Question

The ionization energy of Group 2 elements decrease and the radii decrease down the group. Therefore a. The metals are less easily oxidized down the group b. The metals are more easily oxidized down the group c. Redox properties do not change systematically down the group Which Group 2 element DOES NOT form ionic hydrides? a. Ca b. Sr e. Be What is the pH of a saturated solution of Ca(OH)? The solubility of Ca(OH) is 2.1x10-3M a. 11.02 b. 11.32 c. 11.63 Group 2 carbides react with water to form a. CO gas b. He gas c. Hydrocarbon gas Which of the listed groups of compounds are Grignard reagents? a. Alkyl- and arylberyllium compounds b. Alkyl- and arylmagnesium compounds c. Alkyl- and arylcalcium compounds What is the difference between B and the other group 13 elements? a. Bis nonmetallic; all remaining elements are distinctly metallic b. There is no difference; all elements are metallic c. There is no difference; all elements are nonmetallic Boron and Group 14's silicon have similar properties. This phenomenon is called a. A diagonal relationship b. An intergroup relationship C. An interperiodic relationship Boron halides are a. Weak Lewis acids b. Strong Lewis acids c. Strong Lewis bases Compounds containing B-N bonds are isoelectronic with compounds containing a. C-N bonds b. C-C bonds C. B-B bonds The Al compound used in the Friedel-Crafts reaction is a. All b. AlCl3 c. Aleos

Answer 1

PH + POH FILE 1) Ionization energy of group 2 elements decreases and the radei increases down the group. This is due to metals are more easily oxidized down the group. option b is correct. 2) Group 2 element does not form ionic hydride is Berylummetal. 3) CaloH) → carat gou [oh} = 2x21x10²m 4:2x16²m poHs Hlog (4.28163) 2.38 PH=16-2:38 = 11.62 4) Group 2 Carbides react with water to form C Calz + Ho CaOH₂ + 3H2(g) (Hydrocarbon gas ) 5) Grignard reagents are Alkyl and Aryl magnesiuem compounds R-mgx Gir= Akyl (ar) Aryl , 1 x = halogen atom 6) Difference between Boron & other its group elements A) Boron is non-metallic, remaining all are destinetly metallic. 7) Boron and Groces in's Silicon have similar properties, this phenomenon is called as Diagonal relationship. 8) Beron halides are stomg lewih acids because they contain one Vacant orbital and ready to accept a pair of electrons. Lewisaudi electron pair acceptors are called as lewis acide 9) B-Ne bond in iso electronic with c-c bondo Both are howing & electrons during bond formation. to) All compound used in the frieded-craftes reaction in Alda Aluminium halides are good lewis ands.