Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 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-  Acetic anhydride can be obtained by treating ethyl alcohol with 

a. P2O5 

b. H2SO4 

c. Both a and b 

d. PCI5 


Answer- Both a and b


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-  Phosphorous acid upon thermal decomposition yields phosphoric acid and 

a. Phosphine 

b. Phosphorus 

c. Water 

d. Phosphorus pentoxide 


Answer- Phosphine


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-  P2O5 is a hygroscopic powder which sublimes at 

a. 260Degree Centigrade 

b. 360Degree Centigrade 

c. 630Degree Centigrade 

d. 620Degree Centigrade 


Answer- 360Degree Centigrade


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

a. S 

b. Se 

c. Te 

d. Po 


Answer- S


Que-  Phosphoric acid is a weak acid and its basicity is 

a. 1 

b. 3 

c. zero 

d. 2 


Answer- 3


Que-  All the elements in group VIA are _______ in nature. 

a. hygroscopic 

b. metals 

c. polymeric 

d. all of above 


Answer- polymeric


Que-  Which allotropic form of phosphorous is the most stable? 

a. White 

b. black 

c. red 

d. Violet 


Answer- black


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

a. SO2 

b. H2S 

c. CO2 

d. C2H4 


Answer- H2S


Que-  The chemical composition of cinnabar is 

a. ZnS 

b. PbS 

c. HgS 

d. FeS 


Answer- HgS


Que-  FeSO4 forms brown ring with 

a. N2O3 

b. NO2 

c. NO 

d. N2O 


Answer- NO


Que-  Oxygen and sulphur resemble in all except 

a. Electronic conviguration of valence shell electrons 

b. Show allotropy 

c. Polymeric 

d. Show same oxidation state 


Answer- Show same oxidation state


Que-  Oxygen does not react with all except 

a. Alkali 

b. Acid 

c. Water 

d. Metals 


Answer- Metals


Que-  Arsenic oxides are removed by passing through 

a. Ferric hydroxide 

b. Sodium hydroxide 

c. Calcium hydroxide 

d. Aluminium hydroxide 


Answer- Ferric hydroxide


Que-  In which compound nitrogen has maximum oxidation state 

a. N2O 

b. NO2 

c. HNO2 

d. HNO3 


Answer- HNO3


Que-  When sulphuric acid is treated with ethanol sulphuric acid behaves like 

a. an acid 

b. a dehydrating agent 

c. an oxidizing agent 

d. as sulphonating agent 


Answer- a dehydrating agent


Que-  Among the halogens the rare element is 

a. Fluorine 

b. Chlorine 

c. Astatine 

d. Iodine 


Answer- Astatine


Que-  The colour of chlorine gas is 

a. pale yellow 

b. freenish yellow 

c. reddish brown 

d. grayish black 


Answer- freenish yellow


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

a. F2 

b. Cl2 

c. Br2 

d. I2 


Answer- Cl2


Que-  Which one of the following is the weakest acid in water 

a. HF 

b. HCI 

c. HBr 

d. HI 


Answer- HF


Que-  The halogen which reacts very slowly with halogen is 

a. Fluorine 

b. Chlorine 

c. Bromine 

d. Iodine 


Answer- Iodine


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-  The halogen having highest electron affinity is 

a. Fluorine 

b. Chlorine 

c. Bromine 

d. Iodine 


Answer- Chlorine


Que-  Which is the strongest acid? 

a. HCIO 

b. HCIO2 

c. HCIO3 

d. HCIO4 


Answer- HCIO4


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

a. Iodine solution 

b. Chlorine 

c. NaCl 

d. Ki 


Answer- Chlorine


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 halogen can displace other three elements? 

a. Flourine 

b. Chlorine 

c. Iodine 

d. Bromine 


Answer- Flourine


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-  The chemical formula of sodium hypochlorite is 

a. NaCLO 

b. NaClO2 

c. NaClO3 

d. NaClO4 


Answer- NaCLO


Que-  Fluorine can react with 

a. Xe 

b. Kr 

c. Rn 

d. All of the above 


Answer- All of the above


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

a. XeF4 

b. XeOF4 

c. XeOF2 

d. Na4XeO6 


Answer- XeOF4


Que-  Photographic plates are coated with a thin film of : 

a. AgNO3 

b. AgI 

c. AgCl 

d. AgBr 


Answer- AgBr


Que-  The anhydride of HCIO4 is: 

a. Cl2O 

b. Cl2O6 

c. ClO2 

d. Cl2O7 


Answer- Cl2O7


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-  Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is 

a. 2 

b. 6 

c. 4 

d. 8 


Answer- 6


Que-  K2 (Cu(CN)4) which one is correct 

a. Potassium tetra cyano cupperate 

b. Co-ordination number is 2 

c. Ligand is positively charged 

d. Central atom is present in avionic sphere 


Answer- Central atom is present in avionic sphere


Que-  The oxidation number of central metal atom in [Ni(CO)4] is 

a. 0 

b. 2 

c. 4 

d. 6 


Answer- 4


Que-  Group VIB of transition elements contains 

a. Zn Cd Hg 

b. Fe Ru Os 

c. Cr Mo W 

d. Mn Te Re 


Answer- Cr Mo W


Que-  The leements in which d or f orbitals are in the process of completion are 

a. outer transition elements 

b. inner transition elements 

c. typical transition elements 

d. transition elements 


Answer- transition elements


Que-  The location of transition elements is in between 

a. lanthanides & actinides 

b. s and p block elements 

c. chalcogens and halogens 

d. d and f block elements 


Answer- s and p block elements


Que-  The melting points and boiling points upto meddle of 3d- series 

a. increases 

b. decreases 

c. remain same 

d. no regular trend 


Answer- increases


Que-  Pure metal 

a. corrode slowly 

b. corrode rapidly 

c. does not corrode easily 

d. none of these 


Answer- does not corrode easily


Que-  Compounds attracted by applied strong magnetic field are called 

a. diamagnetic 

b. paramagnetic 

c. good conductor 

d. ferromagnetic 


Answer- paramagnetic


Que-  The correct electronic configuration of Cr is 

a. [Ar]4s23d4 

b. [Ar] 4s23d4 

c. [Ar]4s03d5 

d. [Ar]4s13d5 


Answer- [Ar]4s13d5


Que-  The oxidation state of transition elements is usually 

a. variable 

b. constant 

c. single 

d. infinite 


Answer- variable


Que-  When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in 

a. orbitals of f-subshell 

b. orbitals of d-subshell 

c. orbitals of p-subshell 

d. both a & b 


Answer- both a & b


Que-  Non-stoichiometric compounds of transition elements are called 

a. hydrates 

b. hydrides 

c. binary compounds 

d. interstitial compounds 


Answer- interstitial compounds


Que-  When a compound of transition element is dissolved in a solution of salt then it produces 

a. simples ions 

b. complex ions 

c. double salts 

d. strong anions 


Answer- complex ions


Que-  The specie which donates electrons to central metal atom in coordination sphere is called 

a. anion 

b. cation 

c. Ligand is positively charged 

d. acid 


Answer- Ligand is positively charged


Que-  The species which donate two electron pairs in a coordination compound is called 

a. ligand 

b. mono-dentate ligand 

c. poly-dentate ligand 

d. bi-dentate ligand 


Answer- bi-dentate ligand


Que-  Which of the following can form a chealate 

a. ammine 

b. oxalato 

c. carbonyl 

d. cyano 


Answer- oxalato


Que-  The central atom along with ligands is called 

a. complex ion 

b. coordination sphere 

c. ligand 

d. complex compound 


Answer- coordination sphere


Que-  The compound or complex ion which has a ring in its structure 

a. polydentate ligand 

b. chelate 

c. monodentate ligand 

d. hydrate 


Answer- chelate


Que-  In complex compounds the oxidation number is written in 

a. English 

b. Greek 

c. Roman numeral 

d. Hebrew 


Answer- Roman numeral


Que-  Geometry of the complex compounds usually depends upon 

a. type of ligands 

b. types of hybridization in the elements of ligands 

c. hybridization of central metal 

d. All of above 


Answer- hybridization of central metal


Que-  When the central atom of coordination compound is sp3d2 hybridization the expected geometry will be 

a. tetrahedral 

b. square planar 

c. trigonal bipyramidal 

d. octahedral 


Answer- octahedral


Que-  In pig iron the concentration of C-atom is 

a. 12 --- 0.25% 

b. 5 --- 4.5% 

c. 0 --- 4.0% 

d. 25 --- 2.5% 


Answer- 5 --- 4.5%


Que-  In the production of wrought iron Mg Si and P are removed in the form of 

a. oxides 

b. silicates 

c. slag 

d. carbonates 


Answer- slag


Que-  With impurities like P and S the open hearth furnace is lined with. 

a. SiO2 

b. Fe2O3 

c. FeO 

d. CaO MgO 


Answer- CaO MgO


Que-  Which is sold as fertilizer 

a. CaSiO3 

b. Na2SiO3 

c. Ca3(PO4)2 

d. MnSiO3 


Answer- Ca3(PO4)2


Que-  Any process of chemical decay of metals due to the action of surrounding medium is called 

a. activation 

b. enameling 

c. corrosion 

d. coating 


Answer- corrosion


Que-  When an active metal like Al comes in contact with less active element like Cu then it produces 

a. dry cell 

b. galvanic cell 

c. electrolytic cell 

d. a and b 


Answer- galvanic cell


Que-  Which of the following is typical transition metal? 

a. Sc 

b. Y 

c. Cd 

d. Co 


Answer- Co


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 mass of one mole of electron is 

a. 008 

b. 55 

c. 184 

d. 637 


Answer- 55


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

a. 4 dm3 

b. 24 dm3 

c. 12 cm3 

d. 12 dm3 


Answer- 12 dm3


Que-  The number of atoms in a molecule determines 

a. macromolecule 

b. macromolecule 

c. molecularity 

d. atomicity 


Answer- atomicity


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-  Which element has same isotopes like palladium 

a. Nickel 

b. Calcium 

c. Cadmium 

d. Tin 


Answer- Calcium


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-  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-  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 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 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-  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-  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-  Which of the following is pseudo solid 

a. CaF2 

b. NaCl 

c. Glass 

d. Diamond 


Answer- Glass


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-  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-  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-  Atomic radius can be determined by 

a. X - ray diffraction 

b. Spectrophotometer 

c. Optical microscope 

d. Electron microscope 


Answer- X - ray diffraction


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

a. 0 x 10-10 mol dm-3 

b. 414 x 10-5 mol dm-3 

c. 0 x 10-10 mol dm-3 

d. 0 x 10-5 mol dm-3 


Answer- 414 x 10-5 mol dm-3


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

a. 85% NaCl Solution 

b. 0 % glucose solution 

c. 0 % urea solution 

d. All have same boiling point 


Answer- 85% NaCl Solution


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 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

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