Chemistry: Post your doubts here!

[doremon]

the answer is 1 ~

woops it's 3-methylbutan-1-ol

 

[Snowysangel]

Is carboxylic acid completely soluble in water?

 

[Browny]

check it again.

 

[Browny]

Is carboxylic acid completely soluble in water?

Yes

 

[Snowysangel]

Also isn't alcl3 tetrahedral and not trigonal planar??

 

[randomcod]

I have learned it in another way and its a whole new concept but if you wanna know it i will explain my way it works everytime

yes please!

 

[Zepudee]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_w06_qp_1.pdf

Q3 (C), 4 (D), 21 (C), 25 (B)

 

[Browny]

Also isn't alcl3 tetrahedral and not trigonal planar??

It is trigonal planar as it Al has only 3 outer electrons as it is in group 3 and those three are covalently bonded to Cl so it has only 3 bond pairs and is trigonal planar.

 

[Snowysangel]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_12.pdf 33 answ is D

 

[Browny]

Can someone please look into these difficult questions?

 

[huh]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s13_qp_11.pdf

Help in q30 please. Cant differentiate between B and D.

 

[Browny]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_12.pdf 33 answ is D

2 is wrong as it is not high as it is formed from a reversible reaction and 3 is wrong as HSO4- is formed from a one way reaction but as the other is formed from a reversible one.

 

[Snowysangel]

2 is wrong as it is not high as it is formed from a reversible reaction and 3 is wrong as HSO4- is formed from a one way reaction but as the other is formed from a reversible one.

So HSO4 will be greater than SO4...but won't that shift the equilibrium to the right?

 

[Browny]

Snowysangel can you check out my questions

 

[doremon]

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this is the new syllabus. At the time that question was made, 994 was used. Be my guest and try answering that question with 944.

 

[Snowysangel]

Can someone please look into these difficult questions?

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In question. 11, one mole of the compound gives 3 moles of carbon so it's C since o.072/24 is .03 so the number if moles of the compound should be 1/3rd of the number of moles of carbon that it would produced-.01-so C is correct

 

[Metanoia]

How does solid iodine contain more then one type of bonding? Why is there only one kind in silicon dioxide?

Two kinds of bonding, covalent bonds between I and I atoms, intermolecular bonds among I2 molecules.

 

[Snowysangel]

Can someone please look into these difficult questions?

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Is 23 B cause then it can follow a 1:2:1 ratio and ethens can form 50% of the products

 

[GCE As and a level]

Guys i need ur help in this
Q2 and 13 are done

Metanoia , ZaqZainab , @ Every One , Could u Plz help me with this
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s05_qp_1.pdf

Q2..Answer B
Q13.Answer B>>>Why it is not Mg ??Mg is just beside Al , so i thought that it will have a similar Electronegativity as Mg.
Q15.Answer C>>>When H2SO4 acts as an acid and when it acts as an oxidizing agent?
Q31.Answer A>>>I know that this is simple, but i am always confused with this type,So is there any hint??
Q32.Answer D
Q33.Answer B
Q40.Answer B

THNX in advance

 

[Snowysangel]

Can someone please look into these difficult questions?

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Is 32 B. it behaves no ideally because volume is directly proportioned al to temperature for an ideal gas and it partially turns into a liquid because its volume decreases which means that the morgues are closing together and ate experiencing relatively stronger intermolecular forces