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5's A since barium is insoluble in water and can b collectd thru filtration. (ithink)View attachment 41946 View attachment 41947
plz clear concepts of redox and reducing agent oxidising agent i always get stuck in redox reactions
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short explanation plzzz
let me take a proper look lolcan u xplain 7 in detail? i always get stuck in determning these
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whats the Mr of air?
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what the purpose of the steel wool + give explanation for all q's
... if you look at it it has propanol and methanoic acid... Prop=3 and meth=1 so it gives u four carbon atoms
4 is B since hydrogen has the least Mr compartivly to that of air. here u'l have to compare the Mr's with the Mr of air which is 30 or 32.View attachment 41942 View attachment 41943
whats the Mr of air?
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what the purpose of the steel wool + give explanation for all q's
be specific 30 or 32?
6 is C .because :View attachment 41942 View attachment 41943
whats the Mr of air?
View attachment 41944 View attachment 41945
what the purpose of the steel wool + give explanation for all q's
30be specific 30 or 32?
A6 is C .because :
in option A copper is not reactive enough to react with an acid.or u can say its below hydrogen so it wont displace hydrogen .
in option B copper is below Zinc ,as a result, no reaction
in option D, calcium carbonate is insoluble in water,hence,no reaction.
this leaves us with option "C" . check it is it correct or not ?
ur wrong
pakka?30
7 is D : potassium dichromate wla qk first three r al properties of an acid nd r thus correctView attachment 41946 View attachment 41947
plz clear concepts of redox and reducing agent oxidising agent i always get stuck in redox reactions
View attachment 41948 View attachment 41949
short explanation plzzz
how :O copper cannot react with an acid untl n unless the acid is concentratedA
yeppakka?
iron..rusting? it reacts with air as air has oxygen.how do u know iron will react with oxygen
7 is A (an addition reaction attachmnt#41947 ) qk addition reacton mei he single product mlta haiView attachment 41946 View attachment 41947
plz clear concepts of redox and reducing agent oxidising agent i always get stuck in redox reactions
View attachment 41948 View attachment 41949
short explanation plzzz
O/N 13 IS A TOUGH PAPERhttp://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_w13_qp_22.pdf
q1b..can any1 draw it for me ?
When they've given you the reactants/products you gotta write them.. over the straight line...
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