Question 11 Mark
Write the IUPAC name of isobutyl alcohol.
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Question 21 Mark
Why $C _2 H _5 OH$ is soluble in water but $C _2 H _5 OC _2 H _5$ is not?
Answer
View full question & answer→Due to presence of polarity in $O - H$ bond, $C _2 H _5 OH$ forms a hydrogen bond with water which is responsible for the solubility of $C _2 H _5 OH$ whereas in $C _2 H _5 OC _2 H _5$ hydrogen bonding is not possible.
Question 31 Mark
What is the chemical equation for the conversion of phenol to salicylic acid?
Question 41 Mark
How will you distinguish between alcoholic - OH group and phenolic - OH group?
Answer
View full question & answer→Phenolic -OH group gives blue or violet colour with neutral $FeCl _3$, while the alcoholic - OH group does not.
Question 51 Mark
Arrange the following in the increasing order of their bond angles- $CH _3 OH , CH _3 OCH _3$ and $C _6 H _5 OH$.
Answer
View full question & answer→$CH _3 OH < C _6 H _5 OH < CH _3- O - CH _3$.
Question 61 Mark
What is the order of reactivity of halogen acids with ethers?
Answer
View full question & answer→$HI > HBr > HCl$.
Question 71 Mark
What is the combustion reaction of ethoxy ethane?
Answer
View full question & answer→$C _2 H _5O$ $C _2 H _5+6 O _2 \longrightarrow 4 CO _2+5 H _2 O$
Question 81 Mark
What is the general formula of open chain saturated ethers?
Answer
View full question & answer→$C _n H _{2 n+2} O$.
Question 91 Mark
What is the increasing order of boiling points of ethanol (I), propane (II) and methoxy methane (III).
Answer
View full question & answer→ (II) $<$ (III) $<$ (I)
Question 101 Mark
Complete the following reaction :
Question 111 Mark
Write down the order of solubility in water of the following compounds-pentan-l-ol (I), 2-methyl butan-$2- $ol (II) and pentan-2-ol (III).
Answer
View full question & answer→ (II) $>$ (III) $>$ (I)
Question 121 Mark
Write the equation for making anisole and phenetole from phenol.
Question 131 Mark
What is the function of diastase enzyme?
Answer
View full question & answer→The enzyme diastase catalyzes the conversion of starch to maltose.
Question 141 Mark
What is the major alkene obtained from the dehydration of Butan-l-ol?
Answer
View full question & answer→$CH _3- CH = CH - CH _3$, (But-2-ene).
Question 151 Mark
What is Lucas reagent and its uses?
Answer
View full question & answer→A solution of anhydrous zinc chloride in conc. hydrochloric acid is Lucas reagent. It is used to differentiate primary, secondary and tertiary alcohols.
Question 161 Mark
Write chemical equation of acetyl chloride with phenol.
Question 171 Mark
Which alcohol gives blue colour by victor Meyer's test?
Answer
View full question & answer→Secondary alcohol.
Question 181 Mark
What is the reaction of nitrous acid on ethylamine?
Question 191 Mark
An organic compound react with sodium metal and also gives iodoform test and formula of a compound.
Answer
View full question & answer→ $CH _3- CH _2- OH$ (ethyl alcohol).
Question 201 Mark
What is saponification?
Answer
View full question & answer→The hydrolysis of an ester to form an alcohol and the salt of a carboxylic acid in acidic or essential conditionis called saponification.
Question 211 Mark
Give one example of metamerism in ether.
Question 221 Mark
What kind of isomerism exists in Butan-l-ol and 2-methyl propan-l-ol.
Answer
View full question & answer→Chain isomerism.
Question 231 Mark
Name one functional group isomer of $m$-cresol.
View full question & answer→Question 241 Mark
How many alcoholic structural isomers are possible of molecular formula $C _5 H _{12} O$ ?
Answer
View full question & answer→Eight.
Question 251 Mark
Which hybridisation occurs on oxygen in ether?
Answer
View full question & answer→$s p^3$ hybridisation occurs on oxygen.
Question 261 Mark
Name the product formed when benzene is oxidized at $300^{\circ} C$ in presence of $V _2 O _5$.
View full question & answer→Question 271 Mark
What type of alcohol is sorbitol?
Answer
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Question 281 Mark
Alcohols are comparatively more soluble in water than hydrocarbons of comparable molecular masses. Explain this fact.
Answer
View full question & answer→Alcohol is a polar solvent. It form hydrogen bond with water molecules while hydrocarbons of comparable molecular masses does not form hydrogen bond due to being non-polar. Hence alcohol is more soluble in water.
Question 291 Mark
Explain why propanol has higher boiling point than that of the hydrocarbon, butane?
Answer
View full question & answer→The - OH group in propanol form intermolecular hydrogen bonding, thus it requires a lot of energy to break this hydrogen bond, as a result the boiling point increases. In butane the weak Van der Waals force of attraction present which requires less energy.
Question 301 Mark
Show how would you synthesise the alcohols from appropriate alkene :
Question 311 Mark
Show how would you synthesise the alcohols from appropriate alkene :
Question 321 Mark
Show how would you synthesise the alcohols from appropriate alkene :
Question 331 Mark
Show how would you synthesise the alcohols from appropriate alkene :
Question 341 Mark
Write equation of the reaction :
Friedel Crafts acetylation of anisole.
Friedel Crafts acetylation of anisole.
Question 351 Mark
Write equation of the reaction :
Bromination of anisole in ethanoic acid medium.
Bromination of anisole in ethanoic acid medium.
Question 361 Mark
Write equation of the reaction :
Nitration of anisole.
Nitration of anisole.
Answer
View full question & answer→Nitration of anisole with a mixture of concentrated $H _2 SO _4$ and conc. $HNO _3$, a mixture of ortho and para nitroanisole is formed.
Question 371 Mark
Write equation of the reaction :
Friedel Crafts reaction - alkylation of anisole.
Friedel Crafts reaction - alkylation of anisole.
Question 381 Mark
Write structure of the compound whose IUPAC name are as follow :
4-Chloro-3-ethylbutan-1-ol.
4-Chloro-3-ethylbutan-1-ol.
Question 391 Mark
Write structure of the compound whose IUPAC name are as follow :
3-Cycolhexylpentan-3-ol
3-Cycolhexylpentan-3-ol
Question 401 Mark
Write structure of the compound whose IUPAC name are as follow :
Cyclohexylmethanol
Cyclohexylmethanol
Question 411 Mark
Write structure of the compound whose IUPAC name are as follow :
2-Ethoxy-3-methylpentane
2-Ethoxy-3-methylpentane
Question 421 Mark
Write structure of the compound whose IUPAC name are as follow :
1-Ethoxypropane
1-Ethoxypropane
Question 431 Mark
Write structure of the compound whose IUPAC name are as follow :
Cyclopent-3-en-1-ol
Cyclopent-3-en-1-ol
Question 441 Mark
Write structure of the compound whose IUPAC name are as follow :
2,3-Diethylphenol
2,3-Diethylphenol
Question 451 Mark
Write structure of the compound whose IUPAC name are as follow :
3,5-Dimethylhexane-1,3, 5-triol
3,5-Dimethylhexane-1,3, 5-triol
Question 461 Mark
Write structure of the compound whose IUPAC name are as follow :
1-Phenylpropan-2-ol
1-Phenylpropan-2-ol
Question 471 Mark
Write structure of the compound whose IUPAC name are as follow :
2-Methylbutan-2-ol
2-Methylbutan-2-ol
Question 481 Mark
Write the equation of the reaction of hydrogen iodide with :
benzyl ethyl ether
benzyl ethyl ether
Question 491 Mark
Write the equation of the reaction of hydrogen iodide with :
methoxybenzene
methoxybenzene
Answer
In this $- O - CH _3$ bond is weaker than $- O - C _2 H _5$ bond, hence phenol is formed, not $CH _3- OH$.
View full question & answer→In this $- O - CH _3$ bond is weaker than $- O - C _2 H _5$ bond, hence phenol is formed, not $CH _3- OH$.
Question 501 Mark
Write the names of reagents and equations for the preparation of the ethers by Williamson's synthesis :
1-Methoxyethane
1-Methoxyethane