Wednesday 15 November 2017

Explanation of remaining MCQs

Q.3
All types of chemical bonds are also called true bonds like ionic bond,covalent and coordinate covalent bonds.
A) In KOH ionic bond is present between K+ and OH- .The one covalent bond is present between O and H in OH- ion.
B) In H2O only two covalent bonds are present.
C) In NH4OH,the ionic bond is present between NH4+ ion and OH- ion.In OH- also one covalent bond and in NH4+ ion there is three covalent bonds between N and H atoms but one is coordinate covalent bond between N and H atom.
D)In [Co(H2O)6] hexaaqua cobalt(0) ,dative bonds are present between ligand and Co but covalent bonds are present in H2O
Q.4
The dative bond is always formed between one complete filled orbital and one half filled orbital because complete es- pair should be transfer from filled orbital to empty orbital.
Q.5
S > P is incorrect 1st ionization energy order .because we know group VA show abnormal I.E trend and group VIA has greater 1st I.E than group VA.The P has stable partially filled p-subshell due to three unpaired es- (like nitrogen) as compared to S.All other three orders are correct.

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