CHEM AND BIO HELP AND TIPS HERE

[CatAly$t]

somebody help me with this...

to answer first question u need the pic(attached)...

i dont understand this....

[**RoRo**]

somebody help me with this...

to answer first question u need the pic(attached)...

i dont understand this....

For your first question, I think the answer would be C where osmosis happens at X and transpiration happens at Y.
The arrow at X points at a cell, and the question tells you that the plant is losing water, so water loss from the cell takes place only by osmosis. And C is the only option with Osmosis taking place at X.

I'm not really sure about your second question, I prefer leaving it to someone who knows it better.

By the way, which year are these questions from? 

[Ivo]

somebody help me with this...

to answer first question u need the pic(attached)...

i dont understand this....

For your first question, I think the answer is B.  Because at X, water evaporates and becomes water vapour.  Then at Y, the water vapour diffuses out into the atmosphere.

I suppose for your second question the answer is B because it has to be either B or D, because the animal is immersed in the indicator, so the carbon dioxide produced from respiration doesn't have to tavel a great distance to reach the paper.  It has to be B because in D, the indicator paper is larger so obviously it would take longer to change colour.

Did I get it right?

[Raywin]

For your first question, I think the answer is B.  Because at X, water evaporates and becomes water vapour.  Then at Y, the water vapour diffuses out into the atmosphere.

I suppose for your second question the answer is B because it has to be either B or D, because the animal is immersed in the indicator, so the carbon dioxide produced from respiration doesn't have to tavel a great distance to reach the paper.  It has to be B because in D, the indicator paper is larger so obviously it would take longer to change colour.

Did I get it right?

Yeah both the answers are B. you are right..

[Raywin]

Hey guys, doubt..  cant figure out the parts (iii) and (iv). The Q is attached. Thanks a lot in advance...

[CatAly$t]

For your first question, I think the answer is B.  Because at X, water evaporates and becomes water vapour.  Then at Y, the water vapour diffuses out into the atmosphere.

I suppose for your second question the answer is B because it has to be either B or D, because the animal is immersed in the indicator, so the carbon dioxide produced from respiration doesn't have to tavel a great distance to reach the paper.  It has to be B because in D, the indicator paper is larger so obviously it would take longer to change colour.

Did I get it right?

yup...right again   

[Vin]

Hey guys, doubt..  cant figure out the parts (iii) and (iv). The Q is attached. Thanks a lot in advance...

Okay, I'll start with i)
a)
i)D   :2,8,18,8 - stable

ii)E   :2,8,18,8,1 - Group-I metal, one of the property:low density

iii) Covalent means two non-metals..so select only non-metals from the table..(except A) B- 2,8,4 and F 2,8,18,18,7

try to bond A with both of them (by drawing the atomic structure)
It is not possible with B, so it has to be F

OR if you want to be sure of your answer draw the bonding between A and F, gives you AF₃

iv)its B, always giant covalent structure of diamond has 4 electrons in the valence shell(outermost shell). Hence B
Revise Structure of diamond

v) A

[Vin]

Does this mean that ONLY water moves by osmosis? Even water VAPOR has to move by diffusion? Because I picked osmosis for that one, but yeah I guess, even water vapor must move by diffusion right? ONLY water and NOTHING else moves by osmosis?

yes, water moves only by osmosis through a semi-permeable membrane. Water vapor moves by diffusion and not osmosis

[NidZ- Hero]

Okay, I'll start with i)
a)
i)D   :2,8,18,8 - stable

ii)E   :2,8,18,8,1 - Group-I metal, one of the property:low density

iii) Covalent means two non-metals..so select only non-metals from the table..(except A) B- 2,8,4 and F 2,8,18,18,7

try to bond A with both of them (by drawing the atomic structure)
It is not possible with B, so it has to be F

OR if you want to be sure of your answer draw the bonding between A and F, gives you AF₃

iv)its B, always giant covalent structure of diamond has 4 electrons in the valence shell(outermost shell). Hence B
Revise Structure of diamond

v) A

hey why nt C i mean it seem more stable den D

[elemis]

@Nidzzz  D has A FULL OUTER ELECTRON SHELL .

That means it is a GROUP 8 ELEMENT i.e. it is inert hence it is UNREACTIVE and VERY stable !!

C has only 2 electrons in its outer electron shell. That means it is in Group 2 and is an alkali earth metal like Magnesium. SO it is VERY REACTIVE !!!!

[Vin]

hey why nt C i mean it seem more stable den D

Any element having completed their octet state (eight electrons in the outermost shell) is stable.
C has 2 electrons in the valence shell, so it tends to loose them fast, also it is very reactive

oh sorry Ari I'd already typed this

[NidZ- Hero]

Any element having completed their octet state (eight electrons in the outermost shell) is stable.
C has 2 electrons in the valence shell, so it tends to loose them fast, also it is very reactive

oh sorry Ari I'd already typed this

oh sorry Ari I'd already typed this !!!!! 
yyyaya i m dumb thanz i didny notice

[Vin]

oh sorry Ari I'd already typed this !!!!! 
yyyaya i m dumb thanz i didny notice

I never intended to offend ya!
You are not dumb!!

[elemis]

oh sorry Ari I'd already typed this !!!!! 
yyyaya i m dumb thanz i didny notice

Nidzzz you asked us for help. We helped you, dont get your ego involved in this matter.

Frankly, its not my problem if you couldnt understand my concept. However, Vin and I took the time out to help you.

The least you could have done is thanked us.

[NidZ- Hero]

Nidzzz you asked us for help. We helped you, dont get your ego involved in this matter.

Frankly, its not my problem if you couldnt understand my concept. However, Vin and I took the time out to help you.

The least you could have done is thanked us.

ari i did suppose  vin might be Knowin  dat i was jokin in it n i did mention at de last i didnt c it MY mistake
THANKZ 4 ur help