need serious help with chem!! :/

[iKhaled]

i need to know all the reactions involving sulphuric acids with hydrocarbons and the reactions of hydrocarbons with sodium hydroxide

they always ask these kind of questions in paper 1 and i just cant understand them

 

[aom]

Sulphric acid reactions
1. Alcohols + conc. sulfric acid = ethene (dehydration)
2. Alcohol + acid = ester (Conditions conc. sulfric acid and temp 100) Esterification
3. -CN + Sulfric acid = Acid
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Sodium hydroxide reactions
1. Alkane + alcoholic sodium hydroxide = Alkene
2. halogenoalkanes (CH3-CH2Cl) + Sodium hydroxide aqueous = (CH3-CH2OH) nucleophilic substution
3. Esters hydrolysis > eg:- CH3CH2COOCH2CH3 + sodium hydroxide = (CH3CH2COO-Na+) + (CH3CH2OH)
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GOOD LUCK

 

[Leo Ahmed]

HOW Q 7 is answerd?
http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w10_qp_12.pdf

 

[aom]

NO IDEA ....... Man there are some questions where u have to make a guess .... u can't know everything

 

[asexamskillme111]

Guessing will get you no where. This is how you solve it:
The ratio of the volumes is 5:10, so what you do is, (5/15 *12) + (10/15*6) = 8. The answer is A.