Chemistry MCQ thread...

[Hateexams93]

1 and 2 are correct , but why B ?? he didn't say the combinations

 

[Zishi]

peaks ,what do they indicate ??i thought they r showing the number of isotopes*

They indicate the relative abundances of the isotopes.

 

[hassam]

ITS A now discuss....
all exothermic reactions in nature occur sponataneously

 

[Hateexams93]

peaks ,what do they indicate ??i thought they r showing the number of isotopes*

They indicate the relative abundances of the isotopes.

hhh sorry , i meant the number * of peaks

 

[xHazeMx]

how do they occur spontaneously ?

 

[Zishi]

ITS A now discuss....
all exothermic reactions in nature occur sponataneously

Yeah, you're right. Like I said, I was completely wrong.

 

[hassam]

for e.g...u put fresh sodium in air....and see what happens..CAUTION..donot try this at LAB....lolx....
SPONTANEOUSLY means no heat needed and it forms a stable product

 

[Zishi]

peaks ,what do they indicate ??i thought they r showing the number of isotopes*

They indicate the relative abundances of the isotopes.

hhh sorry , i meant the number * of peaks

Yes, they show the number of isotopes.

 

[Zishi]

for e.g...u put fresh sodium in air....and see what happens..CAUTION..donot try this at LAB....lolx....
SPONTANEOUSLY means no heat needed and it forms a stable product

Ask more "tough" questions.

 

[xHazeMx]

in that case A is correct .. post more questions

 

[hassam]

 

[xHazeMx]

D

 

[hassam]

tell ur expl...and let zishi aner b4 i reveal the anser

 

[xHazeMx]

its D final answer

 

[MHHaider707]

Its D!!

 

[hassam]

its nt D......its A,...

 

[MHHaider707]

Explanation???

 

[Zishi]

My answer is A. What does the mark scheme say?

 

[xHazeMx]

K2Cr2O7 would give a result with W and X how is that?

 

[hassam]

YEA zishi ....its A.....TELL EXPLANATON ZISHI