Which of the following displacement reactions can occur?
)a) cuso4 +ag cu +agso4
)b) 2ba(no3)2 + zn 2ba + zn (no3)2
)c) 2agno3 + zn 2ag + zn(no3) 2
)d) mgso4 + zn znso4 + mg
)e) 2nano3 + zn 2na + zn(no3) 2

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°