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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