Biology; Chemistry; Physics: Post your doubts here!

[***amd***]

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what would be the second intersecting line to plot on graph other than rise in temperature? weird question

 

[kirann]

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woah thanks

 

[kirann]

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but where is the intersection point

 

[***amd***]

but where is the intersection point

the point where the graph bends.

 

[funky brat]

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can somebody plz eplain this question from part e onwards ...

e) if 25.9 --> 0.0025 moles
1000 (1dm^3)---> x
25.9x= 2.5
x= 0.0965 moles
Then the formula no. of moles= mass in g/mr
0.0965= 8.50/x
x=88 g
Now seee this CnH2n+1COOH
Total mass= 88g.
COOH= 45g
CnH2n+1= 88-45
= 43g
C3H2(3)+1= 43g.
Therefore the formula is= C3H7COOH.
Need help with the next part?

 

[funky brat]

Hows your preparation going?
Yar aap jaise log kaise itney genius hote ho.

Hosla.
Lol, can't stop laughing genius wali bat pey.

 

[funky brat]

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FIRST PART OF EXPERIMENT
Blow the air in the test tube with the help of a blowing-pump. This is the air you inhale.
When the water will be displaced down and air will come in contact with potassium, it will burn using the OXYGEN gas present in air. The water level will rise.
Measure this rise in water level, 'A'
SECOND PART OF EXPERIMENT
(Set up the same apparatus and) Blow the air in the test tube with your mouth. This is your exhaled air.
Potassium will burn again when it comes in contact with air, using the OXYGEN, and the water level will rise.
Measure this rise in water level, 'B'.

We will observe that A > B because inhaling air contains more oxygen.

HEY! WAIT! ISNT IT THAT POTASSIUM BURNS IN WATER TOO? IF IT IS, THEN I GUESS WE SHOULD USE OIL INSTEAD OF WATER

Na kabhi yeh experiment dekha hai na suna.
Well sahi ho ga.

 

[funky brat]

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but where is the intersection point

Actually both lines need to be extended to make the point of intersection clear which is important.

 

[asadalam]

This is the last day.Guys if you have any tips for BIO ATP please share
funky brat Awesome12 ***amd*** Dark Destination
robinhoodmustafa Can any of your A* holders and xpc users before this batch help?

 

[funky brat]

So whats the right explanation

See, if oxygen is absorbed from the air, the level of the air decreases to which the liquid responds but this is only possible if we have something to absorb CO2 otherwise the level would remain the same as the CO2 would compensate for the oxygen used up.

 

[funky brat]

This is the last day.Guys if you have any tips for BIO ATP please share
funky brat Awesome12 ***amd*** Dark Destination
robinhoodmustafa Can any of your A* holders and xpc users before this batch help?

Night probably.

 

[kirann]

Actually both lines need to be extended to make the point of intersection clear which is important.

which two lines? the horixontal n diagonal? how did you plotted the horizontal one?

 

[asadalam]

See, if oxygen is absorbed from the air, the level of the air decreases to which the liquid responds but this is only possible if we have something to absorb CO2 otherwise the level would remain the same as the CO2 would compensate for the oxygen used up.

I did say to have a substance to absorb CO2.Read my answer again:

''So there might be some error in your question.Going by your idea,i say that place some germinating seeds in a tube over a guaze with soda lime beneath it to absorb co2.Attach a tube with a bubble as the miniscus.As the seeds respire they use up the o2 present in the tube and bubble moves to the right side.We can repeat this experiment with a substance to absorb O2 and show that no change in bubble level is seen.thus seeds use 02 to respire. ''

 

[funky brat]

which two lines? the horixontal n diagonal? how did you plotted the horizontal one?

I've done this paper before. I haven't read the question but I remember when you'll plot the points you'll easily find these 2 lines from your plots then extend both in a direction that they meet each other.

 

[funky brat]

I did say to have a substance to absorb CO2.Read my answer again:

''So there might be some error in your question.Going by your idea,i say that place some germinating seeds in a tube over a guaze with soda lime beneath it to absorb co2.Attach a tube with a bubble as the miniscus.As the seeds respire they use up the o2 present in the tube and bubble moves to the right side.We can repeat this experiment with a substance to absorb O2 and show that no change in bubble level is seen.thus seeds use 02 to respire. ''

Hmm I missed it then, sorry.

 

[kirann]

no

e) if 25.9 --> 0.0025 moles
1000 (1dm^3)---> x
25.9x= 2.5
x= 0.0965 moles
Then the formula no. of moles= mass in g/mr
0.0965= 8.50/x
x=88 g
Now seee this CnH2n+1COOH
Total mass= 88g.
COOH= 45g
CnH2n+1= 88-45
= 43g
C3H2(3)+1= 43g.
Therefore the formula is= C3H7COOH.
Need help with the next part?

no, thats enough...thanks

 

[asadalam]

Hmm I missed it then, sorry.

So it is right then

 

[kirann]

I've done this paper before. I haven't read the question but I remember when you'll plot the points you'll easily find these 2 lines from your plots then extend both in a direction that they meet each other.

just clear which quantities you plotted? the rise in temp and...?

 

[Awesome12]

Did anyone read my ans?

 

[funky brat]

So it is right then

Yeah, you may clap for yourself.