply of air | 1. Li, Be, Al |
(Q) Chloride of elements produce red colour in oxidising flame | 2. Li, Ca, Sr |
(R) Chlorides of such elements having significant covalent character or covalent nature in anhydrous form | 3. Na, Li, Cs |
Match list-I and list-II and give your answer as abc where a,b and c are the match of 1, 2, 3 from list-II. (for example Matching of P is = 2, Q = 3 & R = 1 then your answer is 231)
Options:
Answer:
Solution:
P matches with 3 (Na, Li, Cs) because alkali metals form stable M₂O type monoxides when reacted with a limited supply of air.
Q matches with 2 (Li, Ca, Sr) since these specific metal chlorides impart a characteristic red color (crimson or brick red) to an oxidizing flame.
R matches with 1 (Li, Be, Al) because small ions with high charge density (, , ) strongly polarize anions, giving their anhydrous chlorides significant covalent character.
Therefore, the correct matching sequence is 321.
