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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