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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