Chemistry MCQ (Paper 1) Discussion

[Pals_1010]

So how was it?

Very easy

 

[axhynic]

extremely easy :mrgreen:

 

[jazzangel16]

Wasn't bad

 

[basch]

made lot of stupid mistakes

 

[usama1993]

So easy.........
Hope i would get 100 % in MCQs

 

[Nishii4]

it was average, lots of questions appeared in past papers!!

 

[mimmi]

i bet many made a mistake in the first question!

hint: CO2 sublimes ;P

 

[alay]

isnt it supposed to be CO2?sublime is kinda like condensing..anyways..so wat was the answer for the graph for the rate of reaction of HCL and calcium carbonate?

 

[Nishii4]

isnt it supposed to be CO2?sublime is kinda like condensing..anyways..so wat was the answer for the graph for the rate of reaction of HCL and calcium carbonate?

third, right?

 

[alay]

i chose the 1 which decreases with a decreasing gradient..is there such a thing as a negative activation energy?

 

[Nishii4]

from wat i have learned..no. now i dnt knw if it exists

 

[jazzangel16]

First answer is co2?

 

[Pals_1010]

@ alay

The answer is the one with decreasing gradient. The answer B i think



Looks a bit like this.

 

[Pals_1010]

@ mimmi

very observant

i think the reverse of sublimation is also known as condensation. Not sure about that.

If am wrong then dang it, one mark lost.

 

[jazzangel16]

Whats the answer to the first Question!!!!!!!!!!!!1

 

[alay]

why is aluminium used to make airplanes?is it pure AL or an alloy?

 

[Prince III]

first of all dont say it was easy paper
it was very tricky believe you me
once we would discuss the paper we would get to know how stupid mistakes we did

 

[Prince III]

@ alay

The answer is the one with decreasing gradient. The answer B i think



Looks a bit like this.

yes pals your answer is correct i also ticked that option

 

[Prince III]

why is aluminium used to make airplanes?is it pure AL or an alloy?

it's NOT pure it's in alloy form
i clearly remember my sir said that magnesium is added to aluminium while making aircrafts body to hardened the material because aluminium itself it too light

 

[Prince III]

for the first question the answer is Carbondioxide