Here are my answers in order ( plz tell me if i made any
mistakes, which are, unintentional)
1) A
2) D
3) C
4) C
5) D
6) D
7) B
8) not too sure but i wrote A ( might be C)
9) D
10) B (sound is the ONLY longitidinal wave)
11) D
12) A
13) D ( big waste of paper on this one)
14) D
15) B ( total voltage of cell = 0.6X10=6V , 6V/30ohms = 0.2)
16) B
17) B
18) C ( i wrote A during my exams due to error while calculating
T.T)
19) D ( C is neutral point , B is going downwards, remember tht
the poles are SOUTH)
20) A
21) D ( not too sure, many of my friends wrote C)
22) D ( came out word for word in TYS)
23) D ( hentam)
24) D ( again, came out word for word)
25) B
26) A
27) A ( D is combustion- exothermic , B and C is bond breaking
which is endo)
28) D
29) C ( could be B )
30) A ( CO2 is acidic therefore pH < 7)
31) C ( only viable answer)
32) D ( both in group 5)
33) A ( i dun know why poeple wrote potassium )
34) A
35)D
36) C
37) D
38) B
39) D (duh)
40) B
the stuff inside the brackets just symbolize what i thought
while doing the paper
People chose potassium (for question 33) because the reactivity
series as we were taught begins with potassium as the most
reactive, hence leading them to think it's the most reactive out of
those 4. They probably didn't check the periodic table and
remembered that reactivity increases downwards in Group I. You made
mistakes yourself, you shouldn't be acting like a smartass
here.
EDIT: Oh and in case you were wondering, I chose caesium as my
answer.