Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________? 

a. Diastase-maltase-zymase  

b. Zymase-maltase-diastase  

c. Maltase-diastase-zymase  

d. Diastase-zymase-maltase 

Answer- Diastase-maltase-zymase

Que- K2Cr2O7/H2SO4 generate____________________? 

a. Oxygen  

b. Hydrogen  

c. Nascent oxygen[O]  

d. Nascent hydrogen[H] 

Answer- Nascent oxygen[O]

Que- Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ? 

a. Primary alcohol  

b. Secondary alcohol  

c. Tertiary alcohol  

d. All of above 

Answer- Tertiary alcohol

Que- Which compound is also known by the name of carbolic acid ? 

a. C2H2OH  

b. H2CO3  

c. C6H5OH  

d. H3PO3 

Answer- C6H5OH

Que- Heating phenol with Zn will yield_________________? 

a. Benzene  

b. Benzoic acid  

c. Phenoxide  

d. Cyclohexane 

Answer- Benzene

Que- Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________? 

a. oxidation  

b. elimination  

c. condensation polymerization  

d. additional polymertization 

Answer- condensation polymerization

Que- Ethanol can be converted into ethanoic acid by_________________? 

a. Hydrogenation  

b. Hydration  

c. Oxidation  

d. Fermentation 

Answer- Oxidation

Que- Methanol can be obtained from_________________? 

a. water gas  

b. destructive distillation of wood  

c. methane  

d. all 

Answer- all

Que- Absolute alcohol is obtained when rectified spirit is treated with__________________? 

a. Ca(OH)2  

b. CaCO3  

c. CaCl2  

d. CaO 

Answer- CaO

Que- Phenol was isolated by Runge from________________? 

a. vegetable oil  

b. coaltar  

c. wood  

d. none of these 

Answer- coaltar

Que- The hydrogenation of phenol in the presence of Ni and heat gives_________________? 

a. cyclohexane  

b. n – hexane  

c. 1 – hexanol  

d. cyclohexanol 

Answer- cyclohexanol

Que- Ethanol and methanol can be distinguished by a__________________? 

a. Iodoform test  

b. Lucas test  

c. Benedicts test  

d. Tollens test 

Answer- Iodoform test

Que- Which one of the following alcohol has greater boiling point___________________? 

a. ethanol  

b. ethylene glaycol  

c. glycerol   

d. methanol 

Answer- glycerol 

Que- Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________? 

a. methanol  

b. methanol  

c. carbonic acid  

d. methane 

Answer- methanol

Que- The formula of starch is__________________? 

a. C12H22O11  

b. C6H10O5  

c. (C6H10O5)n  

d. C6H12O6 

Answer- (C6H10O5)n

Que- The rectified spirit contains________________? 

a. 12% alcohol  

b. 90% alcohol  

c. 95% alcohol  

d. 100% alcohol 

Answer- 95% alcohol

Que- The oxidation of isopropyl alcohol will yield___________________? 

a. propane  

b. Propanol  

c. Propanone  

d. Propanoic acid 

Answer- Propanone

Que- The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________? 

a. Cone. HCI and anhydrous SOCl2  

b. Cone. HCI and anhydrous CaCl2  

c. Cone. HCI and anhydrous PCl2  

d. Cone. HCI and anhydrous ZnCl2 

Answer- Cone. HCI and anhydrous ZnCl2

Que- The given dissociation constant (Ka) value 1.3×10-10 is of_________________? 

a. Alcohol  

b. Acetic acid  

c. Water  

d. Phenol 

Answer- Phenol

Que- When phenol is heated with concentrated nitric acid the product is________________? 

a. Picric acid  

b. o-nitrophenol  

c. 1 3 5 -trinitro benzene  

d. p-nitrophenol 

Answer- Picric acid

Que- Which compound shows hydrogen bonding ? 

a. C2H6  

b. C2H5Cl  

c. CH3OCH3  

d. C2H5OH 

Answer- C2H5OH

Que- Methyl alcohol is not used__________________? 

a. As a solvent  

b. As an antifreezing agent  

c. As a substitute for petrol  

d. For denaturing of ethyl alcohol 

Answer- As a substitute for petrol

Que- An alcohol which can be prepared by fermentation is_________________? 

a. CH3OH  

b. C3H7OH  

c. CH3 – CH2 – OH  

d. C6H5OH 

Answer- CH3 – CH2 – OH

Que- When alcohol reacts with phosphorous halides it geive____________________? 

a. alkyl halides  

b. alkyl amine  

c. alkanes  

d. alkynes 

Answer- alkyl halides

Que- Which one of the following compound does not have – OH group___________________? 

a. ethylene glycol  

b. glycerol  

c. picric acid  

d. ethyl acetate 

Answer- ethyl acetate

Que- Ethers show functional group isomerism with __________________? 

a. aldehydes  

b. ketones  

c. alcohols  

d. carboxylic acid 

Answer- alcohols

Que- Which one of the following is also known as lactic acid ? 

a. 3-Hydroxy propanoic acid  

b. 2-Hydroxy propanoic acid  

c. 2-hydroxy butanoic acid  

d. 3-hydroxy butanoic acid 

Answer- 2-Hydroxy propanoic acid

Que- The easy way of balancing the chemical equation is_________? 

a. according to atom’s atomic number.  

b. According to atom’s atomic mass.  

c. First we balance Metal than non-metal than Hydrogen than Oxygen.  

d. None of the above 

Answer- First we balance Metal than non-metal than Hydrogen than Oxygen.

Que- Which of the following noble gases is not present in atmosphere? 

a. Argon  

b. Helium  

c. Radon  

d. Xenon 

Answer- Radon

Que- Which of the following noble gases is abundant in air? 

a. Neon  

b. Helium  

c. Argon  

d. Methane 

Answer- Argon

Que- Which law states that “equal volumes of all gases, at the same temperature and pressure, have the same number of molecules? 

a. Boyle’s law  

b. Charles’ law  

c. Gay-Lussac’s law  

d. Avogadro’s law 

Answer- Avogadro’s law

Que- Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature? 

a. Charles’ Law  

b. Avogadro’s Law  

c. Graham’s Law  

d. Boyle’s law 

Answer- Charles’ Law

Que- Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density? 

a. Graham’s Law  

b. Gay-Lussac’s law  

c. Boyle’s law  

d. None of these 

Answer- Graham’s Law

Que- The valency of carbon Atom is __________ ? 

a. 1  

b. 2  

c. 3  

d. 4 

Answer- 4

Que- What is the Chemical formula of Zinc Hydroxide _________ ? 

a. Zn(OH)2  

b. ZNO2  

c. Zn2(OH)3  

d. ZnOH 

Answer- Zn(OH)2

Que- Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ? 

a. Zeolites  

b. Sulphonides  

c. Lime  

d. Nitrates 

Answer- Zeolites

Que- Which among the following is not a property of Ionic bond _________? 

a. Sharing of electrons  

b. Transfer of electrons  

c. Losing of electrons  

d. Gain of electrons 

Answer- Sharing of electrons

Que- Sum of protons and neutrons in an atom gives off _________ ? 

a. Nucleon numbera  

b. Mass number  

c. Atomic number  

d. Both A and B 

Answer- Both A and B

Que- What is the molecular weight of Ammonia (NH3) ________ ? 

a. 17.031 g/mol  

b. 18.031 g/mol  

c. 19.031 g/mol  

d. 27.033 g/mol 

Answer- 17.031 g/mol

Que- The absolute value of charge on electron was determined by ________ ? 

a. J.J.Thomson  

b. Chadwick  

c. Rutherford  

d. Robert Millikan 

Answer- Robert Millikan

Que- The discovery of neutron became very late because _______ ? 

a. It does not carry any charge  

b. It does not move  

c. It is a fundamental particle  

d. It is present in nucleus 

Answer- It does not carry any charge

Que- What is the molecular formula for Nitric acid ________ ? 

a. HNO2  

b. HNO3  

c. HN2O2  

d. H2NO4 

Answer- HNO3

Que- What is the molecular Weight of Nitric acid (HNO3 ) ? 

a. 63.012 g/mol  

b. 65.012 g/mol  

c. 70.012 g/mol  

d. 81.011 g/mol 

Answer- 63.012 g/mol

Que- The Branch of chemistry dealing with brewing and distilling is called _______ ? 

a. Zygology  

b. Zymology  

c. Zymurgy  

d. Zootaxy 

Answer- Zymurgy

Que- The science of fermentation is called _______ ? 

a. Zygology  

b. Zymology  

c. Zymurgy  

d. Zootaxy 

Answer- Zymology

Que- The reciprocal of the coefficent of viscosity is called__________? 

a. Density  

b. Specific gravity  

c. Fluidity  

d. Absorbance 

Answer- Fluidity

Que- For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________? 

a. 3P  

b. P/3  

c. 3P/T  

d. 6P 

Answer- P/3

Que- A theoretical link between quantum mechanics and thermodynamics is_________? 

a. Electrchemistry  

b. Matrix mechanics  

c. Statistical thermodynamics  

d. Soectroscopic analysis 

Answer- Statistical thermodynamics

Que- Stainless steel contains___________? 

a. Fe+Cr+Ni  

b. Fe+Ni+Cu  

c. Fe+ Cr+Cu  

d. Cu+C+Ni 

Answer- Fe+Cr+Ni

Que- Carbon in wrought iron is present as_________? 

a. Silicon carbide  

b. Iron carbide  

c. Graphite  

d. Partly as iron carbide and partly as graphite 

Answer- Iron carbide

Que- If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________? 

a. Annealing  

b. Quenching  

c. Tempering  

d. Nitriding 

Answer- Annealing

Que- The substance used in cancer therapy is___________? 

a. Fe  

b. Co  

c. Ni  

d. Rn 

Answer- Co

Que- Transition elements, in general, exhibit the following properties, except one. Name that property? 

a. Variable oxidation state  

b. Natural Radioactivity  

c. Tendency to form complexes  

d. Formation of alloys 

Answer- Natural Radioactivity

Que- Which of the following alloys contain(s) Cu and Zn? 

a. Bronze  

b. Brass  

c. Gun-metal  

d. Type metal 

Answer- Brass

Que- Which of the following is soluble in water? 

a. AgF  

b. AgCl  

c. AgBr  

d. AgI 

Answer- AgF

Que- The maximum oxidation shown by manages is_________? 

a. +2  

b. +4  

c. +5  

d. +7 

Answer- +7

Que- Colour in transition metal compounds is attributed to____________? 

a. Small sized metal ions  

b. Absorption of light in UV region  

c. Complete ns sub-shell  

d. Incomplete (n-1) d sub-shell 

Answer- Incomplete (n-1) d sub-shell

Que- Which of the following statements is false about transition metals? 

a. They form complexes  

b. They show variable valency  

c. All transition metal compounds are paramagnetic  

d. They form coloured ions 

Answer- All transition metal compounds are paramagnetic

Que- The by-product of the process of Saponification is___________? 

a. Methanol  

b. Glycol  

c. Glycerol  

d. Sodium hydroxide 

Answer- Glycerol

Que- Polyethylene Glycols are used in the preparation of which type of detergents? 

a. Cationic detergents  

b. Anionic detergents  

c. Non-ionic detergents soap  

d. All of above 

Answer- Non-ionic detergents soap

Que- _____________ surfactants perform well over a wide range water hardness and PH? 

a. Anionic  

b. Cationic  

c. Nonionic  

d. Neutral 

Answer- Nonionic

Que- Commercial detergents contain mainly _____________? 

a. RCOON  

b. RONa  

c. RSNa  

d. ROsO3Na Muhammad Ali Kunbhar 

Answer- RCOON

Que- Which one of the following is caustic potash? 

a. NaOH  

b. KOH  

c. NaCl  

d. NaBH4 

Answer- KOH

Que- The carbon-carbon bond strength is maximum in__________? 

a. CH3CH3  

b. CH2=CH2  

c. Benzene  

d. Cyclohexane 

Answer- CH3CH3

Que- Which of the following effects best explains that o-nitrophenol is insoluble in water? 

a. Inductive effect  

b. Resonance effect  

c. Intermolecular H-bonding  

d. Isomeric effect 

Answer- Intermolecular H-bonding

Que- Which one of the following is most acidic? 

a. Phenol  

b. P-nitrophenol  

c. O-nitrophenol  

d. M-nitrophenol 

Answer- P-nitrophenol

Que- Chlorine Cl when attached to benzene has________? 

a. +I and +R effect  

b. -1 and +R effect  

c. +1 and -R effect  

d. -I and -R effect 

Answer- -1 and +R effect

Que- The criteria for aromaticity is presence of_________? 

a. Unsaturations  

b. Cyclic structure  

c. Presence of 4nπ electrons  

d. Presence of 4n+2π electrons 

Answer- Presence of 4n+2π electrons

Que- The bond angle between hybrid orbitals in methane CH3 is___________? 

a. 115.5°  

b. 109.5°  

c. 105. 7°  

d. 180° 

Answer- 109.5°

Que- The bond length of C=C is___________? 

a. 1.20A°  

b. 1.34A°  

c. 1.54A°  

d. 1.68A° 

Answer- 1.68A°

Que- The stationary and mobile phases in paper chromatography are____________? 

a. Liquid/liquid  

b. Solid/liquid  

c. Liquid/solid  

d. Liquid/gas 

Answer- Solid/liquid

Que- Beillstein test is used for________? 

a. Cl  

b. N2  

c. CO2  

d. CO 

Answer- Cl

Que- Presence of nitrogen in organic compounds is tested as__________? 

a. Nitrogen gas  

b. NH3  

c. CN‾  

d. NO 

Answer- CN‾

Que- The molar mass of an organic acids is determined by____________? 

a. Depression of freezing point  

b. Volumetric method  

c. Victor Meyer’s method  

d. Osmosis method 

Answer- Volumetric method

Que- The IUPAC suffix used for _______ NC group? 

a. Cyanide  

b. Isocyanides  

c. Nitrile  

d. Carbylamines 

Answer- Nitrile

Que- The IUPAC name of ethylene oxide is__________? 

a. Epoxy methane  

b. Oxoethene  

c. Methoxymethane  

d. Oxirane 

Answer- Oxoethene

Que- The IUPAC name of HCONH2 is___________? 

a. Methanamide  

b. Methanoylamine  

c. Aminoethanol  

d. Formanide 

Answer- Methanamide

Que- The compound (CH3)3COH according to IUPAC is known as ___________? 

a. Tert-Butanol  

b. 2,2-Dimethyl-propanol  

c. Tert Alcohol  

d. 1,1- Diethylethanol 

Answer- 2,2-Dimethyl-propanol

Que- The PH of the 0.0032 M H2SO4 is__________? 

a. 3.2  

b. 4.0  

c. 2.198  

d. 1.0 

Answer- 3.2

Que- The PH of the 1.3 × 10-4 NH4Cl is__________? 

a. 1.3  

b. 4.0  

c. 2.886  

d. 3.886 

Answer- 3.886

Que- The PH of milk is __________? 

a. 6.0  

b. 6.5  

c. 7.0  

d. 7.5 

Answer- 6.5

Que- The PH of Tears is __________? 

a. 7.0  

b. 7.4  

c. 7.8  

d. 8.2 

Answer- 7.4

Que- The PH of pure water at 25°C, kw=1×10-4____________? 

a. 0  

b. 7  

c. 14  

d. None of above 

Answer- 7

Que- When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its? 

a. 0.115  

b. 0.900  

c. 0.015  

d. 0.215 

Answer- 0.115

Que- Alpha particles can be detected by using___________? 

a. Gold foils  

b. Barium sulphate  

c. Zinc sulphide screen  

d. Thin Aluminium sheet 

Answer- Zinc sulphide screen

Que- Which one of the following is the correct sequence according to atomic weights? 

a. Fe>Co> Ni  

b. Co > Ni > Fe  

c. Ni> Co> Fe  

d. Co >Fe>Ni 

Answer- Co > Ni > Fe

Que- Generally the limit of visible spectrum is__________? 

a. 1000 to 300 A°  

b. 3800 to 7600 A°  

c. 8000 to 10,000 A°  

d. 12,000 to 15,000 A° 

Answer- 3800 to 7600 A°

Que- If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________? 

a. 2 R  

b. R/2  

c. 3R/4  

d. R/4 

Answer- 3R/4

Que- Magnetic quantum number specifies___________? 

a. Size of orbitals  

b. Shape of orbitals  

c. Orientation of orbitals  

d. All of the above 

Answer- Orientation of orbitals

Que- Azimuthal quantum number defines___________? 

a. e/m ratio of an electron  

b. Spin of an electron  

c. Angular momentum of an electron  

d. Magnetic momentum of an electron 

Answer- Angular momentum of an electron

Que- The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________? 

a. 159.6kJ  

b. 135.5 KJ  

c. 110.5 KJ  

d. 80.4 KJ 

Answer- 159.6kJ

Que- Which of the following gases shows more ideal behaviour at 0°C___________? 

a. H2  

b. CH4  

c. He  

d. NH3 

Answer- He

Que- In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________? 

a. Double  

b. Same  

c. Half  

d. Four times 

Answer- Double

Que- Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C? 

a. 546 °C  

b. 546 K  

c. 200°C  

d. 273 K 

Answer- 546 K

Que- The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________? 

a. CH4  

b. CO2  

c. C2H4  

d. Xe 

Answer- CO2

Que- Which of the following haloalkane is hydrolysed by SN1 mechanism? 

a. CH3Br  

b. CH3CH2Br  

c. CH3CH2CH2Br  

d. (CH3)3CBr 

Answer- (CH3)3CBr

Que- Hydrocarbon is formed when Grignard reagent is treated with___________? 

a. H2O  

b. CH3OH  

c. Both a and b  

d. None of the above 

Answer- H2O

Que- Grignard reagent gives carboxylic acid with____________? 

a. CO2  

b. CH3CHO  

c. COC2  

d. HCN 

Answer- CO2

Que- The law of traids is applicable to__________? 

a. Li, Be, B  

b. F, Cl, Br  

c. Cl, Br, I  

d. Na, K, Rb 

Answer- Cl, Br, I

Que- The concept of telluric helix was developed by___________? 

a. Lother Meyer  

b. A.E de Chancourtois  

c. Newland  

d. Dobereiner 

Answer- A.E de Chancourtois

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