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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