Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que-  2-propanol and 1-propanol show the isomerism 

a. metamerism 

b. functional group isomerism 

c. geometric isomerism 

d. position isomerism 


Answer- position isomerism


Que-  Which of the following is an amide 

a. R-NH2 

b. RCONH2 

c. R - NH - R 

d. C6H5NH2 


Answer- RCONH2


Que-  In sp3 hybridization the expected geometry of molecules will be 

a. square planar 

b. trigonal pyramidal 

c. tetrahedral 

d. linear 


Answer- tetrahedral


Que-  Only sigma bonds are present in 

a. propene 

b. butanoic acid 

c. butanal 

d. ethoxy ethane 


Answer- ethoxy ethane


Que-  In cyano group the carbon atom shows which kind of hybridization 

a. sp2 

b. sp 

c. sp3 

d. none of the above 


Answer- sp


Que-  The structure of ethyne is 

a. angular 

b. trigonal 

c. linear 

d. trigonal planar 


Answer- linear


Que-  the fractional distillation of petroleum produces gasoline up to 

a. 10% 

b. 15% 

c. 20% 

d. 30% 


Answer- 20%


Que-  The general formula of cycloalkene is 

a. CnH2n 

b. CnH2n+2 

c. CnH2n-1 

d. CnH2n-2 


Answer- CnH2n-2


Que-  Which is not heterocyclic compound 

a. Furan 

b. Thiophene 

c. Aniline 

d. Pyridine 


Answer- Aniline


Que-  C5H12 has the number of isomers 

a. one 

b. two 

c. three 

d. four 


Answer- three


Que-  Alkanes containing a methyl group on main chain at 2nd carbon are called 

a. iso-alkane 

b. normal-alkane 

c. neo-alkane 

d. branched-alkane 


Answer- iso-alkane


Que-  When one hydrogen atom of alkane is removed then it is called 

a. alkene 

b. alkyl 

c. aldehyde 

d. saturated hydrocarbon 


Answer- alkyl


Que-  Alkanes are also known as 

a. saturated hydrocarbon 

b. unsaturated hydrocarbon 

c. paraffins 

d. both a & c 


Answer- paraffins


Que-  Sabatier Senderns reaction involve _________ in presence of Ni 

a. Aalkene & H2 

b. alkene & O2 

c. alkene & N2 

d. alkyne & Cl2 


Answer- Aalkene & H2


Que-  Hydrogenolysis results in the formation of 

a. alkane 

b. alkene 

c. alkyne 

d. aldehydes 


Answer- alkane


Que-  Clemmensens reduction infolves the reduction of 

a. ketone 

b. aldehyde 

c. alkane 

d. all of the above 


Answer- ketone


Que-  Removal of CO2 is called 

a. carboxylation 

b. decarboxylation 

c. esterification 

d. hydroxylation 


Answer- decarboxylation


Que-  Soda lime is a mixture of 

a. CaO and KOH 

b. CaO and NaOH 

c. NaOH and Na2O 

d. Na2O and KOH 


Answer- CaO and NaOH


Que-  Molozonide is unstable and changes into ozonide on 

a. reduction 

b. oxidation 

c. hydrolysis 

d. rearrangement 


Answer- rearrangement


Que-  Dehalogenation of ethyl tetrahalide will give 

a. ethene 

b. ethyne 

c. ethyl halide 

d. all of the above are possible 


Answer- ethyne


Que-  R-Mg-Br is called 

a. Grignard reagent 

b. Metallic alkyl halide 

c. Both a & b 

d. Alkyl 


Answer- Both a & b


Que-  Upto ______ C atoms alkanes are gases 

a. 2 

b. 3 

c. 4 

d. 6 


Answer- 4


Que-  Which of the following is the most reactive 

a. ethane 

b. ethyne 

c. ethene 

d. benzene 


Answer- ethene


Que-  Incomplete oxidation of methane in the limited supply of air forms. 

a. CO2 and H2O 

b. CH3OH 

c. CO + H2 + C 

d. CO + H2O + C 


Answer- CH3OH


Que-  Introduction of nitro group in a molecule is called 

a. nitration 

b. halogenation 

c. sulphonation 

d. amination 


Answer- nitration


Que-  Order of ease of halogenation in alkane is 

a. I2>Cl2>Br2>F2 

b. F2>Cl2>I2>Br2 

c. F2>Cl2>Br2>I2 

d. Cl2>F2>Br2>I2 


Answer- F2>Cl2>Br2>I2


Que-  The gas used in manufacturing of urea fertilizer 

a. C2H6 

b. C2H4 

c. C2H2 

d. CH4 


Answer- CH4


Que-  General formula of alkyne is 

a. CnH2n + 2 

b. CnH2n - 2 

c. CnH2n 

d. CnH2n + 2 


Answer- CnH2n - 2


Que-  Which of the following will be acidic 

a. propyne 

b. 1-butyne 

c. ethyne 

d. all of the above 


Answer- all of the above


Que-  Removal of halogen and hydrogen atom is 

a. halogenation 

b. dehalogenation 

c. dehydrohalogenation 

d. hydrohalogenation 


Answer- dehydrohalogenation


Que-  Alkenes are produced from dehalogenation of 

a. dihalo alkane 

b. trihalo alkane 

c. vicinal dihalo alkane 

d. vicinal trihalo alkane 


Answer- vicinal dihalo alkane


Que-  Reactivity due to pi-electrons is present in 

a. alkane 

b. alkene 

c. alkyne 

d. both b & c 


Answer- both b & c


Que-  Raney nickel is prepared from __________ by treating with caustic soda 

a. Ni-Cu alloy 

b. Ni-Fe alloy 

c. Ni-Al alloy 

d. Ni-Mg alloy 


Answer- Ni-Al alloy


Que-  Which one is Chloroform 

a. CH2Cl2 

b. CH3Cl 

c. CHCl3 

d. CCl4 


Answer- CHCl3


Que-  Vinylacetylene combines with HCI to form 

a. polyacetylene 

b. benzene 

c. chloroprene 

d. divinyl acetylene 


Answer- chloroprene


Que-  Which is used for artificial ripening of fruit? 

a. ethane 

b. ethene 

c. ethyne 

d. methane 


Answer- ethene


Que-  Preparation of vegetable ghee involves 

a. halogenation 

b. hydroxylation 

c. hydrogenation 

d. hydration 


Answer- hydrogenation


Que-  Which is methyl cyanide 

a. CH3NH2 

b. CH3NO2 

c. CH3CN 

d. CH2 = CH - CN 


Answer- CH3CN


Que-  The molecular formula of toluene is 

a. C7H7 

b. C7H8 

c. C8H8 

d. C8H7 


Answer- C7H8


Que-  Phenanthrene is a fused polycyclic compound contains ______ benzene rings 

a. Two 

b. Three 

c. Four 

d. Five 


Answer- Three


Que-  Aniline is a derivative of benzene which contains 

a. Imino group 

b. Amino group 

c. Amide group 

d. Nitro group 


Answer- Amino group


Que-  Nitration of chlorobenzene gives 

a. o - chloronitrobenzene 

b. p - chloronitrobenzene 

c. m - chloronitrobenzene 

d. a & b 


Answer- a & b


Que-  When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound? 

a. Bromine 

b. Chlorine 

c. Fluorine 

d. Iodine 


Answer- Iodine


Que-  Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in 

a. The presence of Oxygen 

b. The presence of Hydrogen 

c. The absence of Oxygen 

d. The presence of excessive Oxygen 


Answer- The absence of Oxygen


Que-  By which method the molecular mass of benzene was determined as 78.108? 

a. Specific gravity method 

b. Vapour density method 

c. X-ray diffraction method 

d. Distillation methos 


Answer- Vapour density method


Que-  How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum? 

a. Two 

b. Three 

c. Four 

d. Six 


Answer- Three


Que-  Chlorination of toluene in the presence of sublight produces 

a. Benzyl chloride 

b. o - chlorotoluene 

c. p - chlorotoluene 

d. benzoic acid 


Answer- Benzyl chloride


Que-  The resonance energy of benzene is 

a. 150.5 kJ/mol 

b. 250.5 kJ/mol 

c. 150.5 Cal/mol 

d. 250.5 Cal/mol 


Answer- 150.5 kJ/mol


Que-  Which one of the following methods will not give benzene? 

a. Heating sod. Salt of Benzoic acid with soda lime 

b. Distilling phenol with Zn dust 

c. Chlorobenzene with NaOH at 360Degree Centigrade & 150atm. 

d. Hydrolysis of benzene sulphonic acid with super heated steam. 


Answer- Chlorobenzene with NaOH at 360Degree Centigrade & 150atm.


Que-  Which is fused cyclic aromatic compound 

a. diphenyl amine 

b. diphenyl methane 

c. naphthalene 

d. biphenyl 


Answer- naphthalene


Que-  Acetophenone is a 

a. Ether 

b. Ketone 

c. Aldehyde 

d. Ester 


Answer- Ketone


Que-  Reacting bromine with benzene in the presence of sunlight will result in 

a. The rupturing of benzene ring 

b. Substitution reaction 

c. Addition reaction 

d. No-reaction 


Answer- Addition reaction


Que-  Benzene does not undergo 

a. Substitution reaction 

b. Addition reaction 

c. Polymerization reactions 

d. Oxidation reactions 


Answer- Polymerization reactions


Que-  During sulphonation of benzene H2SO4 generates the electrophile 

a. HSO4- 

b. SO2 

c. SO3 

d. H+ 


Answer- SO3


Que-  Nitronium ion is 

a. NO3 

b. NO 

c. NO2- 

d. NO2+ 


Answer- NO2+


Que-  Which compound will readily undergo sulphonation? 

a. Benzene 

b. Nitro benzene 

c. Toluene 

d. Chlorobenzene 


Answer- Toluene


Que-  Benzene is heated in air with V2O5 at 450Degree Centigrade it undergoes 

a. Substitution reaction 

b. Addition reaction 

c. Elimination reaction 

d. Oxidation reaction 


Answer- Oxidation reaction


Que-  The preparation of benzene from acetylene can also be said as 

a. Oxidation 

b. Polymerization 

c. Dehydration 

d. Condensation 


Answer- Polymerization


Que-  Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as 

a. Dows process 

b. Friedel & Craft acylation 

c. Friedel & Craft alkylation 

d. Clemmenson reduction 


Answer- Friedel & Craft alkylation


Que-  Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 

a. Toluene 

b. Ethyl benzene 

c. n-propyl benzene 

d. All 


Answer- All


Que-  Ozonolysis of benzene produces 

a. Glycol 

b. Glyoxal 

c. Vicinal diol 

d. Both b & c 


Answer- Glyoxal


Que-  What is the molecular formula of Benzenetriozonide? 

a. C6H6O9 

b. C6H5O8 

c. C6H5O9 

d. C6H6O6 


Answer- C6H6O9


Que-  The hydrolysis of Benzenetrizonide will yield three moles of 

a. Glyoxime 

b. Benzaldehyde 

c. Glycol 

d. Glyoxal 


Answer- Glyoxal


Que-  Ethyl chloride with nascent hydrogen produces 

a. methane 

b. ethane 

c. propane 

d. butane 


Answer- ethane


Que-  Which one is not a nucleophile? 

a. C2H5O- 

b. SCN- 

c. NH3 

d. H3C+ 


Answer- H3C+


Que-  The number of molecules taking part in the rate determining step is called 

a. Order of reaction 

b. Rate of reaction 

c. Mole of a reaction 

d. Extent of a reaction 


Answer- Order of reaction


Que-  What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B]? 

a. Zero 

b. One 

c. Two 

d. Three 


Answer- Two


Que-  What is the order of kinetics in the SN1 mechanism? 

a. Zero 

b. First 

c. Second 

d. Third 


Answer- First


Que-  Which alkyl halide out of the following may follow both SN1 and SN2 mechanism? 

a. CH3-X 

b. (CH3)3 C-CH2 - X 

c. (CH3)2 CH - X 

d. (CH3)3 C - X 


Answer- (CH3)2 CH - X


Que-  When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed? 

a. 2 moles of ethane 

b. 1 mole of ethane 

c. 2 moles of butane 

d. 1 mole of butane 


Answer- 1 mole of butane


Que-  The ether used in Wurtz synthesis is 

a. acidic 

b. basic 

c. aqueous 

d. dry 


Answer- dry


Que-  When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is 

a. propane 

b. propanoic acid 

c. propanal 

d. propanol 


Answer- propanoic acid


Que-  Grignard reagent is reactive due to 

a. the presence of halogen atom 

b. the presence of magnesium atom 

c. the polarity of C-Mg bond 

d. all 


Answer- the polarity of C-Mg bond


Que-  SN2 reaction can be best carried out with 

a. primary alkyl halide 

b. secondary alkyl halide 

c. tertiary alkyl halide 

d. all 


Answer- primary alkyl halide


Que-  Elimination bimolecular reactions involve 

a. first order kinetics 

b. second order kinetics 

c. third order kinetics 

d. zero order kinetics 


Answer- second order kinetics


Que-  For which mechanisms the first step involved is the same? 

a. E1 + E2 

b. E2 + SN2 

c. E1 and SN1 

d. SN1 and SN2 


Answer- E1 and SN1


Que-  The rate of E1 reaction depends upon 

a. the concentration of substrate 

b. the concentration of nucleophile 

c. the concentration of substrate as well as nucleophile 

d. base the concentration of substrate as well as nucleophile 


Answer- the concentration of substrate


Que-  Alkyl halides are considered to be very reactive compounds towards nucleophile because 

a. they have an electrophilic carbon 

b. they have an electrophilic carbon & a good leaving group 

c. they have an electrophilic carbon & a bad leaving group 

d. they have a nucleophilic carbon & a good leaving group 


Answer- they have an electrophilic carbon & a good leaving group


Que-  Which one of the following species is not an electrophile? 

a. NH3 

b. Br+ 

c. H+ 

d. BF3 


Answer- NH3


Que-  Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent 

a. formaldehyde 

b. ketone 

c. ethylene epoxide 

d. both a & c 


Answer- both a & c


Que-  Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone? 

a. primary alcohol 

b. secondary alcohol 

c. tertiary alcohol 

d. dihydric alcohol 


Answer- tertiary alcohol


Que-  Which one of the following molecules does not form alcohol when reacts with Grignard reagent? 

a. formaldehyde 

b. acetaldehyde 

c. propanone 

d. carbondioxide 


Answer- carbondioxide


Que-  In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms 

a. two 

b. three 

c. one 

d. four 


Answer- one


Que-  Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield 

a. primary alcohol 

b. secondary alcohol 

c. tertiary alcohol 

d. dihydric alcohol 


Answer- primary alcohol


Que-  The best method of preparation of alkyl halides is a reaction of alcohol with 

a. Zn / HCI 

b. SOCl2 / Pyridine 

c. PCI3 

d. PCI5 


Answer- SOCl2 / Pyridine


Que-  Alkyl halides undergo a type of reaction 

a. Nucleophilic substitution 

b. Nucleophilic addition 

c. Elimination 

d. both a & c 


Answer- both a & c


Que-  50% inversion of configuration of molecules take place in a 

a. E1 - reaction 

b. E2 - reaction 

c. SN1 - reaction 

d. SN2 - reaction 


Answer- SN1 - reaction


Que-  Which one of the following is termed as benzul alcohol? 

a. C6H5OH 

b. C6H5CH(OH)2 

c. C6H5CH2OH 

d. C6H5COOH 


Answer- C6H5CH2OH


Que-  Which one of the following is also known as lactic acid? 

a. 3-Hydroxy propanoic acid 

b. 2-Hydroxy propanoic acid 

c. 2-hydroxy butanoic acid 

d. 3-hydroxy butanoic acid 


Answer- 2-Hydroxy propanoic acid


Que-  Which one of the following is also known as tartaric acid? 

a. 2 3-dihydroxy butance 1 4 -dioic acid 

b. 2 3 -dihydroxy butanedioic acid 

c. 2 3 -dihydroxy butanioc acid 

d. 2 2 -dihydroxy butanoic acid 


Answer- 2 3-dihydroxy butance 1 4 -dioic acid


Que-  Water gas heated at 450Degree Centigrade and 200 atm pressure in the presence of ZnO+Cr2O3 will produce 

a. methanal 

b. methanol 

c. carbonic acid 

d. methane 


Answer- methanol


Que-  The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called 

a. Mother liquor 

b. Filterate 

c. Extract 

d. Molasses 


Answer- Molasses


Que-  The formula of starch is 

a. C12H22O11 

b. C6H10O5 

c. (C6H10O5)n 

d. C6H12O6 


Answer- (C6H10O5)n


Que-  The process of fermentation of starch involve many enzymes the sequence of enzymes used are 

a. Diastase-maltase-zymase 

b. Zymase-maltase-diastase 

c. Maltase-diastase-zymase 

d. Diastase-zymase-maltase 


Answer- Diastase-maltase-zymase


Que-  The rectified spirit contains 

a. 12% alcohol 

b. 90% alcohol 

c. 95% alcohol 

d. 100% alcohol 


Answer- 95% alcohol


Que-  K2Cr2O7/H2SO4 generate 

a. Oxygen 

b. Hydrogen 

c. Nascent oxygen[O] 

d. Nascent hydrogen[H] 


Answer- Nascent oxygen[O]


Que-  The oxidation of isopropyl alcohol will yield 

a. propane 

b. Propanol 

c. Propanone 

d. Propanoic acid 


Answer- Propanone


Que-  Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate? 

a. Primary alcohol 

b. Secondary alcohol 

c. Tertiary alcohol 

d. All of above 


Answer- Tertiary alcohol


Que-  The distinction test for primary secondary and tertiary alcohol required to react each of them is 

a. Cone. HCI and anhydrous SOCl2 

b. Cone. HCI and anhydrous CaCl2 

c. Cone. HCI and anhydrous PCl2 

d. Cone. HCI and anhydrous ZnCl2 


Answer- Cone. HCI and anhydrous ZnCl2


Que-  Which compound is also known by the name of carbolic acid? 

a. C2H2OH 

b. H2CO3 

c. C6H5OH 

d. H3PO3 


Answer- C6H5OH

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