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however, phenolphtalein is colourless in acid and red in alkali methyl orange is red in acid and yellow in alkali and u should also know color about litmus ppr red in acid & blue in alkali

and no problem :) good luck to u too

haven't u done any past papers? :O

here it is

that represents nothing!

got it? or should i upload a pic?

extend both the straight lines such that line1 and line2 intersect with each other

join the rest with a second straight line

i'm also having chem p4 today :) gud luck man! my centre 2day is the beaconhouse school in DHA :)

whenever it says using two straight intersecting lines join all points that lie in a straight line by one straight line and then join the rest points in a striaght line with a straight line there would be 1 point that will be left out........leave it out

yyeah adeel is right man! :)

past papers krta hn

:D

I've heard that do maximum number of past papers.....

Yeah exactly! :cautious: ab bs yahi kr sakte hain ke P4 acha kr lein :)

yeah exactly! A;-27 is the answer.

Aluminium has only 1 naturally occuring isotope. write the neutrons & protons of this isotope. o_O

this is what the wiki says! didnt you read what the question said!? :P

yeah you're right :)

no! other than 14 neutrons all are wrong man :(