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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 
  • CH3I
  • C2H5I
  • CH3OH
  • C2H5OH
Ortho-dihydroxy benzene is 
  • Carvacrol
  • Resorcinol
  • Catechol
  • Orcinol
Reaction C2H5I+C5H11I+2NaC2H5C5H11+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    CH3CH2CHCH2CH2CH3|CH3 is
  • 4methylhexane
  • 3methylhexane
  • 2propylbutane
  • 2ethylpentane
1,2,3-trihydroxybenzene is also known as:
  • Pyrogallol
  • Phloroglucinol
  • Resorcinol
  • Quinol
RCH2CCl2RReagentRCCR

The reagent is
  • Na
  • HCl and H2O
  • KOH in C2H5OH
  • Zn
Which gives CH4 when treated with water?
  • Silicon carbide
  • Calcium carbide
  • Aluminium carbide
  • Iron carbide
Which of the following does not give alkane? 
  • Reaction of CH3I 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
  • CH2
  • C2H2
  • C2H4
Propane cannot be prepared from which reaction?
  • CH3CH=CH2B2H6OH
  • CH3CH2CH2IHIP
  • CH3CH2CH2IZn, dil.HCl+H2
  • 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
ACUΔCH3CH2OHAL2O3ΔB. 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 CC bond distance in benzene is uniformly 1.397˚A
  • It is a resonance hybrid of a number of canonical forms
  • It has three delocalised π molecular orbitals
Which of the following reactions would give a good yield of hydrocarbon product?
  • RCOOKelectrolyticoxidation
  • RCOOAgI2
  • CH3CH3Cl2/hv
  • Me3CClC2H5OH
i. Compound (B) (C6H14)Cl2+hν (Two isomeric
                                                              hexyl chloride)
                                                                 (C6H13Cl) 
                                                                        Zn+aq.CH3COOH
                                                                        (B) 

ii. Alkene (C) and alkene (D) (C6H12)H2+Pt Compound (B)  
 
The alkenes (C) and (D) are : 
CH4 can be prepared by the reaction of H2O with :
  • Mg2C3
  • CaC2
  • Be2C
  • Al4C3
Fifteen millilitres of gaseous hydrocarbon (A) was required for complete combustion of 357ml  of air (21  % oxygen by volume) and gaseous products occupied 327ml (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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