Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que-  Which is true about Zn-Cu galvanic cell? 

a. Reduction occurs at anode 

b. K+ ion transfer from salt bridge to left beaker of ZnSO4 

c. Oxidation occurs at cathode 

d. Anode is negatively charged 


Answer- Anode is negatively charged


Que-  Which is the unit of (K) rate constant for zero order reaction? 

a. s-1 

b. mol dm-3 s-1 

c. mol-1 dm3 s-1 

d. mol-2 dm6 s-1 


Answer- mol dm-3 s-1


Que-  Nitrates of which pair gives different products on thermal decomposition 

a. Na K 

b. Mg Ca 

c. Li Na 

d. Li Ca 


Answer- Li Na


Que-  Which is carnalite 

a. KCI 

b. NaCI 

c. KCI MgCl2 6H2O 

d. Na2CO3. 10H2O 


Answer- KCI MgCl2 6H2O


Que-  Keeping in view the size of atom which is in correct order 

a. Mg > Sr 

b. Ba > Mg 

c. Lu > Ce 

d. CI > 1 


Answer- Ba > Mg


Que-  Which one does not give borax bead test 

a. Copper sulphate 

b. Barium sulphate 

c. Cobalt sulphate 

d. Nickel sulphate 


Answer- Barium sulphate


Que-  Which one is not the use of silicones 

a. Lubricant 

b. Water repellent film 

c. Rubber sheet 

d. Medicine 


Answer- Medicine


Que-  The most reactive allotropic form of phosphorus is 

a. White 

b. Redox potential 

c. Black 

d. Violet 


Answer- White


Que-  Chemical composition of cinnabar is 

a. FeS2 

b. HgS 

c. PbS 

d. ZnS 


Answer- HgS


Que-  Which molecule has the highest bond energy among the halogens 

a. Fluorine 

b. Chlorine 

c. Iodine 

d. Bromine 


Answer- Chlorine


Que-  When chlorine is passed through hot solution of caustic soda the reaction is said as 

a. Displacement 

b. Reduction 

c. Disproportionation reaction 

d. Double displacement reaction 


Answer- Disproportionation reaction


Que-  The most paramagnetic element is 

a. Iron 

b. Cobalt 

c. Chromium 

d. Manganese 


Answer- Iron


Que-  In the complex [Cr(OH)3(H2O)3] the coordination number is 

a. 2 

b. 3 

c. 4 

d. 6 


Answer- 6


Que-  Which one of the following looks odd 

a. H2SO4 

b. KMnO4 

c. H2S 

d. K2CrO4 


Answer- H2S


Que-  A great variety of the organic compounds is due to its property of carbon 

a. Show tetravalency 

b. Exhibit catenation 

c. Show isomerism 

d. Can form multiple bonds 


Answer- Exhibit catenation


Que-  In 1 - pentene -4- yne the carbon exhibit hybridization 

a. sp3 - sp2 

b. sp2 - sp 

c. sp2 - sp 

d. sp3 - sp2 - sp 


Answer- sp3 - sp2 - sp


Que-  Vinyl acetylene combines with hydrochloric acid produces 

a. Diviny1 acetylene 

b. Ethylidine dichloride 

c. Chloroprene 

d. 1 - 3 - 3 - trichloro butane 


Answer- Chloroprene


Que-  When benzene is heated in air with V2O5 at 450Degree Centigrade yields 

a. Phenol 

b. Maleic anhydride 

c. Glyoxal 

d. Benzoic acid 


Answer- Maleic anhydride


Que-  When toluene reacts with chlorine in sunlight the first major product is 

a. Benzy1 chloride 

b. Benzal dichloride 

c. O-chlorotoluene 

d. O-chlorotoluene and P-chlorotoluene 


Answer- Benzy1 chloride


Que-  Which one of the following will be sulphonated readily? 

a. Chlorobenzene 

b. Toluene 

c. Nitrobenzene 

d. Benzene 


Answer- Toluene


Que-  Which one of the following is not a good leaving group ? 

a. HSO4- 

b. Cl- 

c. OH- 

d. Br- 


Answer- OH-


Que-  When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields 

a. Carboxylic acid 

b. Ethanoic acid 

c. Propanoic acid 

d. Butanoic acid 


Answer- Propanoic acid


Que-  The process of fermentation involves all the enzymes except 

a. Diastase 

b. Invertase 

c. Zymase 

d. Sucrase 


Answer- Sucrase


Que-  Ethy1 chloride on reduction in the presence of Zn/HCI produces 

a. n. butane 

b. Ethanol 

c. Ethane 

d. Diethy1 ether 


Answer- Ethane


Que-  Which one does not exhibit aldol condensation 

a. Ethanal 

b. Acetone 

c. Benzaldehyde 

d. Butanone 


Answer- Benzaldehyde


Que-  For industrial preparation of CH3CHO catalytic promoter is 

a. PdCl2 

b. Cu2Cl2 

c. CuCl2 

d. PbCl2 


Answer- Cu2Cl2


Que-  The common name of propane -1  3-dioic acid is 

a. Oxalic acid 

b. Succinic acid 

c. Malonic acid 

d. Fumaric acid 


Answer- Malonic acid


Que-  Which of the following is not a fatty acid? 

a. Propanoic acid 

b. Acetic acid 

c. Phthalic acid 

d. Butanoic acid 


Answer- Phthalic acid


Que-  Industrial materials thermal power stations are coated with 

a. Polyester resins 

b. Epoxy paints 

c. polyamide resins 

d. Polyvinyl chloride 


Answer- Epoxy paints


Que-  Which one of the following fertilizers provides the nitrogen and phosphorus to the plant? 

a. Urea 

b. Calcium superphosphate 

c. Diammonium phosphate 

d. Potassium nitrate 


Answer- Urea


Que-  Chlorination of water may be harmful if the water contains 

a. Ammonia 

b. Dissolved oxygen 

c. Carbon dioxide 

d. All 


Answer- Carbon dioxide


Que-  Which of the following technique is used for the separation of insoluble particles from liquids? 

a. Filtration 

b. Crystallization 

c. Solvent extraction 

d. Chromatography 


Answer- Filtration


Que-  Which of the following way in used for classification of chromatography? 

a. Shape 

b. Phase 

c. Mechanism 

d. All 


Answer- All


Que-  Fluted filter paper is used to 

a. Filter hot solution 

b. Avoid premature crystallization 

c. Increase the rate of filtration 

d. Decrease the area 


Answer- Increase the rate of filtration


Que-  Safe and the most reliable method of drying crystals is through 

a. Filter paper 

b. Vacuum desiccators 

c. Oven 

d. None of these 


Answer- Vacuum desiccators


Que-  A substance having very high vapour pressure at its melting point on heating will show 

a. Melting 

b. Sublimation 

c. Decomposition 

d. Condensation 


Answer- Sublimation


Que-  A process controlled by Distributive law is 

a. Crystallization 

b. Sublimation 

c. Solvent extraction 

d. Filtration 


Answer- Solvent extraction


Que-  A technique of partition chromatography in which the solvent is in a pool at the bottom of container 

a. Adsorption chromatography 

b. Ascending chromatography 

c. Radial chromatography 

d. Descending chromatography 


Answer- Ascending chromatography


Que-  Different components of a mixture have different Rf values due to 

a. Polar solvent used 

b. Combination of solvents used 

c. Their different distribution coefficients in the solvent 

d. Distributive law 


Answer- Their different distribution coefficients in the solvent


Que-  Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is 

a. Stoichio chemistry 

b. Physical chemistry 

c. Analytical chemistry 

d. Quantum chemistry 


Answer- Analytical chemistry


Que-  Identification of the components of a sample is 

a. Quantitative analysis 

b. Qualitative analysis 

c. Stoichiometry 

d. Physical chemistry 


Answer- Qualitative analysis


Que-  Estimation of amounts of different components in a sample is 

a. Quantitative analysis 

b. Qualitative analysis 

c. Stochiometery 

d. Physical chemistry 


Answer- Quantitative analysis


Que-  The technique used to separate components of mixture in solid phase. 

a. Crystallization 

b. Filtration 

c. Sublimation 

d. Solvent extraction 


Answer- Sublimation


Que-  The solid which is left over the filter paper as a result of filtration 

a. Insoluble particles 

b. residue 

c. crystals 

d. mud 


Answer- residue


Que-  Size of filter paper is selected according to the amount of 

a. solution 

b. amount of insoluble solute 

c. amount of soluble solute 

d. Amount of solvent 


Answer- amount of insoluble solute


Que-  Gooch Crucibles are made up of 

a. plastic 

b. fibre 

c. porcelain 

d. steel 


Answer- porcelain


Que-  Rate of filtration can be increased by applying gentle suction 

a. Gooch crucible 

b. Filter paper 

c. Sintered crucible 

d. All of the above 


Answer- Filter paper


Que-  Sintered crucible is made up of 

a. Plastic 

b. glass 

c. porcetain 

d. fiber 


Answer- glass


Que-  The tip of funnel should touch the wall of the breaker in order to avoid 

a. Inconsistent flow of filtration 

b. splashing 

c. premature crystallization 

d. all of above 


Answer- splashing


Que-  Separation of a solid from its hot saturated solution by cooling is called 

a. vapourization 

b. solvent extraction 

c. filtration 

d. crystallization 


Answer- crystallization


Que-  In crystallization if the solvent is inflammable then direct heating is 

a. needed 

b. avoided 

c. depends on temperature 

d. crystallization does not involve heating 


Answer- avoided


Que-  Which of the following technique is simple and efficient to purify a substance 

a. Filtration 

b. Sublimation 

c. Crystallization 

d. Solvent extraction 


Answer- Solvent extraction


Que-  In solvent extraction ether is used to separate products of organic synthesis from 

a. water 

b. iodine 

c. hydrochloric acid 

d. gases 


Answer- water


Que-  95% ethanol is called 

a. methylated spirit 

b. wood spirit 

c. rectified spirit 

d. absolute alcohol 


Answer- rectified spirit


Que-  The use of CaCl2 and PCl5 in the process of crystallization is as a 

a. oxidizing agent 

b. reducing agent 

c. drying agent 

d. colouring agent 


Answer- drying agent


Que-  Ratio of the amount of solute in organic and aqueous solvent is 

a. Retardation factor 

b. Distribution co-efficient 

c. Distribution in aqueous solution 

d. All statements are wrong 


Answer- Distribution co-efficient


Que-  Without suction pump filtration is 

a. Fast process 

b. Slow process 

c. Rapid process 

d. All are possible 


Answer- Slow process


Que-  Animal charcoal adsorbs the coloured 

a. impurities 

b. crystals 

c. solvents 

d. both a & b 


Answer- impurities


Que-  Direct conversion of solids into vapours is called 

a. Solvent extraction 

b. sublimation 

c. crystallization 

d. vaporization 


Answer- sublimation


Que-  Crystallization does not involve 

a. heating 

b. sublimation 

c. cooling 

d. vaporization 


Answer- sublimation


Que-  In CCI4 I2 shows 

a. Red colour 

b. Purple colour 

c. Blue colour 

d. Yellow colour 


Answer- Purple colour


Que-  Repeated extraction using small portions of solvents is more 

a. Reliable 

b. Efficient 

c. Rapid 

d. slow 


Answer- Efficient


Que-  Silica gel and alumina are used as 

a. Mobile phase 

b. Stationary phase 

c. Mixed phase 

d. Single phase 


Answer- Stationary phase


Que-  Shaking two immiscible liquids increases 

a. Length of contact 

b. Volume of contact 

c. Area of contact 

d. all of above 


Answer- Area of contact


Que-  The solvent or mixture of solvents used for separation of compounds is called 

a. Stationary phase 

b. Mobile phase 

c. Dynamic phase 

d. Static phase 


Answer- Mobile phase


Que-  Which is not a sublime material 

a. Iodine 

b. Benzoic acid 

c. Ammonium chloride 

d. Potash alum 


Answer- Potash alum


Que-  Sintered glass is a porous material used for 

a. absorption 

b. adsorption 

c. filtration 

d. sublimation 


Answer- filtration


Que-  Selection of filter paper depends on size of particles to be 

a. filtered 

b. dried 

c. decolorized 

d. decanted 


Answer- filtered


Que-  The solution remaining after the formation of crystals is called 

a. Mother liquor 

b. Dilute solution 

c. Residue 

d. both a & b 


Answer- Mother liquor


Que-  Which is not related pair of term used in analytical techniques 

a. Filtrate residue 

b. Sublimate sublimation 

c. Drying desiccator 

d. Separating funnel mother liquor 


Answer- Sublimate sublimation


Que-  The major steps involved in complete quantitative analysis are 

a. 2 

b. 3 

c. 4 

d. 5 


Answer- 4


Que-  Main source of organic compounds is 

a. Animal 

b. Fossil 

c. Coal 

d. Plants 


Answer- Animal


Que-  Octane number can be improved by 

a. Isomerization 

b. Adding (C2H5)4 Pb 

c. Adding (CH3)4 Pb 

d. All 


Answer- All


Que-  Hydro carbons which burn with smoky flame are called 

a. Aliphatic 

b. Alicyclic 

c. Aromatic 

d. Aldehyde 


Answer- Aromatic


Que-  Octane number 2 2 4-trimethyl pentane is 

a. 100 

b. 90 

c. 80 

d. 70 


Answer- 100


Que-  Propene can exhibit 

a. cis-trans isomerism 

b. geometric isomerism 

c. both a & b 

d. none of the above 


Answer- none of the above


Que-  Geometric isomerism is usually found in 

a. Alkanes 

b. Alkenes 

c. Alkynes 

d. Esters 


Answer- Alkenes


Que-  Pentane and 2-methyl butance have the same 

a. Boiling point 

b. Melting point 

c. Percentage composition 

d. Structural formula 


Answer- Percentage composition


Que-  Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have 

a. Low melting points 

b. Low vapour pressure 

c. High boiling points 

d. High electrical conductivity 


Answer- Low melting points


Que-  The first organic compound was synthesized in laboratory by 

a. Wohler 

b. Kolbe 

c. Berzilius 

d. Berthelot 


Answer- Wohler


Que-  According to vital force theory 

a. Oorganic compounds can be synthesized from inorganic compounds 

b. organic compounds cannot be synthesized from inorganic compounds 

c. organic compounds can be synthesized by animals 

d. organic compounds can be synthesized by plants 


Answer- organic compounds cannot be synthesized from inorganic compounds


Que-  First organic compound synthesized in laboratory was 

a. tartaric acid 

b. ethyl alcohol 

c. methanol 

d. urea 


Answer- urea


Que-  A double bond consists of 

a. Two sigma bonds 

b. Two Pi bonds 

c. One sigma and one Pi bonds 

d. One sigma and two Pi bonds 


Answer- One sigma and one Pi bonds


Que-  The property of carbon chain formation is called 

a. catenation 

b. hybridization 

c. polymerization 

d. solvation 


Answer- catenation


Que-  Chemical properties of first member of homologous series with respect to other members are 

a. same 

b. different 

c. depends upon number of C atoms 

d. depends upon number of H atoms 


Answer- same


Que-  The organic compounds having very high molecular weight are called 

a. carboxylic acids 

b. ketones 

c. aldehydes 

d. polymers 


Answer- polymers


Que-  Compounds having same molecular formula but differ in structural formula are called 

a. polymer 

b. monomer 

c. isomer 

d. allotropes 


Answer- isomer


Que-  Rate of reactions of most organic compounds are 

a. very slow 

b. very fast 

c. slow 

d. no regular character present 


Answer- slow


Que-  Organic compounds are soluble in 

a. polar solvent 

b. non-polar solvent 

c. alkalies 

d. water 


Answer- non-polar solvent


Que-  Coal is produced after a long time decay of 

a. animals 

b. fossils 

c. wood 

d. all of the above 


Answer- wood


Que-  Methane is used in power generation in chemical industries being a 

a. natural gas 

b. good caloric value 

c. cheaper 

d. All 


Answer- cheaper


Que-  Crude oil is blackish coloured liquid produced after the decay of organic matter present between 

a. earth layer 

b. mountains 

c. sedimentary rocks 

d. rocks 


Answer- sedimentary rocks


Que-  The precess in which larger molecule with higher molecular weight breaks down into smaller moleucles with lower molecular weight 

a. polymerization 

b. pyrolysis 

c. isomerism 

d. no such process occurs 


Answer- pyrolysis


Que-  At low temperature and pressure cracking can be done in presence of catalyst 

a. Al2O3 

b. Fe2O3 

c. Al2O3 and SiO2 

d. Fe2O3 and SiO2 


Answer- Al2O3 and SiO2


Que-  The metallic sound produced by engine due to the pre-ignition of fuel is called 

a. knocking 

b. reforming 

c. cracking 

d. a and c 


Answer- knocking


Que-  Which one of the following compounds shows intense knocking? 

a. n-pentane 

b. iso-heptane 

c. iso-octane 

d. n-heptane 


Answer- n-heptane


Que-  Which of the following can be used as anti-knocking agent. 

a. PbCl2 

b. (C2H5)4 Pb 

c. (C2H5)2 Pb 

d. all of the above 


Answer- (C2H5)4 Pb


Que-  Isomerism which is present only in alkene is 

a. structural isomerism 

b. metamerism 

c. cis-trans isomerism 

d. both b and c 


Answer- cis-trans isomerism


Que-  A single atom or group of atoms which gives characteristic properties to a compound is called 

a. radical 

b. hydrocarbon 

c. functional group 

d. ion 


Answer- functional group


Que-  Compound containing benzene ring in their structure are 

a. aliphatic 

b. aromatic 

c. carboxylic acid 

d. carbohydrates 


Answer- aromatic

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