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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