Electronic configuration and general trends, Group 13 and 14
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See all →- Given below are two statements :Statement I : The nutrient deficient water bodies lead to eutrophication.Statement II : Eutrophication leads to decrease in the level of oxygen in the water bodies.In the light of the above statements, choose the corre… Answer: 1. Statement I is incorrect but Statement II is true. Key idea: Eutrophication is caused by nutrient enrichment. Statement I is fals... 1
- Taking stability as the factor, which one of the following represents correct relationship? Answer: 1. TlI > TlI ₃ Key idea: In group 13 the +1 state becomes more stable down the group because of the inert pair effect; for Tl, +1 is... 1
- Match List - I with List - II :List - I: A. Coke B. Diamond C. Fullerene D. GraphiteList - II: I. Carbon atoms are sp^3 hybridised. II. Used as a dry lubricant III. Used as a reducing agent IV. Cage like moleculesChoose the correct answer from the op… Answer: 4. A-III, B-I, C-IV, D-II Key idea: Match each form of carbon with its structure or use. A. Coke is used as a reducing agent in meta... 1
- Match List - I with List - II.List - I (Hydrides): (a) MgH_2 (b) GeH_4 (c) B_2H_6 (d) HFList - II (Nature): (i) Electron precise (ii) Electron deficient (iii) Electron rich (iv) IonicChoose the correct answer from the options given below : Answer: 2. (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii) Key idea: classify hydrides by electron count. MgH₂ : metal hydride of s-block, io... 1
- Which of the following statement is not correct about diborane ? Answer: 1. Both the Boron atoms are sp² hybridised. Key idea: in diborane each boron is sp³ hybridised, not sp² . Each B uses four sp³ orbit... 1
- Choose the correct statement : Answer: 4. Diamond is sp³ hybridised and graphite is sp² hybridized. Key idea: diamond and graphite are both covalent forms of carbon with d... 1