Chemistry Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests
“ Chemistry Mcqs “. Tab this page to check “Latest Chemistry MCQs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others. The most occurred mcqs of Chemistry in past papers. Past papers of Chemistry mcqs. Past papers of Chemistry MCQs. Chemistry Mcqs are the necessary part of any competitive / job related exams. The Chemistry mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Chemistry mcqs. The Important series of Chemistry Mcqs are given below:
Presence of nitrogen in organic compounds is tested as__________?
A. NH3
B. Nitrogen gas
C. CN‾
D. NO
The molar mass of an organic acids is determined by____________?
A. Victor Meyer’s method
B. Volumetric method
C. Depression of freezing point
D. Osmosis method
The IUPAC suffix used for _______ NC group?
A. Isocyanides
B. Cyanide
C. Nitrile
D. Carbylamines
The IUPAC name of ethylene oxide is__________?
A. Methoxymethane
B. Oxoethene
C. Epoxy methane
D. Oxirane
The IUPAC name of HCONH2 is___________?
A. Methanamide
B. Aminoethanol
C. Methanoylamine
D. Formanide
The compound (CH3)3COH according to IUPAC is known as ___________?
A. Tert Alcohol
B. 2,2-Dimethyl-propanol
C. Tert-Butanol
D. 1,1- Diethylethanol
The PH of the 0.0032 M H2SO4 is__________?
A. 3.2
B. 2.198
C. 4.0
D. 1.0
The PH of the 1.3 × 10-4 NH4Cl is__________?
A. 4.0
B. 1.3
C. 2.886
D. 3.886
The PH of milk is __________?
A. 7.0
B. 6.5
C. 6.0
D.7.5
The PH of Tears is __________?
A. 7.8
B. 7.4
C. 7.0
D. 8.2
The PH of pure water at 25°C, kw=1×10-4____________?
A. 14
B. 7
C. 0
D. None of above
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. 0.015
C. 0.900
D. 0.215
Alpha particles can be detected by using___________?
A. Barium sulphate
B. Gold foils
C. Zinc sulphide screen
D. Thin Aluminium sheet
Which one of the following is the correct sequence according to atomic weights?
A. Ni> Co> Fe
B. Co > Ni > Fe
C. Fe>Co> Ni
D. Co >Fe>Ni
Generally the limit of visible spectrum is__________?
A. 8000 to 10,000 A°
B. 3800 to 7600 A°
C. 1000 to 300 A°
D. 12,000 to 15,000 A°
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________?
A. R/2
B. 2 R
C. 3R/4
D. R/4
Magnetic quantum number specifies___________?
A. Shape of orbitals
B. Size of orbitals
C. Orientation of orbitals
D. All of the above
Azimuthal quantum number defines___________?
A. Spin of an electron
B. e/m ratio of an electron
C. Angular momentum of an electron
D. Magnetic momentum of an electron
The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
A. 159.6kJ
B. 110.5 KJ
C. 135.5 KJ
D. 80.4 KJ
Which of the following gases shows more ideal behaviour at 0°C___________?
A. CH4
B. H2
C. He
D. NH3
In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?
A. Double
B. Half
C. Same
D. Four times
Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C?
A. 200°C
B. 546 K
C. 546 °C
D. 273 K
The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
A. C2H4
B. CO2
C. CH4
D. Xe
Which of the following haloalkane is hydrolysed by SN1 mechanism?
A. CH3CH2Br
B. CH3Br
C. CH3CH2CH2Br
D. (CH3)3CBr
Hydrocarbon is formed when Grignard reagent is treated with___________?
A. CH3OH
B. H2O
C. Both a and b
D. None of the above
Grignard reagent gives carboxylic acid with____________?
A. CO2
B. COC2
C. CH3CHO
D. HCN
The law of traids is applicable to__________?
A. F, Cl, Br
B. Li, Be, B
C. Cl, Br, I
D. Na, K, Rb
The concept of telluric helix was developed by___________?
A. Newland
B. A.E de Chancourtois
C. Lother Meyer
D. Dobereiner
Which group contains elements that exist as monoatomic molecule?
A. 2
B. 1
C. 14
D. 18
The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
A. S-Block
B. d-Block
C. P-Block
D. f-Block
Which one of the following is a bridge element?
A. Be
B. K
C. Cl
D. P
The common oxidation state of lanthanides is_________?
A. +3
B. +1
C. +2
D. +4
Which of the following is most soluble on water?
A. SrSO4
B. BaSO4
C. CaSO4
D. MgSO4
Which of the following orbitals has maximum penetration effect?
A. S
B. d
C. P
D. f
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
A. ants are attracted by the odour of this acid
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. this acid, in ancient times, was used to eliminate ant-hills
The heat energy produced when the human body metabolises 1 gram of fat is__________?
A. 1 KJ
B. 30 KJ
C. 39 KJ
D. 29 KJ
Which of the following phenomenon is considered responsible for Global Warming?
A. Greenhouse effect
B. Dry farming
C. Fire in coal mines
D. Monsoon
Chemistry Mcqs
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
A. s-electrons in Mg(Z = 12)
B. p-electrons in Ne(Z = 10)
C. d-electrons in Fe(Z = 26)
D. p-electrons in CI(Z = 17)
The metallurgical process in which a metal is obtained in a fused state is called__________?
A. smelting
B. calcinations
C. roasting
D. froth floatation
The molecules of which gas have highest speed?
A. H2 at -73oC
B. N2 at 1,027oC
C. CH4 at 300 K
D. O2 at 0oC
The heat energy produced when the human body metabolises 1 gram of fat is__________?
A. 1 KJ
B. 30 KJ
C. 39 KJ
D. 29 KJ
Which of the following phenomenon is considered responsible for Global Warming?
A. Greenhouse effect
B. Dry farming
C. Fire in coal mines
D. Monsoon
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
A. s-electrons in Mg(Z = 12)
B. p-electrons in Ne(Z = 10)
C. d-electrons in Fe(Z = 26)
D. p-electrons in CI(Z = 17)
Presence of nitrogen in organic compounds is tested as__________?
A. NH3
B. Nitrogen gas
C. CN‾
D. NO
The molar mass of an organic acids is determined by____________?
A. Victor Meyer’s method
B. Volumetric method
C. Depression of freezing point
D. Osmosis method
The IUPAC suffix used for _______ NC group?
A. Isocyanides
B. Cyanide
C. Nitrile
D. Carbylamines
The IUPAC name of ethylene oxide is__________?
A. Methoxymethane
B. Oxoethene
C. Epoxy methane
D. Oxirane
The IUPAC name of HCONH2 is___________?
A. Methanamide
B. Aminoethanol
C. Methanoylamine
D. Formanide
The compound (CH3)3COH according to IUPAC is known as ___________?
A. Tert Alcohol
B. 2,2-Dimethyl-propanol
C. Tert-Butanol
D. 1,1- Diethylethanol
The PH of the 0.0032 M H2SO4 is__________?
A. 3.2
B. 2.198
C. 4.0
D. 1.0
The PH of the 1.3 × 10-4 NH4Cl is__________?
A. 4.0
B. 1.3
C. 2.886
D. 3.886
The PH of milk is __________?
A. 7.0
B. 6.5
C. 6.0
D.7.5
The PH of Tears is __________?
A. 7.8
B. 7.4
C. 7.0
D. 8.2
The PH of pure water at 25°C, kw=1×10-4____________?
A. 14
B. 7
C. 0
D. None of above
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. 0.015
C. 0.900
D. 0.215
Alpha particles can be detected by using___________?
A. Barium sulphate
B. Gold foils
C. Zinc sulphide screen
D. Thin Aluminium sheet
Which one of the following is the correct sequence according to atomic weights?
A. Ni> Co> Fe
B. Co > Ni > Fe
C. Fe>Co> Ni
D. Co >Fe>Ni
Generally the limit of visible spectrum is__________?
A. 8000 to 10,000 A°
B. 3800 to 7600 A°
C. 1000 to 300 A°
D. 12,000 to 15,000 A°
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________?
A. R/2
B. 2 R
C. 3R/4
D. R/4
Magnetic quantum number specifies___________?
A. Shape of orbitals
B. Size of orbitals
C. Orientation of orbitals
D. All of the above
Azimuthal quantum number defines___________?
A. Spin of an electron
B. e/m ratio of an electron
C. Angular momentum of an electron
D. Magnetic momentum of an electron
The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
A. 159.6kJ
B. 110.5 KJ
C. 135.5 KJ
D. 80.4 KJ
Which of the following gases shows more ideal behaviour at 0°C___________?
A. CH4
B. H2
C. He
D. NH3
In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?
A. Double
B. Half
C. Same
D. Four times
Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C?
A. 200°C
B. 546 K
C. 546 °C
D. 273 K
The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
A. C2H4
B. CO2
C. CH4
D. Xe
Which of the following haloalkane is hydrolysed by SN1 mechanism?
A. CH3CH2Br
B. CH3Br
C. CH3CH2CH2Br
D. (CH3)3CBr
Hydrocarbon is formed when Grignard reagent is treated with___________?
A. CH3OH
B. H2O
C. Both a and b
D. None of the above
Grignard reagent gives carboxylic acid with____________?
A. CO2
B. COC2
C. CH3CHO
D. HCN
The law of traids is applicable to__________?
A. F, Cl, Br
B. Li, Be, B
C. Cl, Br, I
D. Na, K, Rb
The concept of telluric helix was developed by___________?
A. Newland
B. A.E de Chancourtois
C. Lother Meyer
D. Dobereiner
Which group contains elements that exist as monoatomic molecule?
A. 2
B. 1
C. 14
D. 18
The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
A. S-Block
B. d-Block
C. P-Block
D. f-Block
Which one of the following is a bridge element?
A. Be
B. K
C. Cl
D. P
The common oxidation state of lanthanides is_________?
A. +3
B. +1
C. +2
D. +4
Which of the following is most soluble on water?
A. SrSO4
B. BaSO4
C. CaSO4
D. MgSO4
Which of the following orbitals has maximum penetration effect?
A. S
B. d
C. P
D. f
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
A. ants are attracted by the odour of this acid
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. this acid, in ancient times, was used to eliminate ant-hills
The heat energy produced when the human body metabolises 1 gram of fat is__________?
A. 1 KJ
B. 30 KJ
C. 39 KJ
D. 29 KJ
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
A. s-electrons in Mg(Z = 12)
B. p-electrons in Ne(Z = 10)
C. d-electrons in Fe(Z = 26)
D. p-electrons in CI(Z = 17)
The metallurgical process in which a metal is obtained in a fused state is called__________?
A. smelting
B. calcinations
C. roasting
D. froth floatation
The molecules of which gas have highest speed?
A. H2 at -73oC
B. N2 at 1,027oC
C. CH4 at 300 K
D. O2 at 0oC
The heat energy produced when the human body metabolises 1 gram of fat is__________?
A. 1 KJ
B. 30 KJ
C. 39 KJ
D. 29 KJ
Which of the following phenomenon is considered responsible for Global Warming?
A. Greenhouse effect
B. Dry farming
C. Fire in coal mines
D. Monsoon
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________?
A. Gay Lussac’s law
B. Dalton’s law
C. Henry’s law
D. Raoult’s law
Which of the following solvents would best facilitate an SN2 substitution reaction?
A. Hexane
B. Water
C. Dimethylflormamide
D. Ethanol
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
A. Carbon= +1, Oxygen= -1
B. Carbon=0, Oxygen=0
C. Carbon= -1, Oxygen= +1
D. Carbon=0, Oxygen= -1
Which of the following aqueous solutions would have the highest boiling point?
A. 0.20 m NaCl
B. 0.20 m glucose
C. 0.15 m CaCl2
D. 0.25 m sucrose
The mass of 3.2 moles of ammonia (NH3) gas?
A. 55.4 grams
B. 54.4 grams
C. 53.4 grams
D. 56.4 grams
The relatively high energy of the gauche conformation of butane is primarily associated with_________?
A. Torsional strain
B. Angle strain
C. Steric strain
D. Orbital strain
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
A. Electrophilic substitution
B. Electrophilic addition
C. Nucleophilic addition
D. Necleophilic substitution
Which of the following solvents would best facilitate an SN2 substitution reaction?
A. Hexane
B. Water
C. Dimethylflormamide
D. Ethanol
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
A. Carbon= +1, Oxygen= -1
B. Carbon=0, Oxygen=0
C. Carbon= -1, Oxygen= +1
D. Carbon=0, Oxygen= -1
Which of the following aqueous solutions would have the highest boiling point?
A. 0.20 m NaCl
B. 0.20 m glucose
C. 0.15 m CaCl2
D. 0.25 m sucrose
The mass of 3.2 moles of ammonia (NH3) gas?
A. 55.4 grams
B. 54.4 grams
C. 53.4 grams
D. 56.4 grams
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
A. 0.2 moles
B. 0.4 moles
C. 0.3 moles
D. 0.5 moles
What is the mass percent of silver in silver notrate, AgNO3?
A. 65.6%
B. 64.5%
C. 63.5%
D. 61.5%
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
A. 75% Fe
B. 74% Fe
C. 77% Fe
D. 78% Fe
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
A. C6H12O6
B. C6H18O3
C. C2H6O
D. C2H5O
What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm?
A. 1.67 g/L
B. 1.65 g/L
C. 1.68 g/L
D. None of the above
The formula C6H5-CO-CH3 represents_______ ?
A. Acetic acid
B. Acetone
C. Acetophenone
D. Phenyl acetate
Poisonous gas present in the exhaust fumes of a jet plane is__________?
A. Methane
B. Carbon monoxide
C. Flurocarbon
D. C2H2
The O-O linkage is present in__________?
A. H2S4O6
B. H2SO8
C. H2S2O3
D. H2 S2 O6
The number of lone pairs in XeOF4 is_________?
A. 2
B. 1
C. O
D. 3
Argon gas was discovered by_______?
A. Lockerey
B. Ramsay
C. Rayleigh
D. Dalton
SO2 reacts with Cl in sunlight to form__________?
A. Suphanyl chloride
B. Sulphuryl chloride
C. Sulphur dioxide
D. All of the above
Oxidation state +1 for phosphorous is found in___________?
A. H3PO4
B. H3PO3
C. H3PO2
D. H2P2O7
Electric bulb filament is made of__________?
A. Aluminum
B. Copper
C. Lead
D. Tungsten
Tetraethyl lead is used as______?
A. Fire Extinguisher
B. Pain Killer
C. Mosquito Repellent
D. Petrol Additive
The average salinity of sea water is________?
A. 2%
B. 3.5%
C. 2.5%
D. 3%
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?
A. Fluorine
B. Bromine
C. Chlorine
D. Sulphur
Marsh gas is_______?
A. Ethane
B. Nitrogen
C. Methane
D. Hydrogen
Potassium Permanganate is used for purifying drinking water, because_________?
A. It is a reducing agent.
B. It dissolves the impurities of water.
C. It is a sterilising agent.
D. It is an oxidising agent.
Find the PH of a 0.001 M solution of Nitric acid HNO3?
A. 4
B. 3
C. 2
D. 5
Which set of quantum numbers is not allowed?
A. n=2,l=1,m1=-1,ms=+1/2
B. n=2,l=1,m1=0,ms=+1/2
C. n=2,l=0,m1=0,ms=-1/2
D. n=2,l=2,m1=1,ms=-1/2
The purpose of Smelting an ore is to________?
A. Reduce it
B. Obtain an alloy
C. Oxidize it
D. Separate volatile impurities
Which Oxide of Manganese is amphoteric?
A. MnO2
B. Mn2O7
C. Mn2O3
D. MnO
A process used for the Concentration of Ore is________?
A. Electrolysis
B. Forth flotation
C. Roasting
D. Distillation
Which metal is used as a reducing agent in Smelting______?
A. C
B. Al
C. Zn
D. Cu
A. s-electrons in Mg(Z = 12)
B. p-electrons in Ne(Z = 10)
C. d-electrons in Fe(Z = 26)
D. p-electrons in CI(Z = 17)