Biology; Chemistry; Physics: Post your doubts here!

[areeba fatima]

see the question and tell what would be ans if it asked for thin plate

i think A

 

[asd]

29!
at least you know what you have to do!

What's with the Exclamation mark (!) after every sentence? :/

 

[asd]

i think A

Well, I think B

 

[A star]

anser for this is B. people i a asking for thin plate.

 

[ashiqbal]

part two second type of polymers condensation (lose of molcule usually water) thre types amide linkage (nylon and protien) ester linkage (fats lipids and terylene) and ether linkage (poly(ether and carbohydrates) monomers include di amine aicaboxylic acid diol

i sont think ether linkage is in our syllabus!

 

[areeba fatima]

anser for this is B. people i a asking for thin plate.

it would be B if it is asked for thickest plate
read the question carefully

 

[daredevil]

Tell me some easy way to memorize the reactivity of metals. i know my reactivity series but not which metals react with cold water, which with hot water, then with acids and so on. i can't remember if a metal will react with a specific substance or not

 

[ashiqbal]

What's with the Exclamation mark (!) after every sentence? :/

yaar kia karun aadat ban gayi hai. Acha ab nahin lagaon ga, OK?

 

[syed1995]

ashiqbal
A star

Q. State Some Macromolecules And Give An Use for each polymer. (1o Marks)

 

[A star]

it would be B if it is asked for thickest plate
read the question carefully

areeba i know. i want to know for thin plate. if u donot want to answer please ignore it . thankyu

 

[A star]

ashiqbal
A star

Q. State Some Macromolecules And Give An Use for each polymer. (1o Marks)

terylene cloths
nylon threads
poly ethene plastic bags
perspex wind shield in cars
polystyrene styrofoam

 

[A star]

ashiqbal
A star

Q. State Some Macromolecules And Give An Use for each polymer. (1o Marks)

teflon nonstick surface . i think six r enough

 

[ashiqbal]

Tell me some easy way to memorize the reactivity of metals. i know my reactivity series but not which metals react with cold water, which with hot water, then with acids and so on. i can't remember if a metal will react with a specific substance or not

Above magnesium, react with cold water to form Metal hydroxide
below magnesium till copper, react with steam (only some of the beginning ones) and dilute HCl to form metal Oxide

remember:
metal + (cold)water = MetalOH + H2
metal + steam = MetalO + H2

 

[asd]

Tell me some easy way to memorize the reactivity of metals. i know my reactivity series but not which metals react with cold water, which with hot water, then with acids and so on. i can't remember if a metal will react with a specific substance or not

Metals below H, can not react with Acid. Since they cannot displace the H ion in the acid. Metals above H will react with acids. Metal FAR above H (Like Zn, Al, Fe) can even react with dilute acid/Hot water. And metals FURTHER above like Na, Rb, K (Most group 1 metals) Mg, Ca, will react with cold water.

 

[syed1995]

Tell me some easy way to memorize the reactivity of metals. i know my reactivity series but not which metals react with cold water, which with hot water, then with acids and so on. i can't remember if a metal will react with a specific substance or not

^-- React with Cold water --^
Please
Send
Cats
Monkeys
^-- React with Hot water And Dilute Acids --^
And
Zebras
In
Locked
^-- Don't react With Dilute Acids --^
Hired
Cages
Soon

 

[areeba fatima]

areeba i know. i want to know for thin plate. if u donot want to answer please ignore it . thankyu

Really sorry! i didn't know you'll get serious.......btw i wanted to help u....that's why i am saying that the answer would be A for thin plate and B if asked for THickest plate
Sorry again

 

[asd]

yaar kia karun aadat ban gayi hai. Acha ab nahin lagaon ga, OK?

Good Boi

 

[A star]

Really sorry! i didn't know you'll get serious.......btw i wanted to help u....that's why i am saying that the answer would be A for thin plate and B if asked for THickest plate
Sorry again

no problem . sorry for being harsh i thought u wr fooling

 

[daredevil]

Tell me some easy way to memorize the reactivity of metals. i know my reactivity series but not which metals react with cold water, which with hot water, then with acids and so on. i can't remember if a metal will react with a specific substance or not

 

[A star]

^-- React with Cold water --^
Please
Send
Cats
Monkeys
^-- React with Hot water And Dilute Acids --^
And
Zebras
In
Locked
^-- Don't react With Dilute Acids --^
Hired
Cages
Soon

u know what would happen if u react potassium with cold water. u will be burnd