Chemistry MCQs

A. It is a sterilising agent.
B. It dissolves the impurities of water.
C. It is a reducing agent.
D. It is an oxidising agent.

Submitted by: Muhammad Ali Kunbhar

Correct Answer: D. It is an oxidising agent. ✔

A. Nitrogen
B. Ethane
C. Methane
D. Hydrogen

Submitted by: Muhammad Ali Kunbhar

Correct Answer: C. Methane ✔

A. Bromine
B. Fluorine
C. Chlorine
D. Sulphur

Submitted by: Muhammad Ali Kunbhar

Correct Answer: D. Sulphur ✔

A. 3%
B. 3.5%
C. 2.5%
D. 2%

Submitted by: Muhammad Ali Kunbhar

Correct Answer: B. 3.5% ✔

A. Pain Killer
B. Fire Extinguisher
C. Mosquito Repellent
D. Petrol Additive

Submitted by: Muhammad Ali Kunbhar

Correct Answer: D. Petrol Additive ✔

A. Copper
B. Aluminum
C. Lead
D. Tungsten

Submitted by: Muhammad Ali Kunbhar

Correct Answer: D. Tungsten ✔

Option A: H3PO3

Option B: H3PO4

Option C: H3PO2

Option D: H2P2O7

Correct Answer: H3PO2 ✔

Option A: Sulphur dioxide

Option B: Sulphuryl chloride

Option C: Suphanyl chloride

Option D: All of the above

Correct Answer: Sulphuryl chloride ✔

Option A: Rayleigh

Option B: Ramsay

Option C: Lockerey

Option D: Dalton

Correct Answer: Ramsay ✔

Option A: O

Option B: 1

Option C: 2

Option D: 3

Correct Answer: 1 ✔

A. H2S2O3
B.H2SO8
C. H2S4O6
D. H2 S2 O6

Submitted by: Muhammad Ali Kunbhar

Correct Answer: B.H2SO8 ✔

Option A: Flurocarbon

Option B: Carbon monoxide

Option C: Methane

Option D: C2H2

Correct Answer: Carbon monoxide ✔

A. Acetone
B. Acetic acid
C. Acetophenone
D. Phenyl acetate

Submitted by: Muhammad Ali Kunbhar

Correct Answer: C. Acetophenone ✔

Option A: 1.65 g/L

Option B: 1.67 g/L

Option C: 1.68 g/L

Option D: None of the above

Correct Answer: 1.68 g/L ✔

Option A: C2H4

Option B: C3H6

Option C: C4H8

Option D: C5H10

Correct Answer: C4H8 ✔

A. 1.8 gram of H₂O
B. 12 moles of KMnO₄
C. 0.6N H₂SO₄
D. 4.6 gram of C₂H₅OH

Submitted by: Muhammad Ali Kunbhar

Correct Answer: B. 12 moles of KMnO₄ ✔

Option A: 5

Option B: 6

Option C: 7

Option D: 8

Correct Answer: 5 ✔

Option A: Distillation

Option B: Extraction

Option C: Gas chromatography

Option D: Column chromatography

Correct Answer: Column chromatography ✔

Option A: Angle strain

Option B: Torsional strain

Option C: Steric strain

Option D: Orbital strain

Correct Answer: Steric strain ✔

Option A: Electrophilic addition

Option B: Electrophilic substitution

Option C: Nucleophilic addition

Option D: Necleophilic substitution

Correct Answer: Nucleophilic addition ✔

Option A: Water

Option B: Hexane

Option C: Dimethylflormamide

Option D: Ethanol

Correct Answer: Dimethylflormamide ✔

Option A: Carbon=0, Oxygen=0

Option B: Carbon= +1, Oxygen= -1

Option C: Carbon= -1, Oxygen= +1

Option D: Carbon=0, Oxygen= -1

Correct Answer: Carbon= -1, Oxygen= +1 ✔

Option A: 0.20 m glucose

Option B: 0.20 m NaCl

Option C: 0.15 m CaCl2

Option D: 0.25 m sucrose

Correct Answer: 0.15 m CaCl2 ✔

Option A: 53.4 grams

Option B: 54.4 grams

Option C: 55.4 grams

Option D: 56.4 grams

Correct Answer: 54.4 grams ✔

Option A: 0.2 moles

Option B: 0.3 moles

Option C: 0.4 moles

Option D: 0.5 moles

Correct Answer: 0.2 moles ✔

Option A: 64.5%

Option B: 65.6%

Option C: 63.5%

Option D: 61.5%

Correct Answer: 63.5% ✔

Option A: 74% Fe

Option B: 75% Fe

Option C: 77% Fe

Option D: 78% Fe

Correct Answer: 78% Fe ✔

Option A: C2H6O

Option B: C6H18O3

Option C: C6H12O6

Option D: C2H5O

Correct Answer: C6H18O3 ✔

A. Greenhouse effect
B. Fire in coal mines
C. Dry farming
D. Monsoon

Submitted by: Muhammad Ali Kunbhar

Correct Answer: A. Greenhouse effect ✔

A. p-electrons in Ne(Z = 10)
B. s-electrons in Mg(Z = 12)
C. d-electrons in Fe(Z = 26)
D. p-electrons in CI(Z = 17)

Submitted by: Muhammad Ali Kunbhar

Correct Answer: D. p-electrons in CI(Z = 17) ✔

A. smelting
B. roasting
C. calcinations
D. froth floatation

Submitted by: Muhammad Ali Kunbhar

Correct Answer: A. smelting ✔

A. H₂ at -73^oC
B. CH₄ at 300 K
C. N₂ at 1,027^oC
D. O₂ at 0^oC

Submitted by: Muhammad Ali Kunbhar

Correct Answer: A. H₂ at -73^oC ✔

A. Dalton’s law
B. Gay Lussac’s law
C. Henry’s law
D. Raoult’s law

Submitted by: Muhammad Ali Kunbhar

Correct Answer: C. Henry’s law ✔

A. H₂CO₃ – HCO₃
B. H₂CO₃ – CO₃^2-
C. CH₃COOH – CH₃COO^–
D. NH₂CONH₂ – NH₂CONH⁺

Submitted by: Muhammad Ali Kunbhar

Correct Answer: A. H₂CO₃ – HCO₃ ✔

A. alcohol
B. carbon dioxide
C. chlorine
D. sodium chlorine

Submitted by: Muhammad Ali Kunbhar

Correct Answer: C. chlorine ✔

A. specific heat
B. thermal capacity
C. water equivalent
D. None of the above

Submitted by: Muhammad Ali Kunbhar

Correct Answer: B. thermal capacity ✔

A. 2.05 gram
B. 3.05 gram
C. 4.05 gram
D. 5.05 gram

Submitted by: Muhammad Ali Kunbhar

Correct Answer: B. 3.05 gram ✔

A. 2-methyl octane
B. n-heptane
C. iso-octane
D. 3-methyl octane

Submitted by: Muhammad Ali Kunbhar

Correct Answer: B. n-heptane ✔

A. this acid, in ancient times, was used to eliminate ant-hills
B. this corrosive acid is secreted by ants to drive away their enemies
C. this acid was first obtained by the distillation of ants
D. ants are attracted by the odour of this acid

Submitted by: Muhammad Ali Kunbhar

Correct Answer: C. this acid was first obtained by the distillation of ants ✔

A. 30 KJ
B. 1 KJ
C. 39 KJ
D. 29 KJ

Submitted by: Muhammad Ali Kunbhar

Correct Answer: C. 39 KJ ✔

Option A: S

Option B: P

Option C: d

Option D: f

Correct Answer: S ✔

Option A: BaSO4

Option B: SrSO4

Option C: CaSO4

Option D: MgSO4

Correct Answer: MgSO4 ✔

Option A: +3

Option B: +2

Option C: +1

Option D: +4

Correct Answer: +3 ✔

Option A: Be

Option B: Cl

Option C: K

Option D: P

Correct Answer: Be ✔

Option A: S-Block

Option B: P-Block

Option C: d-Block

Option D: f-Block

Correct Answer: f-Block ✔

Option A: 1

Option B: 2

Option C: 14

Option D: 18

Correct Answer: 1 ✔

Option A: Lother Meyer

Option B: A.E de Chancourtois

Option C: Newland

Option D: Dobereiner

Correct Answer: A.E de Chancourtois ✔

Option A: Li, Be, B

Option B: F, Cl, Br

Option C: Cl, Br, I

Option D: Na, K, Rb

Correct Answer: Cl, Br, I ✔

Option A: CO2

Option B: CH3CHO

Option C: COC2

Option D: HCN

Correct Answer: CO2 ✔

Option A: H2O

Option B: CH3OH

Option C: Both a and b

Option D: None of the above

Correct Answer: H2O ✔

Option A: CH3Br

Option B: CH3CH2Br

Option C: CH3CH2CH2Br

Option D: (CH3)3CBr

Correct Answer: (CH3)3CBr ✔

Option A: CH4

Option B: CO2

Option C: C2H4

Option D: Xe

Correct Answer: CO2 ✔

Option A: 546 °C

Option B: 546 K

Option C: 200°C

Option D: 273 K

Correct Answer: 546 K ✔

Option A: Double

Option B: Same

Option C: Half

Option D: Four times

Correct Answer: Double ✔

Option A: H2

Option B: CH4

Option C: He

Option D: NH3

Correct Answer: He ✔

Option A: 159.6kJ

Option B: 135.5 KJ

Option C: 110.5 KJ

Option D: 80.4 KJ

Correct Answer: 159.6kJ ✔

Option A: e/m ratio of an electron

Option B: Spin of an electron

Option C: Angular momentum of an electron

Option D: Magnetic momentum of an electron

Correct Answer: Angular momentum of an electron ✔

Option A: Size of orbitals

Option B: Shape of orbitals

Option C: Orientation of orbitals

Option D: All of the above

Correct Answer: Orientation of orbitals ✔

Option A: 2 R

Option B: R/2

Option C: 3R/4

Option D: R/4

Correct Answer: 3R/4 ✔

Option A: 1000 to 300 A°

Option B: 3800 to 7600 A°

Option C: 8000 to 10,000 A°

Option D: 12,000 to 15,000 A°

Correct Answer: 3800 to 7600 A° ✔

Option A: Fe>Co> Ni

Option B: Co > Ni > Fe

Option C: Ni> Co> Fe

Option D: Co >Fe>Ni

Correct Answer: Co > Ni > Fe ✔

Option A: Gold foils

Option B: Barium sulphate

Option C: Zinc sulphide screen

Option D: Thin Aluminium sheet

Correct Answer: Zinc sulphide screen ✔

Option A: 0.115

Option B: 0.900

Option C: 0.015

Option D: 0.215

Correct Answer: 0.115 ✔

Option A: 0

Option B: 7

Option C: 14

Option D: None of above

Correct Answer: 7 ✔

Option A: 7.0

Option B: 7.4

Option C: 7.8

Option D: 8.2

Correct Answer: 7.4 ✔

A. 6.0
B. 6.5
C. 7.0
D.7.5

Submitted by: Muhammad Ali Kunbhar

Milk fresh from the cow typically has a pH between 6.5 and 6.7. The pH of milk changes over time. As milk goes sour, it becomes more acidic and the pH gets lower. This occurs as bacteria in milk convert the sugar lactose into lactic acid

Correct Answer: 6.5 ✔

Option A: 1.3

Option B: 4.0

Option C: 2.886

Option D: 3.886

Correct Answer: 3.886 ✔

Option A: 3.2

Option B: 4.0

Option C: 2.198

Option D: 1.0

Correct Answer: 3.2 ✔

Option A: Tert-Butanol

Option B: 2,2-Dimethyl-propanol

Option C: Tert Alcohol

Option D: 1,1- Diethylethanol

Correct Answer: 2,2-Dimethyl-propanol ✔

A. Methanamide
B. Methanoylamine
C. Aminoethanol
D. Formanide

Submitted by: Muhammad Ali Kunbhar

Correct Answer: . Methanamide ✔

Option A: Epoxy methane

Option B: Oxoethene

Option C: Methoxymethane

Option D: Oxirane

Correct Answer: Oxoethene ✔

Option A: Cyanide

Option B: Isocyanides

Option C: Nitrile

Option D: Carbylamines

Correct Answer: Nitrile ✔

Option A: Depression of freezing point

Option B: Volumetric method

Option C: Victor Meyer’s method

Option D: Osmosis method

Correct Answer: Volumetric method ✔

Option A: Nitrogen gas

Option B: NH3

Option C: CN‾

Option D: NO

Correct Answer: CN‾ ✔

Option A: Cl

Option B: N2

Option C: CO2

Option D: CO

Correct Answer: Cl ✔

Option A: Liquid/liquid

Option B: Solid/liquid

Option C: Liquid/solid

Option D: Liquid/gas

Correct Answer: Solid/liquid ✔

Option A: 1.20A°

Option B: 1.34A°

Option C: 1.54A°

Option D: 1.68A°

Correct Answer: 1.68A° ✔

Option A: 115.5°

Option B: 109.5°

Option C: 105. 7°

Option D: 180°

Correct Answer: 109.5° ✔

Option A: Unsaturations

Option B: Cyclic structure

Option C: Presence of 4nπ electrons

Option D: Presence of 4n+2π electrons

Correct Answer: Presence of 4n+2π electrons ✔

Option A: +I and +R effect

Option B: -1 and +R effect

Option C: +1 and -R effect

Option D: -I and -R effect

Correct Answer: -1 and +R effect ✔

Option A: Phenol

Option B: P-nitrophenol

Option C: O-nitrophenol

Option D: M-nitrophenol

Correct Answer: P-nitrophenol ✔

Option A: Inductive effect

Option B: Resonance effect

Option C: Intermolecular H-bonding

Option D: Isomeric effect

Correct Answer: Intermolecular H-bonding ✔

Option A: CH3CH3

Option B: CH2=CH2

Option C: Benzene

Option D: Cyclohexane

Correct Answer: CH3CH3 ✔

Option A: NaOH

Option B: KOH

Option C: NaCl

Option D: NaBH4

Correct Answer: KOH ✔

Option A: RCOON

Option B: RONa

Option C: RSNa

Option D: ROsO3Na

Correct Answer: RCOON ✔

Option A: Anionic

Option B: Cationic

Option C: Nonionic

Option D: Neutral

Correct Answer: Nonionic ✔

Option A: Cationic detergents

Option B: Anionic detergents

Option C: Non-ionic detergents soap

Option D: All of above

Correct Answer: Non-ionic detergents soap ✔

Option A: Methanol

Option B: Glycol

Option C: Glycerol

Option D: Sodium hydroxide

Correct Answer: Glycerol ✔

Option A: They form complexes

Option B: They show variable valency

Option C: All transition metal compounds are paramagnetic

Option D: They form coloured ions

Correct Answer: All transition metal compounds are paramagnetic ✔

Option A: Small sized metal ions

Option B: Absorption of light in UV region

Option C: Complete ns sub-shell

Option D: Incomplete (n-1) d sub-shell

Correct Answer: Incomplete (n-1) d sub-shell ✔

Option A: +2

Option B: +4

Option C: +5

Option D: +7

Correct Answer: +7 ✔

Option A: AgF

Option B: AgCl

Option C: AgBr

Option D: AgI

Correct Answer: AgF ✔

Option A: Bronze

Option B: Brass

Option C: Gun-metal

Option D: Type metal

Correct Answer: Brass ✔

Option A: Variable oxidation state

Option B: Natural Radioactivity

Option C: Tendency to form complexes

Option D: Formation of alloys

Correct Answer: Natural Radioactivity ✔

Option A: Fe

Option B: Co

Option C: Ni

Option D: Rn

Correct Answer: Co ✔

Option A: Annealing

Option B: Quenching

Option C: Tempering

Option D: Nitriding

Correct Answer: Annealing ✔

Option A: Silicon carbide

Option B: Iron carbide

Option C: Graphite

Option D: Partly as iron carbide and partly as graphite

Correct Answer: Iron carbide ✔

Option A: Fe+Cr+Ni

Option B: Fe+Ni+Cu

Option C: Fe+ Cr+Cu

Option D: Cu+C+Ni

Correct Answer: Fe+Cr+Ni ✔

Option A: Electrchemistry

Option B: Matrix mechanics

Option C: Statistical thermodynamics

Option D: Soectroscopic analysis

Correct Answer: Statistical thermodynamics ✔

Option A: 3P

Option B: P/3

Option C: 3P/T

Option D: 6P

Correct Answer: P/3 ✔