Qualification > Sciences
Edexcel CHEMISTRY DOUBTS!!!!
Igcseboy:
Jan 2010 MCQ 11 an 12
for 11 how can we tell ??? (for the same types if come in exam)
Kim:
--- Quote from: Igcseboy on May 19, 2010, 09:40:05 am ---Jan 2010 MCQ 11 an 12
for 11 how can we tell ??? (for the same types if come in exam)
--- End quote ---
well for 12 the answer is A because mg is a metal and oxygen a non metal
and the bonding between a metal and non metal is ionic bonding
well for 11 the answer isC although i dunno why ill see if i can figure it out
Saladin:
--- Quote from: Igcseboy on May 19, 2010, 09:40:05 am ---Jan 2010 MCQ 11 an 12
for 11 how can we tell ??? (for the same types if come in exam)
--- End quote ---
For Question 12: The bonding between a metal and a non-metal is ionic. Thus A. But the further reason is that Mg and O bonding, there is almost no distortion of the ionic bond.
For Question 11: The nickel ion is green in color. And since it has a positive charge, it will go towards the negative electrode. The sulphate ion however, is colorless, and thus, even if it goes to the negative electrode, you cannot see it. Thus the answer is C.
Igcseboy:
--- Quote from: Engraved on May 19, 2010, 10:14:52 am ---For Question 12: The bonding between a metal and a non-metal is ionic. Thus A. But the further reason is that Mg and O bonding, there is almost no distortion of the ionic bond.
For Question 11: The nickel ion is green in color. And since it has a positive charge, it will go towards the negative electrode. The sulphate ion however, is colorless, and thus, even if it goes to the negative electrode, you cannot see it. Thus the answer is C.
--- End quote ---
ok thanxx
but why MgO is not ionic covalent as there is distortion ????
Darth Austrakast:
yeah.......due to polarization
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