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

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