Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Which of the following unit of concentration is independent of temperature ? 

a. Molarity  

b. Molality  

c. Mole fraction  

d. all 


Answer- Molality


Que- The molal boiling point constant is the ration of the elevation of boiling point to____________________? 

a. Molarity  

b. Molality  

c. More fraction of solvent  

d. Mole fraction of solute 


Answer- Molality


Que- Which has the minimum freezing point ? 

a. One Molal NaCI  

b. One molal KCI solution  

c. One molal CaCI2  

d. One molal urea solution 


Answer- One molal CaCI2


Que- Which of the following substance do not show continuous solubility curve ? 

a. KCIO4  

b. Na2SO4. 10H2O  

c. K2Cr2O7  

d. PbCl2 


Answer- Na2SO4. 10H2O


Que- Every sample of matter with uniform properties and fixed composition is called_________________? 

a. solute  

b. solvent  

c. solution  

d. phase 


Answer- phase


Que- The component of solution which is in smaller amount is called_________________? 

a. solvent  

b. solute  

c. phase  

d. ion 


Answer- solute


Que- 10ml of alcohol dissolve in 90ml of water unit of concentration used is________________? 

a. % w/w  

b. % w/v  

c. % v/v  

d. % v/w 


Answer- % v/v


Que- 58.5g of of NaCl per 1 dm3 of solution of NaCl in water the concentration of solution will be___________________? 

a. 0.1 M  

b. 1 m  

c. 1 M  

d. 0.1 N 


Answer- 1 M


Que- If the volume of solution is equal to sum of volumes of its all components then the solution_____________? 

a. will be an ideal solution  

b. will be non-ideal solution  

c. will show deviations from Raoults law  

d. both b & c 


Answer- will be an ideal solution


Que- The solution which distils over with change in composition________________? 

a. ideal solution  

b. zeotropic solution  

c. azeotropic solution  

d. non-ideal solution 


Answer- zeotropic solution


Que- Concentration of solute molecule when they are in equilibrium with solid substance at particular temperature is called________________? 

a. saturated solution  

b. solubility  

c. unsaturated solution  

d. super saturated solution 


Answer- solubility


Que- The determination of correct molecular weight from Raoults law is applicable to_________________? 

a. a volatile solute in dilute solution  

b. a non-electrolyte & non volatile solute in concentrated solution  

c. a non-electrolyte & non volatile solute in concentrated solute  

d. non volatile solute in a dilute solution 


Answer- non volatile solute in a dilute solution


Que- Beckmanns apparatus is used to measure_______________? 

a. boiling point elevation  

b. depression in freezing point  

c. lowering of vapour pressure  

d. lowering of osmotic pressure 


Answer- depression in freezing point


Que- Hydration is a process in which_________________? 

a. Molecules are surrounded by solvent molecules  

b. Ions are surrounded by solvent molecules  

c. Both ions and molecules are surrounded by solvent molecules  

d. Both ions and molecules are surrounded by water molecules 


Answer- Both ions and molecules are surrounded by water molecules


Que- ppm means________________? 

a. parts of solute in 1000 parts of solvent  

b. parts of solvent in 1000 parts of solute  

c. parts of solute in one million parts of solution  

d. parts of solvent in one million parts of solute 


Answer- parts of solute in one million parts of solution


Que- The relative lowering of vapour pressure is directly proportional to molality if the solution is________________? 

a. concentrated  

b. dilute  

c. saturated solution  

d. all of the above 


Answer- dilute


Que- If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ? 

a. H2 is deposited at cathode  

b. Colour of the solution becomes fade  

c. Cu is deposited at anode  

d. All are possible 


Answer- Colour of the solution becomes fade


Que- Which has maximum oxidation number ? 

a. N  

b. Cr  

c. S  

d. Mn 


Answer- Mn


Que- In an electrolytic cell current flows ? 

a. From cathode to anode in outer circuit  

b. From anode to cathode outside the cell  

c. From cathode to anode inside the cell  

d. both B & C 


Answer- From anode to cathode outside the cell


Que- In a galvanic cell________________? 

a. Chemical energy is converted into electricity  

b. Chemical energy is converted into heat  

c. Electrical energy is converted into chemical energy  

d. Electrical energy is converted into heat 


Answer- Chemical energy is converted into electricity


Que- Molten NaCl conducts electricity due to the presence of_______________? 

a. Free electrons  

b. Free molecules  

c. Free ions  

d. Atoms of Na and Cl 


Answer- Free ions


Que- Electricity in voltaic cell is produced due to_________________? 

a. neutralization  

b. oxidation  

c. reduction  

d. both B & C 


Answer- both B & C


Que- In electrolytic cell electricity carries________________? 

a. spontaneous reaction  

b. non-wpontaneous reaction  

c. neutralization  

d. all of above 


Answer- non-wpontaneous reaction


Que- In Galvanic cell electrons flow from anode to cathode through__________________? 

a. external electric circuit  

b. salt bridge  

c. movement of ions  

d. all of the above 


Answer- external electric circuit


Que- For the measurement of standard electrode potential Zn is dipped in________________? 

a. 1 M ZnO solution  

b. 1 M ZnSO4 solution  

c. 1.5 M ZnSO4 solution  

d. 0.1 M ZnSO4 solution 


Answer- 1 M ZnSO4 solution


Que- Voltaic cell can be recharged by______________? 

a. by addition of fresh solution  

b. by replacing external circuit with external source of electricity  

c. by removal of solution  

d. by heating it 


Answer- by replacing external circuit with external source of electricity


Que- H2 gas in SHE is filled at pressure of___________________? 

a. 760mm of Hg  

b. 750mm of Hg  

c. 780mm of Hg  

d. 800mm of Hg 


Answer- 760mm of Hg


Que- Chemical used in salt bridge is________________? 

a. KOH  

b. KCI  

c. KNO3  

d. KBr 


Answer- KCI


Que- List of elements based on hydrogen scale is called________________? 

a. periodic table  

b. groups  

c. periods  

d. electrochemical series 


Answer- electrochemical series


Que- In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be________________? 

a. greater  

b. lesser  

c. sum of reduction and oxidation potentials  

d. none 


Answer- greater


Que- Greater value of standard reduction potential smaller will be tendency______________? 

a. to form positive ions  

b. to form negative ions  

c. gain electrons  

d. all are possible 


Answer- to form positive ions


Que- Lead accumulators are_______________? 

a. secondary cell  

b. primary cell  

c. voltaic cell  

d. both A & C  


Answer- both A & C 


Que- Capacity of one lead accumulator cell is___________________? 

a. 1.5 volts  

b. 2 volts  

c. 3 volts  

d. 1 volts 


Answer- 2 volts


Que- The strength of solution of an element whose electrode potential is to be measured is________________? 

a. 2M  

b. 1N  

c. 1m  

d. 1M 


Answer- 1M


Que- Voltaic cell is a_________________? 

a. irreversible cell  

b. reversible cell  

c. alkaline cell  

d. all of the above 


Answer- all of the above


Que- Percentage of sulfuric acid in lead accumulator is__________________? 

a. 40%  

b. 25%  

c. 30%  

d. 50% 


Answer- 30%


Que- The half cells are interconnected through________________? 

a. wire  

b. salt bridge  

c. electric circuit  

d. no connection exists 


Answer- salt bridge


Que- Which of the following element act as inert electrode________________? 

a. Cu  

b. Ag  

c. Pt  

d. None 


Answer- Pt


Que- Stronger the oxidizing agent greater is the________________? 

a. Oxidation potential  

b. Reduction potential  

c. Redox potential  

d. emf of cell 


Answer- Reduction potential


Que- Which of the following cell is not rechargeable ? 

a. Lead storage battery  

b. Silver oxide cell  

c. Fuel cell  

d. Ni-Cd cell 


Answer- Silver oxide cell


Que- Which of the following is true in the case of Zn-Cu cell ? 

a. The flow of electrons takes place from copper to zinc  

b. E0red of copper electrode is less than that of zinc electrode  

c. Zinc acts as an anode and copper as cathode  

d. All are correct 


Answer- Zinc acts as an anode and copper as cathode


Que- The degree of dissociation of week electrolyte increases as________________? 

a. Pressure increases  

b. Dilution decreases  

c. Dilution increases  

d. None 


Answer- Dilution increases


Que- In electrolytic solution conductance of electricity is due to _____________________? 

a. free electrons  

b. ions  

c. metals  

d. electrodes 


Answer- ions


Que- Reaction at anode is called________________? 

a. oxidation  

b. reduction  

c. redox  

d. decomposition 


Answer- oxidation


Que- Decrease in oxidation number is called__________________? 

a. oxidation  

b. reduction  

c. oxidation-reduction  

d. all of above represent same entity 


Answer- reduction


Que- Right half cell contains _____________ electrode? 

a. A1  

b. Zn  

c. Cu  

d. Fe 


Answer- Cu


Que- Salt bridge transfers_______________? 

a. electrons  

b. anion  

c. current  

d. ions 


Answer- ions


Que- E0red of an element cab be calculated by comparing it with _____________________? 

a. New electrode of same element  

b. SHE  

c. 1M solution of ions of respective element  

d. 2M solution of HCI 


Answer- SHE


Que- Potential of SHE is considered as__________________? 

a. zero  

b. unity  

c. constant  

d. multiple of 1 


Answer- zero


Que- Electrode potential of Zn is__________________? 

a. oxidation  

b. reduction  

c. oxidation-reduction  

d. depends on the nature of the coupled electrode 


Answer- depends on the nature of the coupled electrode


Que- The element that act as anode always have ______________ position in electrochemical cell? 

a. higher  

b. lower  

c. in middle  

d. no effect of position 


Answer- higher


Que- Greater value of standard reduction potential greater will be tendency__________________? 

a. to get oxidized  

b. to get reduced  

c. to accept electrons  

d. both B and C 


Answer- both B and C


Que- Secondary cell is_____________________? 

a. rechargeable  

b. non rechargeable  

c. electrolytic cell  

d. Daniel cell 


Answer- rechargeable


Que- Density of H2SO4 in lead accumulator is__________________? 

a. 1.25g/cm3  

b. 1.3g/cm3  

c. 1.20g/cm3  

d. 1.15g/cm3 


Answer- 1.25g/cm3


Que- In alkaline battery the anode is made up of______________________? 

a. MnO2  

b. Zn  

c. AgO2  

d. cadmium 


Answer- Zn


Que- Apparent charge on atom in molecule is___________________? 

a. valency  

b. coordination number  

c. oxidation number  

d. charge number 


Answer- oxidation number


Que- In K2Cr2O7 the oxidation number of chromium is____________________? 

a. 7  

b. 6  

c. -7  

d. -6 


Answer- 6


Que- The reduction potential Zn is_________________? 

a. 0.76  

b. -0.76  

c. -0.55  

d. 0.55 


Answer- -0.76


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- 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 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- 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- Non-stoichiometric compounds of transition elements are called___________________? 

a. hydrates  

b. hydrides  

c. binary compounds  

d. interstitial compounds 


Answer- interstitial compounds


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- Which of the following can form a chealate______________________? 

a. ammine  

b. oxalato  

c. carbonyl  

d. cyano 


Answer- oxalato


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- 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- In pig iron the concentration of C-atom is ___________________? 

a. 0.12 — 0.25%  

b. 2.5 — 4.5%  

c. 2.0 — 4.0%  

d. 0.25 — 2.5% 


Answer- 2.5 — 4.5%


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- 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- 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 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- Compounds attracted by applied strong magnetic field are called__________________? 

a. diamagnetic  

b. paramagnetic  

c. good conductor  

d. ferromagnetic 


Answer- paramagnetic


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- 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 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- The central atom along with ligands is called____________________? 

a. complex ion  

b. coordination sphere  

c. ligand  

d. complex compound 


Answer- coordination sphere


Que- In complex compounds the oxidation number is written in___________________? 

a. English  

b. Greek  

c. Roman numeral   

d. Hebrew 


Answer- Roman numeral 


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 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- 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- Polymers described as large molecules built up from small repeating units called________________? 

a. Biopolymers  

b. Dimers  

c. Monomers  

d. metamers 


Answer- Monomers


Que- The important monomers of acryclic resins is__________________? 

a. Vinyl chloride  

b. Styrene  

c. Methylmethacrylate  

d. Hexamethylenediamine 


Answer- Methylmethacrylate


Que- Industrial materials and thermal power stations are coated with______________________? 

a. Polyester resins  

b. Epoxy paints  

c. Polyamide resins  

d. Polyvinyl chloride 


Answer- Epoxy paints


Que- Common example of carbohydrates are__________________? 

a. Cellulose glycogen galactose  

b. Glyceraldehydes glucose peptone  

c. Glycerol phospho lipids collagen  

d. Legumin amylopectin albumin 


Answer- Cellulose glycogen galactose


Que- Hydrolysis of an oligosaccharide in the presence of acid yields________________? 

a. one monosaccharide unit  

b. No monosaccharide unit  

c. 2-9 monosaccharide unit  

d. many monosaccharide 


Answer- 2-9 monosaccharide unit


Que- The process of polymerization was classified by___________________? 

a. Strecker  

b. Sabatier  

c. Runge  

d. W. H. Carothers 


Answer- W. H. Carothers


Que- Protein attached to some non protein group is called____________________? 

a. Derived protein  

b. Sample protein  

c. Proteoses  

d. Conjugated protein 


Answer- Conjugated protein


Que- Lipids are soluble in___________________? 

a. Organic solvents  

b. Organic and inorganic solvents  

c. Inorganic solvents  

d. Solubility has nothing to do with lipids 


Answer- Organic solvents


Que- Animal and vegetable fats are___________________? 

a. Glycerols  

b. Fatty acids  

c. Triesters formed from glycerol and fatty acids  

d. Tetraesters formed from glycerol and fatty acids 


Answer- Triesters formed from glycerol and fatty acids


Que- Triglycerides are easily hydrolyzed by enzymes called_________________? 

a. Lyases  

b. Ligases  

c. Lipases  

d. Hydrolases 


Answer- Lipases


Que- Saponification is the hydrolysis of fat or oil with an__________________? 

a. Acid  

b. Alkali  

c. Enzyme and alkali  

d. Enzyme and acid 


Answer- Alkali


Que- Enzymes from the same organism which catalyze same reaction but are chemically and physically distinct from each other are called______________? 

a. Oxidoreductases  

b. Hydrolases  

c. Isoenzymes  

d. Isomerases 


Answer- Isoenzymes


Que- Enzyme proved useful in cancer treatment is_______________? 

a. Lactic dehydrogenase  

b. Alkaline phosphatase  

c. L-asparaginase  

d. Cellulase 


Answer- L-asparaginase

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