1) what do alkali metals do when they become ions?a) lose one electronb)lose two electronsc) gain one electrond) gain two electrons2) which statement is true?a)neon accepts one electron when it becomes ionb)aluminum accepts three electrons when it becomes ionc)iodine accepts one electron when it becomes iond)nitrogen accepts two electrons when it becomes ion3) which of the following is an acid?a) CH3OHb)CH3COHc)CH3COOHd)CH3CCIH3)which is a salt?a)BeCl2b) BrCl2c)BCl3d)BiCl2which is a covalent compound?a)Br2b)NaOHc)CaCl2d)Ne2
1)Alkali metals have a electronic configuration resulting in the presence of one valence electron in their valence shellFor ex: Li(Atomic number3) - 2,1 Na(Atomic number11) - 2,8,1 And metals are electropositive in nature,ie they lose an electron to form a monopositive ion(+1).It can lose only lose only one electron during ionisation since it has only one electron in its valence shell.(There is second and further ionisations which you dont have to bother about)So ur answer is a) 2) Neon being a noble gas does not accept or donateAluminium being a metal,it is electropositive like I said above and hence forms a tripositive ion(+3) which is unstable.So in order to become stable again,it accepts 3 electronsIodine is electronegative(It has tendency to lose electron),so c) is wrongNitrogen too is electronegative(It wont accept electrons)So ur answer is b) 3) -COOH is an acid group.So this one is c) -COH or -CHO is an aldehye -OH is an alcohol 4)Becl2 is a salt.Ur answer is a) Br and Cl are in the same group,both are non metals.So BrCl2 is not a saltBCl3 is not a salt.It is covalent5) Br2 is covalent.Once u find the right option,dnt worry about hte rest,go for itCaCl2 is ionicNe2 does not exist as Ne is an inert gasNaOH could be bothBut Br2 is sure shot covalentSo your answer is a)
