Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Solubility of CaF2 is 2.0×10-4 gdm-3 then Ksp of CaF2 is_______________? 

a. 4.0 x 10-8  

b. 3.2 x 10-11  

c. 2.0 x 10-8  

d. 4.0 x 10-12 


Answer- 3.2 x 10-11


Que- The unit of molality is__________________? 

a. moles dm-3  

b. moles kg-1  

c. gram dm-3  

d. none 


Answer- moles kg-1


Que- A solution can be both____________________? 

a. dilute and concentrated   

b. dilute and saturated  

c. saturated and unsaturated  

d. saturated and super saturated 


Answer- dilute and concentrated 


Que- Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________? 

a. 6  

b. 8  

c. 10  

d. 4 


Answer- 10


Que- Which of the following elements react with steam to produce H2 gas? 

a. Pd  

b. Ni  

c. Sn  

d. All of the above 


Answer- All of the above


Que- The unit of the rate constant (k) is same as that of rate of reaction________________? 

a. First order reaction  

b. Second order reaction  

c. Zero order reaction  

d. Third order reaction 


Answer- Zero order reaction


Que- Acid present in acid rain may be_________________? 

a. H2SO4  

b. HNO3  

c. both A and B  

d. none of the above 


Answer- both A and B


Que- Which of the following elements conduct electricity and also melts below 100°C ? 

a. Aluminium  

b. Sodium  

c. Carbon  

d. Sulphur 


Answer- Sodium


Que- The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________? 

a. Ethylene iodide  

b. Ethylene bromide  

c. Ethylene chloride  

d. Ethylene fluoride 


Answer- Ethylene bromide


Que- Isotopes differs in______________________? 

a. arrangement of electrons in orbitals  

b. position in the periodic table  

c. properties depend upon mass  

d. chemical properties 


Answer- chemical properties


Que- The volume occupied by 1.4g CO at S.T.P is___________________? 

a. 22.4 dm3  

b. 2.24 dm3  

c. 1.12 cm3  

d. 1.12 dm3 


Answer- 1.12 dm3


Que- Which of the following set has all species isoelectronic__________________? 

a. F – Cl – Br  

b. Li+1 – Na+1 – K+1  

c. F – Ne – Na+  

d. H+ – H- – H 


Answer- F – Ne – Na+


Que- Water absorber used in combustion analysis is___________________? 

a. 50% KOH  

b. Lime water  

c. CaCl2  

d. Mg (CIO4)2 


Answer- Mg (CIO4)2


Que- The type of filtering media used for filtration depending upon____________________? 

a. Nature of reactants  

b. Nature of crucible  

c. Nature of product  

d. Nature of precipitate 


Answer- Nature of precipitate


Que- A method of separation of components from its solution using Distribution law is ___________________? 

a. Sublimation  

b. Crystallisation  

c. Solvent extraction  

d. Distillation 


Answer- Solvent extraction


Que- Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________? 

a. one / seventeen  

b. sixteen / seventeen  

c. one / three  

d. two / three 


Answer- one / three


Que- The molecules of CO2 in dry ice form__________________? 

a. Ionic crystal  

b. Covalent crystal  

c. Molecular crystal  

d. Any type of crystal 


Answer- Molecular crystal


Que- Only London dispersion forces are present among the_________________? 

a. Molecules of water in liquid state  

b. Atoms of helium in gaseous state at high temperature  

c. Molecules of hydrogen chloride gas  

d. Molecules of solid iodine 


Answer- Molecules of solid iodine


Que- Quantum number values for 3p orbitals are____________________? 

a. n=3 l=2  

b. n=3 l=0  

c. n=3 l=1  

d. n=3 l=3 


Answer- n=3 l=1


Que- Which specie has unpaired electrons in antibonding molecular orbitals_______________? 

a. O2+2  

b. N2-2  

c. B2  

d. O2-2 


Answer- N2-2


Que- For a given process the heat changes at constant pressure (qp) and at constant volume (qv) are related to each other as___________________? 

a. qp = qv  

b. qp < qv  

c. qp > qv  

d. qp = qv / 2 


Answer- qp > qv


Que- Solubility product of AgCl is 2.0 x 10-10 mol2 dm-6. Maximum Concentration of Ag+1 ions in the solution is__________________? 

a. 2.0 x 10-10 mol dm-3  

b. 1.414 x 10-5 mol dm-3  

c. 1.0 x 10-10 mol dm-3  

d. 1.0 x 10-5 mol dm-3 


Answer- 1.414 x 10-5 mol dm-3


Que- Which of the following solution has the highest boiling point ? 

a. 5.85% NaCl Solution  

b. 18.0 % glucose solution  

c. 6.0 % urea solution  

d. All have same boiling point 


Answer- 5.85% NaCl Solution


Que- Which of the following can be used in laptops ? 

a. Silver oxide battery  

b. Fuel cell  

c. Nickel cadmium cell  

d. Lead accumulator 


Answer- Nickel cadmium cell


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- Ethy1 chloride on reduction in the presence of Zn/HCI produces___________________? 

a. n. butane  

b. Ethanol  

c. Ethane  

d. Diethy1 ether 


Answer- Ethane


Que- For industrial preparation of CH3CHO catalytic promoter is_________________? 

a. PdCl2  

b. Cu2Cl2  

c. CuCl2  

d. PbCl2 


Answer- Cu2Cl2


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- 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- The mass of one mole of electron is________________? 

a. 1.008  

b. 0.55  

c. 0.184  

d. 1.637 


Answer- 0.55


Que- The number of atoms in a molecule determines________________? 

a. macromolecule  

b. macromolecule  

c. molecularity  

d. atomicity 


Answer- atomicity


Que- Which element has same isotopes like palladium___________________? 

a. Nickel  

b. Calcium  

c. Cadmium  

d. Tin 


Answer- Calcium


Que- A limiting reactant is one which________________? 

a. is taken in lesser quantity in grams as compared to other reactants  

b. is taken in lesser quantity in volume as compared to other reactants  

c. gives the maximum amount of the product which is required  

d. gives the minimum amount of the product under consideration 


Answer- gives the minimum amount of the product under consideration


Que- A safe and more reliable method for drying the crystal is__________________? 

a. Hot air currents  

b. folds of filter paper  

c. oven  

d. Vacuum desiccator 


Answer- Vacuum desiccator


Que- A real gas obeying vander waals equation will resemble the ideal gas if_______________________? 

a. Both a and b are small  

b. Both a and b are large  

c. a is small and b is large  

d. a is large and b is small 


Answer- Both a and b are small


Que- Plasma is used in_________________? 

a. Fluorescent bulb  

b. Neon signs  

c. Lasers  

d. All of these 


Answer- All of these


Que- Which of the following is pseudo solid_____________________? 

a. CaF2  

b. NaCl  

c. Glass  

d. Diamond 


Answer- Glass


Que- Bohrs model is contradicted by__________________? 

a. Plancks theory  

b. Dual nature of matter  

c. Heisenbergs uncertainty principle  

d. All of these 


Answer- Heisenbergs uncertainty principle


Que- Atomic radius can be determined by_________________? 

a. X – ray diffraction  

b. Spectrophotometer  

c. Optical microscope  

d. Electron microscope 


Answer- X – ray diffraction


Que- For which system does the equilibrium constant Kc has unit of (concentration)-1__________________? 

a. N2+3H2 2NH3  

b. H2+I2 2HI  

c. 2NO2 N2H4  

d. PCI5 PCI3+CI2 


Answer- 2NO2 N2H4


Que- 18g glucose is dissolved in 90g water the relative lowering in vapour pressure is equal to ___________________? 

a. 8  

b. 5.1  

c. 6  

d. one/fifty one 


Answer- one/fifty one


Que- Stronger is the oxidizing agent greater is the___________________? 

a. Oxidation potential  

b. Redox potential  

c. e.m.f of cell  

d. standard reduction potential 


Answer- standard reduction potential


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- 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- 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 is not the use of silicones________________________? 

a. Lubricant  

b. Water repellent film  

c. Rubber sheet  

d. Medicine 


Answer- Medicine


Que- Chemical composition of cinnabar is____________________? 

a. FeS2  

b. HgS  

c. PbS  

d. ZnS 


Answer- HgS


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

a. 2  

b. 3  

c. 4  

d. 6 


Answer- 6


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- 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 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 is not a good leaving group ? 

a. HSO4-  

b. Cl-  

c. OH-  

d. Br- 


Answer- OH-


Que- The process of fermentation involves all the enzymes except__________________? 

a. Diastase  

b. Invertase  

c. Zymase  

d. Sucrase 


Answer- Sucrase


Que- Which one does not exhibit aldol condensation___________________? 

a. Ethanal  

b. Acetone  

c. Benzaldehyde  

d. Butanone 


Answer- Benzaldehyde


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- Industrial materials thermal power stations are coated with__________________? 

a. Polyester resins  

b. Epoxy paints  

c. polyamide resins  

d. Polyvinyl chloride 


Answer- Epoxy paints


Que- Main source of organic compounds is__________________? 

a. Animal   

b. Fossil  

c. Coal  

d. Plants 


Answer- Animal 


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- Geometric isomerism is usually found in___________________? 

a. Alkanes  

b. Alkenes  

c. Alkynes  

d. Esters 


Answer- Alkenes


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

a. polymer  

b. monomer  

c. isomer  

d. allotropes 


Answer- isomer


Que- Organic compounds are soluble in ____________________? 

a. polar solvent  

b. non-polar solvent  

c. alkalies  

d. water 


Answer- non-polar solvent


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- 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- 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 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- Compound containing benzene ring in their structure are __________________? 

a. aliphatic  

b. aromatic  

c. carboxylic acid  

d. carbohydrates 


Answer- aromatic


Que- Which of the following is an amide________________? 

a. R-NH2  

b. RCONH2  

c. R – NH – R  

d. C6H5NH2 


Answer- RCONH2


Que- Only sigma bonds are present in__________________? 

a. propene  

b. butanoic acid  

c. butanal  

d. ethoxy ethane 


Answer- ethoxy ethane


Que- The structure of ethyne is_________________? 

a. angular  

b. trigonal  

c. linear  

d. trigonal planar 


Answer- linear


Que- The general formula of cycloalkene is __________________? 

a. CnH2n  

b. CnH2n+2  

c. CnH2n-1  

d. CnH2n-2 


Answer- CnH2n-2


Que- C5H12 has the number of isomers ___________________? 

a. one  

b. two  

c. three  

d. four 


Answer- three


Que- Octane number can be improved by________________? 

a. Isomerization  

b. Adding (C2H5)4 Pb  

c. Adding (CH3)4 Pb  

d. All 


Answer- All


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- Pentane and 2-methyl butance have the same_______________? 

a. Boiling point  

b. Melting point  

c. Percentage composition  

d. Structural formula 


Answer- Percentage composition


Que- The first organic compound was synthesized in laboratory by_________________? 

a. Wohler  

b. Kolbe  

c. Berzilius  

d. Berthelot 


Answer- Wohler


Que- First organic compound synthesized in laboratory was _________________? 

a. tartaric acid  

b. ethyl alcohol  

c. methanol  

d. urea 


Answer- urea


Que- The property of carbon chain formation is called _________________? 

a. catenation  

b. hybridization  

c. polymerization  

d. solvation 


Answer- catenation


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

a. carboxylic acids  

b. ketones  

c. aldehydes  

d. polymers 


Answer- polymers


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- Coal is produced after a long time decay of_________________? 

a. animals  

b. fossils  

c. wood  

d. all of the above 


Answer- wood


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- 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- 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- Ether functional group can be represented as ____________________? 

a. OH  

b. R-CO-R  

c. R-O-R  

d. R-COOH 


Answer- R-O-R


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- 2-propanol and 1-propanol show the isomerism________________? 

a. metamerism  

b. functional group isomerism  

c. geometric isomerism  

d. position isomerism 


Answer- position isomerism


Que- In sp3 hybridization the expected geometry of molecules will be__________________? 

a. square planar  

b. trigonal pyramidal  

c. tetrahedral   

d. linear 


Answer- tetrahedral 


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 fractional distillation of petroleum produces gasoline up to ________________? 

a. 10%  

b. 15%  

c. 20%  

d. 30% 


Answer- 20%


Que- Which is not heterocyclic compound _______________? 

a. Furan  

b. Thiophene  

c. Aniline  

d. Pyridine 


Answer- Aniline


Que- Which one is not state function ________________? 

a. Internal energy  

b. Enthalpy  

c. Gibbs free energy  

d. Work 


Answer- Work

Previous Post Next Post