Ozonolysis ( O 3 , H 2 O 2 ) of, CH 3 - CH | CH 3 - C ≡ C - CH 3 gives :

CH 3 CH | CH 3 COOH + CH 3 COOH

In a reaction, CH 2 = CH 2 → acid Hypochlorous M → R CH 2 OH | CH 2 OH M = molecules, R = reagent. M and R are

CH 2 Cl . CH 2 OH and aq. NaHCO 3

Chemistry - Hydrocarbons - Quiz-2

Nitration of benzene is:

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nucleophilic substitution
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electrophilic substitution
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electrophilic addition
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nucleophilic addition

Which of the following compounds has the lowest boiling point?

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${CH}_{3} {CH}_{2} {CH}_{2} {CH}_{2} {CH}_{3}$
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${CH}_{3} CH = CH - {CH}_{2} {CH}_{3}$
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${CH}_{3} CH = CH - CH = {CH}_{2}$
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${CH}_{3} {CH}_{2} {CH}_{2} {CH}_{3}$

1-butyne on reaction with hot alkaline ${KMnO}_{4}$ gives:

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${CH}_{3} {CH}_{2} {CH}_{2} COOH$
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${CH}_{3} {CH}_{2} COOH$ + ${CO}_{2}$
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${CH}_{3} {CH}_{2} COOH$
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${CH}_{3} {CH}_{2} COOH$ + HCOOH

${CH}_{3} - C \equiv C - {CH}_{3} \overset{{NaNH}_{2}}{\to}$ X; what is X?

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${CH}_{3} - {CH}_{2} {CH}_{2} {CH}_{3}$
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${CH}_{3} {CH}_{2} C \equiv CH$
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${CH}_{2} = C = CH - {CH}_{3}$

Acetylene on reacting with hypochlorous acid gives:

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${CH}_{2} Cl . CHO$
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${ClCH}_{2} CHO$
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${Cl}_{2} CH . CHO$
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${ClCH}_{2} COOH$

Benzene reacts with ${CH}_{3} Cl$ in the presence of anhy. ${AlCl}_{3}$ to form

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chlorobenzene
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benzylchloride
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toluene
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xylene

$CH \equiv CH \overset{O_{3} / NaOH}{\to}$ X $\overset{Zn / {CH}_{3} COOH}{\to}$ Y. Y is:

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${CH}_{2} OH - {CH}_{2} OH$
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${CH}_{3} {CH}_{2} OH$
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${CH}_{3} COOH$
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${CH}_{3} OH$

What is the end product of the following sequences of operations?

${CaC}_{2} \overset{H_{2} O}{\to}$ A $\to_{{Hg}^{2 +}}^{Dil . H_{2} {SO}_{4}}$ B $\to_{H_{2}}^{Ni}$ C

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Methyl alcohol
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Acetaldehyde
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$C_{2} H_{5} OH$
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$C_{2} H_{4}$

Alkynes can be reduced to alkenes by hydrogenation in presence of:

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raney Ni
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anhy. ${AlCl}_{3}$
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Pd
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Lindlar's catalyst

$R - CH = {CH}_{2} \to_{C_{2} H_{5} OH}^{Na / {NH}_{3} (l)}$ ${RCH}_{2} {CH}_{3}$ is called:

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Clemmensen reduction
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Fisher-Spier reduction
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Birch reduction
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Arndt-Eistert reduction

The cylindrical shape of an alkyne is due to

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three sigma $C - C$ bonds
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three $π$ $C - C$ bonds
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two sigma $C - C$ and one $π$ $C - C$ bonds
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one sigma $C - C$ and two $π$ $C - C$ bonds

Octane no. of a fuel can be increased by:

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isomerism
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alkylation
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reforming
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all of these

The shortest $C - C$ bond distance is found in

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diamond
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ethane
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benzene
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acetylene

Benzene reacts with n-propyl chloride in the presence of anhydrous ${AlCl}_{3}$ to give

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3-propyl-1-chlorobenzene
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n-propyl benzene
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no reaction
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iso-propyl benzene

The distance between two adjacent cabron atoms is largest in

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benzene
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ethene
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butane
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ethyne

In benzene, $C - C$ bond length is 1.39 $\overset{°}{A}$ ; the $C - H$ bond length is:

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1.39
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1.08
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1.54
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1.46

Which reaction produces acrylonitrile ( ${CH}_{2} = CHCN$ )?

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Ethyne $\to_{{Ba}^{2 +}}^{HCN}$
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Acrylic acid $\overset{KCN}{\to}$
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Ethyne $\overset{KCN}{\to}$
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Ethyne $\overset{HOCl}{\to}$

is not converted to by:

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Wolff-Kishner reaction
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Clemmensen reduction
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Red P + HI at $200 ° C$
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Wurtz's reaction

Products of the following reaction

${CH}_{3} C \equiv C . {CH}_{2} {CH}_{3} \to_{(ii) Hydrolysis}^{(i) O_{3}}$ ... are

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${CH}_{3} CHO$ + ${CH}_{3} {CH}_{2} CHO$
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${CH}_{3} COOH$ + ${CH}_{3} {COCH}_{3}$
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${CH}_{3} COOH$ + $HOOC . {CH}_{2} {CH}_{3}$
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${CH}_{3} COOH$ + ${CO}_{2}$

Acetylene reacts with 42% $H_{2} {SO}_{4}$ containing 1% ${HgSO}_{4}$ to give:

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$C_{2} H_{5} {HSO}_{4}$
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${CH}_{3} CHO$
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HCHO
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${CH}_{2} = {CH}_{2}$

When ${CaC}_{2}$ was hydrolysed a gas was obtained. It had a garlic odour due to phosgene present as impurity. The gas was passed through ammoniacal solution of ${Cu}_{2} {Cl}_{2}$ , a red ppt. was obtained. The gas was:

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ethylene
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propyne
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acetylene
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ethane

Which of the following compounds with molecular formula, $C_{5} H_{10}$ yields acetone on ozonolysis?

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2-methyl-2-butene
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3-methyl-1-butene
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Cyclopentane
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2-methyl-1-butene

Ozonolysis ( $O_{3}$ , $H_{2} O_{2}$ ) of, ${CH}_{3} - \underset{{CH}_{3}}{\underset{|}{CH}} - C \equiv C - {CH}_{3}$ gives :

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${CH}_{3} \underset{{CH}_{3}}{\underset{|}{CH}} COOH$ + ${CH}_{3} COOH$
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${CH}_{3} \underset{{CH}_{3}}{\underset{|}{CH}} CHO$ + ${CH}_{3} CHO$
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${CH}_{3} \underset{{CH}_{3}}{\underset{|}{CH}} CHO$ + ${CH}_{3} COOH$
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none of the above

In a reaction,

${CH}_{2} = {CH}_{2}$ $\to_{acid}^{Hypochlorous}$ M $\overset{R}{\to}$ $\underset{{CH}_{2} OH}{\underset{|}{{CH}_{2} OH}}$

M = molecules, R = reagent. M and R are

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${CH}_{3} {CH}_{2} Cl$ and NaOH
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${CH}_{2} Cl . {CH}_{2} OH$ and aq. ${NaHCO}_{3}$
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${CH}_{3} {CH}_{2} OH$ and HCl
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and heat

When 3,3-dimethyl-2-butanol is heated with conc. $H_{2} {SO}_{4}$ , the major product obtained is -

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2,3-Dimethyl-2-butene
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3,3-Dimethyl-2-butene
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2,3-Dimethyl-1-butene
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is and trans-isomers of 2,3-Dimethyl-2-butene

During ozonolysis of ${CH}_{2} = {CH}_{2}$ if hydrolysis is made in absence of Zn dust the products formed are:

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HCHO
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HCOOH
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${CH}_{3} OH$
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${CH}_{2} {OHCH}_{2} OH$

${CH}_{3} C \equiv C . {CH}_{3}$ $\to_{(ii) H_{2} O / Zn}^{(i) X}$ $C H_{3} - C - C - C H_{3} | | | | O O$

In the above reaction X is:

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${HNO}_{3}$
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$O_{2}$
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$O_{3}$
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${KMnO}_{4}$

The major product of the following reaction is:

+ Alc.KOH $\to$ ?

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Butene
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But-2-ene
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Butane
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But-1-yne

An alkene, obtained by the dehydration of an alcohol (A), on ozonolysis gives two molecules of acetaldehyde for every molecule of alkene. The alcohol (A) is:

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${CH}_{3} {CH}_{2} {CH}_{2} OH$
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${CH}_{3} {CH}_{2} OH$
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${CH}_{3} CH = {CHCH}_{2} OH$
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Gammexane (a $γ$ -isomer) is:

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BHC
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benzene hexachloride
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2
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3. lindane
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4. all of these
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4

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Practice Chemistry Quiz Questions and Answers

0:0:1

Practice Chemistry Quiz Questions and Answers

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