9.Elements of Group 13 ,14 and 15
Qno. 1. Choose correct option. A. Which of the following is not an allotrope of carbon? a. bucky ball b. diamond c. graphite d. emerald B. ............ is inorganic graphite a. borax b. diborane c. boron nitride d. colemanite C. Haber’s process is used for preparation of ......... a. HNO₃ b. NH₃ c. NH₄CONH₂ d. NH₄OH D. Thallium shows different oxidation state because ......... a. of inert pair effect b. it is inner transition element c. it is metal d. of its high electronegativity E. Which of the following shows most prominent inert pair effect? a. C b. Si c. Ge d. Pb Qno.2. Identify the group 14 element that best fits each of the following description. [1 Mark Each] A. Non metallic element Ans:- Carbon(C) B. Form the most acidic oxide Ans:- Carbon C. They prefer +2 oxidation state. Ans:- Tin(Sn) and lead (pb) D. Forms strong π bonds. Ans:- Carbon Qno.3. Give reasons. A. Ga³⁺ salts are better reducing agent while Tl¹⁺ salts ar...