Chemistry MCQs with Answers – Free Bio MCQs Test for All Topics

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Q1 : Real gases show ideal behavior at_______?

A: Low Temp & High Pressure B: High Temp & Low Pressure C: High Temp & High pressure D: Low Temp & Low Pressure

Q2 : Which of the following is unit of Viscosity?

A: Decibell B: Torr C: Poise D: Hertz

Q3 : Viscosity of a liquid________by increasing temperature?

A: Remains same B: Increases C: Decreases D: None

Q4 : Which instrument is used to measure the viscosity.?

A: Hygrometer B: Hydrometer C: Anemometer D: Viscometer

Q5 : Surface Tension ________with increasing the surface area of liquid?

A: Decreases B: Increases C: Remains Same D: None

Q6 : Hydrogen bonding is present in __________?

A: Water B: Ethyl Alcohol C: Phenol D: All of these

Q7 : Acetaldehyde cannot show

A: Iodoform test B: Lucas test C: Benedict’s test D: Tollen’s test

Q8 : The Clemmenson reduction of acetone yields

A: Ethanol B: Ethanal C: Propane D: Propanol

Q9 : O3 reacts with CH2CH2 to form ozonide. On hydrolysis it forms

A: Ethylene oxide B: HCHO C: Ethylene glycol D: Ethyl alcohol

Q10 : Dimethyl ketones are usually characterized through_____________?

A: Tollen’s reagent B: Iodoform test C: Schiff’s test D: Benedict’s reagent

Q11 : Silver mirror is a test for ____________?

A: Aldehydes B: Thio alcohols C: Amines D: Ethers

Q12 : The typical reactions of aldehyde is _____________?

A: Electrophilic addition B: Nucleophilic substitution C: Nucleophilic addition D: Nucleophilic elimination

Q13 : Fehling solution react with HCHO to form precipitate of _____________?

A: White colour B: Yellow colour C: Red colour D: Blue colour

Q14 : In Aldehydes and Ketones, carbon of carbonyl group is ____________?

A: sp3 hybridised B: sp2 hybridised C: sp hybridised D: Unhybridised

Q15 : Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde

A: CH4 B: C2H6 C: C2H4 D: C2H2

Q16 : The process by which a substance absorbs moisture upon exposure to atmosphere is called?

A: Efflorescence B: Dehydrogenation C: Desalination D: Deliquescence

Q17 : Amino acids are a product of the digestion of: ___________?

A: Carbohydrates B: Fats C: Proteins D: Vitamins

Q18 : 24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following

A: SO3 B: SO2 C: C6H6 D: C3H8

Q19 : The maximum mass is present in 1dm3 for the following gas at STP.

A: C3H8 B: CO2 C: CO D: CS2

Q20 : The maximum amount of product obtained by balanced chemical equation is called as __________?

A: Practical yield B: Theoretical yield C: Actual yield D: NOT

Q21 : The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:

A: 40g B: 43.6g C: 45g D: 41.4g

Q22 : The one mole of _____molecule has the highest number of atoms?

A: H2SO4 B: HClO4 C: O3 D: H2C2O4

Q23 : The number of moles are present in 9.5g of CS2?

A: 1.5 B: 0.25 C: 0.125 D: None of These

Q24 : In Periods from Left to right Electronegativity will: _________?

A: increase B: decrease C: constant D: none of these

Q25 : The reaction of C2H5OH with conc. H2SO4 does not give_________?

A: Ethene B: Diethyl ether C: Acetylene D: Ethyl hydrogen sulphate

Q26 : Methyl alcohol on oxidation with acidified K2Cr2O7 gives__________?

A: CH3COOH B: CH3CHO C: HCOOH D: CH3COCH3

Q27 : Identify the Lucas reagent among the following

A: Conc. HCl & Anhydrous ZnCl2 B: Dil. HCl & hydrated ZnCl2 C: Conc. HNO3 & Anhydrous ZnCl2 D: Conc. HNO3 & Anhydrous MgCl2

Q28 : Alcohols of lower Molecular weight are _______________?

A: More Soluble in water B: Insoluble in water C: Soluble in water on heating D: Insoluble in all solvents

Q29 : On reduction with LiAlH4 ,Ketone gives__________?

A: Primary Alcohol B: Secondary Alcohol C: Tertiary alcohol D: None of These

Q30 : An alcohol produced during the formation of a soap process.

A: Butanol B: Ethylene glycol C: Ethanol D: Glycerol

Q31 : On oxidation, an alcohol gives an aldehyde having same number of carbon atoms as in alcohol, the alcohol is____

A: Primary Alcohol B: Secondary Alcohol C: Tertiary alcohol D: None of These

Q32 : LiAlH4 converts Acetaldehyde into ___________?

A: Acetic acid B: Methane C: Ethyl alcohol D: Methyl alcohol

Q33 : If speed of gas molecules increases by twice on heating. What will be their kinetic energy?

A: increases by two times B: increases by four times C: decreases by two times D: decrease by four times

Q34 : The oxidation of secondary alcohol gives ?

A: alkane B: carboxylic acid C: Acetylene D: ketone

Q35 : The molecular formula of Methane gas is___________?

A: NH3 B: CH4 C: CO2 D: C6H6

Q36 : The molecular formula of Sucrose(Sugar) is___________?

A: NH3 B: C12H22O11 C: C6H12O6 D: C6H6

Q37 : The molecular formula of Glucose is____________?

A: NH3 B: C12H22O11 C: C6H12O6 D: C6H6

Q38 : Identify the Molecular mass for Glucose (C6H12O6) among the following.

A: 190amu B: 188amu C: 180amu D: 98amu

Q39 : Ethene is the first member of __________?

A: Alkenes Family B: Saturated hydrocarbon C: Aromatic hydrocarbon D: None of These

Q40 : The petrol having octane number 80 has ____________?

A: 20% n- heptane + 80% iso-octane B: 80% n- heptane + 20% iso-octane C: 20% n- heptane + 80% n-octane D: 80% n-heptane + 20% n- octane

Q41 : The organic compound used as antiknock agent in petroleum is____________?

A: (C2H5 )4Pb B: TNT C: CH MgBr3 D: C2H5 )2Hg

Q42 : Octane number is 0 value for ___________?

A: iso-octane B: n-hexane C: n-heptane D: iso-heptane

Q43 : Octane number is 0 value for ___________?

A: iso-octane B: n-hexane C: n-heptane D: iso-heptane

Q44 : The salt that gives the aqueous solution with pH less than 7, is called as____________?

A: Basic salt B: Acidic salt C: Neutral salt D: Amphoteric salt

Q45 : The heaviest subatomic particle among the following is_________?

A: Electron B: Proton C: Neutron D: All have mass

Q46 : The rays that have negative charge are ___________?

A: Anode Rays B: Cathode Rays C: Canal Rays D: Gamma Rays

Q47 : The Maximum mass of an atom is present in ___________?

A: Shell B: Nucleus C: Energy levels D: Orbit

Q48 : The subatomic particle that has negative charge is___________?

A: Electron B: Proton C: Neutron D: None of These

Q49 : Nucleus of an atom was discovered by___________?

A: Goldstein B: James Chadwick C: J J Thomson D: Rutherford

Q50 : The general formula for alkenes is:______________?

A: CnH2n+1 B: CnH2n+2 C: CnH2n D: CnH2n-2

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Chemistry MCQs with Answers – Free Bio MCQs Test for All Topics

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