Complicated with Chemistry

Let's talk bout my relationship with Chemistry today

Well basically it was the simple one from the others but the one with the most mistake.

So why why why???!!
Stupid me

I should write the correct one but instead i write the wrong one!!

Same goes to paper one

So many silly mistakes

Thanks to my dumbness

But paper 3 was quite hard

Cause of the experiment

It was an easy question but I didn't read bout that

LOL

The experiment is the effect of the catalyst on the rate of reaction.

How easy is that?

B.U.T

The catalyst is copper (II) oxide

What should I put inside there?

In the reference books, it only show the manganese as the catalyst

So end up I wrote the sodium thiosulphate

Wth?

It's completely wrong wrong wrong

The correct one should be zinc

What didn't I think of that?

I'm seriously bodoh