CBSE Questions for Class 11 Medical Chemistry Hydrocarbons Quiz 15 - MCQExams.com

The compound that is most reactive towards electrophilic substitution is:
  • Toluene
  • Benzene
  • Nitrobenzene
  • Benzoic acid
Methane and ethane both can be obtained in single step from 
  • $$CH_3I$$
  • $$C_2H_5I$$
  • $$CH_3OH$$
  • $$C_2H_5OH$$
Ortho-dihydroxy benzene is 
  • Carvacrol
  • Resorcinol
  • Catechol
  • Orcinol
Reaction $$C_2H_5I + C_5H_{11}I + 2Na \rightarrow C_2H_5 - C_5H_{11} + 2NaI$$ is called
  • Hoffmann's reaction
  • Dow's reaction
  • Wurtz's reaction
  • Riemer - Tiemann's reaction
Acetylene can be prepared from
  • Potassium fumarate
  • Calcium carbide
  • Ethylene bromide
  • All of these
The $$IUPAC$$ name of $$\begin{matrix} \ \ \ \quad \quad CH_{ 3 }CH_{ 2 }CHCH_{ 2 }CH_{ 2 }CH_{ 3 } \\ | \\ { CH }_{ 3 } \end{matrix}$$ is
  • $$4-$$methylhexane
  • $$3-$$methylhexane
  • $$2-$$propylbutane
  • $$2-$$ethylpentane
1,2,3-trihydroxybenzene is also known as:
  • Pyrogallol
  • Phloroglucinol
  • Resorcinol
  • Quinol
$$R-CH_{2}-CCl_{2}-R\xrightarrow[]{Reagent}R-C\equiv C-R$$

The reagent is
  • $$Na$$
  • $$HCl$$ and $$H_{2}O$$
  • $$KOH$$ in $$C_{2}H_{5}OH$$
  • $$Zn$$
Which gives $$CH_4$$ when treated with water?
  • Silicon carbide
  • Calcium carbide
  • Aluminium carbide
  • Iron carbide
Which of the following does not give alkane? 
  • Reaction of $$CH_3I$$ with Na in ether
  • Reaction of sodium acetate with sodalime
  • Electrolysis of concentrated sodium acetate solution
  • Reaction of ethyl chloride with alco. $$KOH$$
Compound (E) is:
1768591_1d27c5bee08249da84401c807466e871.png
Simplest alkyne is represented by:
  • $$CH$$
  • $$CH_{2}$$
  • $$C_{2}H_{2}$$
  • $$C_{2}H_{4}$$
Propane cannot be prepared from which reaction?
  • $$CH_3 - CH = CH_2 \xrightarrow[OH^-]{B_2H_6}$$
  • $$CH_3CH_2CH_2I \xrightarrow[P]{HI}$$
  • $$CH_3CH_2CH_2I \xrightarrow[]{Zn,\ dil . HCl+H_2}$$
  • None of these
B.P. of branched chain alkanes as compared to straight chain alkanes are
  • lower
  • equal
  • higher
  • independent of the chain
Necessary conditions for halogenation are
  • Cold and dark
  • Presence of halogen carrier
  • Both (a) and (b)
  • None
$$ A\xleftarrow [ \Delta  ]{ CU } CH_{ 3 }CH_{ 2 }OH\xrightarrow [ \Delta  ]{ AL_{ 2 }O_{ 3 } } B. $$ A and B respectively are
  • Alkene, alkanal
  • Alkyne, alkanal
  • Alkanal, alkene
  • Alkene, alkyne
Point out the wrong statement in relation to the structure of benzene
  • It forms only one monosubstitution product
  • The $$C-C$$ bond distance in benzene is uniformly $$1.397\mathring{A}$$
  • It is a resonance hybrid of a number of canonical forms
  • It has three delocalised $$\pi -$$ molecular orbitals
Which of the following reactions would give a good yield of hydrocarbon product?
  • $$RCOOK\xrightarrow [ oxidation ]{ electrolytic } $$
  • $$RCOOAg\xrightarrow [ ]{ {I}_{2} } $$
  • $${CH}_{3}{CH}_{3}\xrightarrow [ ]{ {Cl}_{2}/hv } $$
  • $${Me}_{3}C-Cl\xrightarrow [ ]{ {C}_{2}{H}_{5}OH } $$
i. Compound (B) $$ (C_6H_{14}) \xrightarrow{Cl_2 + h\nu} $$ (Two isomeric
                                                              hexyl chloride)
                                                                 $$ (C_6H_{13}Cl) $$ 
                                                                        $$ \downarrow{Zn + aq. \, CH_3COOH} $$
                                                                        (B) 

ii. Alkene (C) and alkene (D) $$ (C_6H_{12}) \xrightarrow{H_2 + Pt} $$ Compound (B)  
 
The alkenes (C) and (D) are : 
$$ CH_4 $$ can be prepared by the reaction of $$ H_2O $$ with :
  • $$ Mg_2C_3 $$
  • $$ CaC_2 $$
  • $$ Be_2C $$
  • $$ Al_4C_3 $$
Fifteen millilitres of gaseous hydrocarbon (A) was required for complete combustion of $$ 357 \, ml $$  of air ($$ 21 $$  % oxygen by volume) and gaseous products occupied $$ 327\, ml $$ (all volumes being measured at STP).
The value of N is : 
1767950_9e9bb807636e4fbbbbdc62f86bd410f0.png
  • 2
  • 3
  • 4
  • 5
Olefins can be hydrogenated by
  • Zinc and $$HCl$$
  • Nascent hydrogen
  • Raney $$Ni$$ and $$H_{2}$$
  • Lithium hydride in ether
Compound (A) $$ (C_6H_{14}) \xrightarrow{Cl_2 + h\nu} $$ (Five isomeric 
                                                            hexyl chloride ) 
                                                            $$ (C_6H_{13} Cl) $$ 
                                                                     $$ \downarrow{Zn + aq. \, CH_3COOH} $$
                                                                      (A) 

Compound (A) is :  
  • $$ 2,2$$-Dimethyl butane
  • $$2$$-Methyl pentane
  • $$2,2$$-Dimethyl propane
  • $$3$$-Methyl pentane
$$C_5H_{10}$$ is the formula of:
  • Pentane
  • Pentene
  • Pentyne
  • Pentadiene
Of the following compounds, whose ozonolysis proves the Kekule structure of benzene?
  • Benzene
  • Toluene
  • o-Xylene
  • p-Xylene
Complete the following reaction:
(i) $$C_2H_5 I+H_2\xrightarrow [C_2H_5OH]{Zn -Cu}X$$
(ii) $$CH_3COONa +H_2O \xrightarrow []{Electrolysis} Y$$
(iii) $$CH_2CH_2CH_2CH_2CH_2CH_3 \xrightarrow [773\ K]{Cr_2O_3 /Al_2 O_3}Z$$
  • $$X=C_2 H_6, Y=C_2 H_6, Z=C_6H_6$$
  • $$X=CH_4, Y=CH_3 COOH, Z=CH_3CH_3$$
  • $$X=C_2 H_5, Y=CH_4 , Z=C_4H_{10}$$
  • $$X=C_2 H_6, Y=CH_4 , Z=C_5H_{10}$$
Which of the following compound is chiral? 
  • $$ 3-$$methyl$$-3-$$hexene
  • $$4-$$chloro-1-methylcyclohexane
  • $$ 2- $$ phenylpentane
  • $$ 1,3-$$ diisopropylbenzene
Which of the following compounds is not aromatic?
Which of the following does not give a white precipitate with $$AgNO_3$$ solution?
  • Propyne
  • $$1-$$ Butyne
  • $$2-$$ Butyne
  • $$1-$$ Pentyne.
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