Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Phosphene gas will be produced if phosphorous acid is subjected to___________________? 

a. Oxidation  

b. Reduction  

c. Decomposition  

d. Both b & c 


Answer- Both b & c


Que- Which one of following is not a property of pure quartz ? 

a. Coloured solid  

b. Brittle  

c. Hard  

d. All of above 


Answer- Coloured solid


Que- Which of the following does not contain phosphorus ? 

a. Yolk of egg  

b. Bone  

c. Nerves  

d. Steel 


Answer- Steel


Que- Which one of the following is not the use of graphite ? 

a. Lead pencils  

b. Abrasive  

c. Lubricant  

d. Electrode of electrolytic cell 


Answer- Abrasive


Que- The composition of brown ring in nitrate test is_________________? 

a. FeSO4.No  

b. FeSO4.No2  

c. FeSO4.No3  

d. FeSO4.N2o 


Answer- FeSO4.No


Que- Which one of the following compounds usually smells like garlic ? 

a. P2O3  

b. P2O5  

c. H3PO3  

d. All have same smell 


Answer- P2O3


Que- The element of group VIA which is a non-metal is________________? 

a. S  

b. Se  

c. Te  

d. Po 


Answer- S


Que- Which of the elements show passivity when treated with conc. HNO3? 

a. Fe  

b. A  

c. Cr  

d. All of the above 


Answer- All of the above


Que- The gas which cannot be dried by conc. H2SO4 ? 

a. SO2  

b. H2S  

c. CO2  

d. C2H4 


Answer- H2S


Que- FeSO4 forms brown ring with________________? 

a. N2O3  

b. NO2  

c. NO  

d. N2O 


Answer- NO


Que- Oxygen does not react with all except_________________? 

a. Alkali  

b. Acid  

c. Water  

d. Metals 


Answer- Metals


Que- In which compound nitrogen has maximum oxidation state____________________? 

a. N2O  

b. NO2  

c. HNO2  

d. HNO3 


Answer- HNO3


Que- Among the halogens the rare element is________________? 

a. Fluorine  

b. Chlorine  

c. Astatine   

d. Iodine 


Answer- Astatine 


Que- Vander Waals forces are stronger in_______________? 

a. F2  

b. Cl2  

c. Br2  

d. I2 


Answer- I2


Que- The most powerful oxidizing agent among the halogens is__________________? 

a. F2   

b. Cl2  

c. Br2  

d. I2 


Answer- F2 


Que- The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________? 

a. F2  

b. Cl2  

c. Br2  

d. I2 


Answer- Cl2


Que- The halogen which reacts very slowly with halogen is________________? 

a. Fluorine  

b. Chlorine  

c. Bromine  

d. Iodine 


Answer- Iodine


Que- The halogen having highest electron affinity is_____________________? 

a. Fluorine  

b. Chlorine  

c. Bromine  

d. Iodine 


Answer- Chlorine


Que- Bromine can be liberated from KBr solution by the action of _______________? 

a. Iodine solution  

b. Chlorine  

c. NaCl  

d. Ki 


Answer- Chlorine


Que- Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ? 

a. Cl2O  

b. ClO2  

c. Cl2O6  

d. Cl2O7 


Answer- ClO2


Que- Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________? 

a. Displacement reaction  

b. Double displacement reaction  

c. Disproportionation reaction   

d. Reduction reaction 


Answer- Disproportionation reaction 


Que- Which of the halogen can displace other three elements ? 

a. Flourine   

b. Chlorine  

c. Iodine  

d. Bromine 


Answer- Flourine 


Que- The chemical formula of sodium hypochlorite is________________? 

a. NaCLO   

b. NaClO2  

c. NaClO3  

d. NaClO4 


Answer- NaCLO 


Que- Bleaching powder is not used for bleaching________________? 

a. Cotton  

b. Costly fabrics  

c. Linen  

d. Paper pulb 


Answer- Costly fabrics


Que- Which of the following is not use of compounds of Fluorine________________? 

a. SbF3 is used for manufacture of pottery  

b. Sodium fluoroacetate is a rat poison  

c. Cu F2 is used in ceramic industry  

d. None of the above 


Answer- None of the above


Que- Photographic plates are coated with a thin film of _________________? 

a. AgNO3  

b. AgI  

c. AgCl  

d. AgBr 


Answer- AgBr


Que- Indicate the correct statement__________________? 

a. Cl2 is the strongest oxidizing agent  

b. I2 is a volatile solid  

c. Br2 is more reactive than Cl2  

d. Cl2 is insoluble in water 


Answer- I2 is a volatile solid


Que- Which one of the following halogens is present in Teflon________________? 

a. I2  

b. Br2  

c. Cl2  

d. F2 


Answer- F2


Que- Which is the paramagnetic oxide of chlorine ? 

a. Cl2O7  

b. Cl2O6  

c. ClO2   

d. all 


Answer- ClO2 


Que- The colour of chlorine gas is_______________? 

a. pale yellow  

b. freenish yellow  

c. reddish brown  

d. grayish black 


Answer- freenish yellow


Que- Which of the following statements is incorrect about fluorine_______________? 

a. fluorine is restricted to -1 oxidation state  

b. fluorine follows octet rule and as well as extended octet rule  

c. fluorine has lowest dissociation energy among the halogens  

d. both B and C 


Answer- both B and C


Que- Which one of the following is the weakest acid in water__________________? 

a. HF   

b. HCI  

c. HBr  

d. HI 


Answer- HF 


Que- Which of the following represents the correct electronic configuration of VII A group elements in the ground state ? 

a. ns2p2  

b. ns2p4  

c. ns2p5   

d. ns2p6 


Answer- ns2p5 


Que- Which is the strongest acid ? 

a. HCIO  

b. HCIO2  

c. HCIO3  

d. HCIO4 


Answer- HCIO4


Que- Bleaching powder is an example of________________? 

a. Normal salt  

b. Double salt  

c. Mixed salt   

d. Complex 


Answer- Mixed salt 


Que- Which of the following oxides of iodine is used for quantitative analysis of CO ? 

a. I2O4  

b. I4O2  

c. I2O5   

d. All are equally useful 


Answer- I2O5 


Que- Which of the halogen has highest electronegativity ? 

a. Fluorine   

b. Chlorine  

c. Bromine  

d. Iodine 


Answer- Fluorine 


Que- Which of the following statements is incorrect about halogens ? 

a. All are non-metals  

b. All the halogens have electronic conviguration ns2p5  

c. They have high electron attinity and ionization energy  

d. All the halogens react with noble gases to form their halides 


Answer- All the halogens react with noble gases to form their halides


Que- Fluorine can react with_________________? 

a. Xe  

b. Kr  

c. Rn  

d. All of the above 


Answer- All of the above


Que- Which of the following is the weakest reducing agent ? 

a. HF   

b. HBr  

c. HC  

d. HI 


Answer- HF 


Que- In which compound of Xenon the oxidation state of Xenon is + 6? 

a. XeF4  

b. XeOF4  

c. XeOF2  

d. Na4XeO6 


Answer- XeOF4


Que- The anhydride of HCIO4 is_________________? 

a. Cl2O  

b. Cl2O6  

c. ClO2  

d. Cl2O7 


Answer- Cl2O7


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- Alkanes are also known as________________? 

a. saturated hydrocarbon  

b. unsaturated hydrocarbon  

c. paraffins  

d. both A & C 


Answer- paraffins


Que- Hydrogenolysis results in the formation of________________? 

a. alkane  

b. alkene  

c. alkyne  

d. aldehydes 


Answer- alkane


Que- Removal of CO2 is called_____________________? 

a. carboxylation  

b. decarboxylation  

c. esterification  

d. hydroxylation 


Answer- decarboxylation


Que- Molozonide is unstable and changes into ozonide on_________________? 

a. reduction  

b. oxidation  

c. hydrolysis  

d. rearrangement 


Answer- rearrangement


Que- R-Mg-Br is called___________________? 

a. Grignard reagent  

b. Metallic alkyl halide  

c. Both A & B  

d. Alkyl 


Answer- Both A & B


Que- Which of the following is the most reactive_________________? 

a. ethane  

b. ethyne  

c. ethene  

d. benzene 


Answer- ethene


Que- Introduction of nitro group in a molecule is called___________________? 

a. nitration  

b. halogenation  

c. sulphonation  

d. amination 


Answer- nitration


Que- The gas used in manufacturing of urea fertilizer__________________? 

a. C2H6  

b. C2H4  

c. C2H2  

d. CH4 


Answer- CH4


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- 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- In unsaturated hydrocarbons electrons favour___________________? 

a. less reactivity  

b. addition reactions  

c. substitution reactions  

d. none 


Answer- addition reactions


Que- Which one is Chloroform_________________? 

a. CH2Cl2  

b. CH3Cl  

c. CHCl3  

d. CCl4 


Answer- CHCl3


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- When one hydrogen atom of alkane is removed then it is called________________? 

a. alkene  

b. alkyl  

c. aldehyde  

d. saturated hydrocarbon 


Answer- alkyl


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- Clemmensens reduction infolves the reduction of___________________? 

a. ketone  

b. aldehyde  

c. alkane  

d. all of the above 


Answer- ketone


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- Dehalogenation of ethyl tetrahalide will give____________________? 

a. ethene  

b. ethyne  

c. ethyl halide  

d. all of the above are possible 


Answer- ethyne


Que- Upto ___________________ C atoms alkanes are gases? 

a. 2  

b. 3  

c. 4  

d. 6 


Answer- 4


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- 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- General formula of alkyne is______________? 

a. CnH2n + 2  

b. CnH2n – 2  

c. CnH2n  

d. CnH2n + 2 


Answer- CnH2n – 2


Que- Removal of halogen and hydrogen atom is_________________? 

a. halogenation  

b. dehalogenation  

c. dehydrohalogenation  

d. hydrohalogenation 


Answer- dehydrohalogenation


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- Vinylacetylene combines with HCI to form___________________? 

a. polyacetylene  

b. benzene  

c. chloroprene  

d. divinyl acetylene 


Answer- chloroprene


Que- Which C-X bond has the highest bond energy per mole ? 

a. C-F  

b. C-C  

c. C-Br  

d. C-I 


Answer- C-F


Que- Ethyl chloride with nascent hydrogen produces_________________? 

a. methane  

b. ethane  

c. propane  

d. butane 


Answer- ethane


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- 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- 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- 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- The ether used in Wurtz synthesis is__________________? 

a. acidic  

b. basic  

c. aqueous  

d. dry 


Answer- dry


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 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- 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- 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 alkyl halide has the highest reactivity for a particular alkyl group ? 

a. R-F  

b. R-C  

c. R-Br  

d. R-I 


Answer- R-I


Que- Which one is not a nucleophile ? 

a. C2H5O-  

b. SCN-  

c. NH3  

d. H3C+ 


Answer- H3C+


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- 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- 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- 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- 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 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- 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- Alkyl halides undergo a type of reaction_________________? 

a. Nucleophilic substitution  

b. Nucleophilic addition  

c. Elimination  

d. both A & C 


Answer- both A & C


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 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- 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

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