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:
The unit of the rate constant (k) is same as that of rate of reaction________________?
A. Second order reaction
B. First order reaction
C. Zero order reaction
D. Third order reaction
Acid present in acid rain may be_________________?
A. HNO3
B. H2SO4
C. both A and B
D. none of the above
Which of the following elements conduct electricity and also melts below 100°C ?
A. Carbon
B. Sodium
C. Aluminium
D. Sulphur
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?
A. Ethylene chloride
B. Ethylene bromide
C. Ethylene iodide
D. Ethylene fluoride
Isotopes differs in______________________?
A. position in the periodic table
B. arrangement of electrons in orbitals
C. properties depend upon mass
D. chemical properties
The volume occupied by 1.4g CO at S.T.P is___________________?
A. 2.24 dm3
B. 22.4 dm3
C. 1.12 cm3
D. 1.12 dm3
Which of the following set has all species isoelectronic__________________?
A. Li+1 – Na+1 – K+1
B. F – Cl – Br
C. F – Ne – Na+
D. H+ – H- – H
Water absorber used in combustion analysis is___________________?
A. Lime water
B. 50% KOH
C. CaCl2
D. Mg (CIO4)2
The type of filtering media used for filtration depending upon____________________?
A. Nature of crucible
B. Nature of reactants
C. Nature of product
D. Nature of precipitate
A method of separation of components from its solution using Distribution law is ___________________?
A. Sublimation
B. Distillation
C. Solvent extraction
D. Crystallization
Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?
A. sixteen / seventeen
B. one / seventeen
C. one / three
D. two / three
The molecules of CO2 in dry ice form__________________?
A. Covalent crystal
B. Ionic crystal
C. Molecular crystal
D. Any type of crystal
Only London dispersion forces are present among the_________________?
A. Molecules of hydrogen chloride gas
B. Atoms of helium in gaseous state at high temperature
C. Molecules of water in liquid state
D. Molecules of solid iodine
Quantum number values for 3p orbitals are____________________?
A. n=3 l=0
B. n=3 l=2
C. n=3 l=1
D. n=3 l=3
Which specie has unpaired electrons in antibonding molecular orbitals_______________?
A. B2
B. N2-2
C. O2+2
D. O2-2
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
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 10-5 mol dm-3
D. 1.0 x 10-10 mol dm-3
Which of the following solution has the highest boiling point ?
A. 5.85% NaCl Solution
B. 6.0 % urea solution
C. 18.0 % glucose solution
D. All have same boiling point
Which of the following can be used in laptops ?
A. Fuel cell
B. Silver oxide battery
C. Nickel cadmium cell
D. Lead accumulator
Which is the unit of (K) rate constant for zero order reaction ?
A. mol-1 dm3 s-1
B. mol dm-3 s-1
C. s-1
D. mol-2 dm6 s-1
Which is carnalite________________?
A. NaCI
B. KCI
C. KCI MgCl2 6H2O
D. Na2CO3. 10H2O
Which one does not give borax bead test_________________?
A. Barium sulphate
B. Copper sulphate
C. Cobalt sulphate
D. Nickel sulphate
The most reactive allotropic form of phosphorus is________________?
A. White
B. Black
C. Redox potential
D. Violet
Which molecule has the highest bond energy among the halogens_________________?
A. Iodine
B. Chlorine
C. Fluorine
D. Bromine
The most paramagnetic element is____________________?
A. Iron
B. Chromium
C. Cobalt
D. Manganese
Which one of the following looks odd__________________?
A. KMnO4
B. H2SO4
C. H2S
D. K2CrO4
In 1 – pentene -4- yne the carbon exhibit hybridization_________________?
A. sp2 – sp
B. sp3 – sp2
C. sp2 – sp
D. sp3 – sp2 – sp
When benzene is heated in air with V2O5 at 450°C yields_________________?
A. Glyoxal
B. Maleic anhydride
C. Phenol
D. Benzoic acid
Which one of the following will be sulphonated readily ?
A. Nitrobenzene
B. Toluene
C. Chlorobenzene
D. Benzene
When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields______________?
A. Ethanoic acid
B. Carboxylic acid
C. Propanoic acid
D. Butanoic acid
Ethy1 chloride on reduction in the presence of Zn/HCI produces___________________?
A. Ethanol
B. n. butane
C. Ethane
D. Diethy1 ether
For industrial preparation of CH3CHO catalytic promoter is_________________?
A. CuCl2
B. Cu2Cl2
C. PdCl2
D. PbCl2
Which of the following is not a fatty acid ?
A. Acetic acid
B. Propanoic acid
C. Phthalic acid
D. Butanoic acid
Which one of the following fertilizers provides the nitrogen and phosphorus to the plant ?
A. Urea
B. Diammonium phosphate
C. Calcium superphosphate
D. Potassium nitrate
Chlorination of water may be harmful if the water contains_________________?
A. Dissolved oxygen
B. Ammonia
C. Carbon dioxide
D. All
The mass of one mole of electron is________________?
A. 0.184
B. 0.55
C. 1.008
D. 1.637
The number of atoms in a molecule determines________________?
A. macromolecule
B. macromolecule
C. molecularity
D. atomicity
Which element has same isotopes like palladium___________________?
A. Cadmium
B. Calcium
C. Nickel
D. Tin
Chemistry Mcqs
A limiting reactant is one which________________?
A. gives the maximum amount of the product which is required
B. is taken in lesser quantity in volume as compared to other reactants
C. is taken in lesser quantity in grams as compared to other reactants
D. gives the minimum amount of the product under consideration
A safe and more reliable method for drying the crystal is__________________?
A. folds of filter paper
B. Hot air currents
C. oven
D. Vacuum desiccator
A real gas obeying vander waals equation will resemble the ideal gas if_______________________?
A. Both a and b are small
B. a is small and b is large
C. Both a and b are large
D. a is large and b is small
Plasma is used in_________________?
A. Neon signs
B. Fluorescent bulb
C. Lasers
D. All of these
Which of the following is pseudo solid_____________________?
A. NaCl
B. CaF2
C. Glass
D. Diamond
Bohrs model is contradicted by__________________?
A. Dual nature of matter
B. Plancks theory
C. Heisenbergs uncertainty principle
D. All of these
Atomic radius can be determined by_________________?
A. X – ray diffraction
B. Optical microscope
C. Spectrophotometer
D. Electron microscope
For which system does the equilibrium constant Kc has unit of (concentration)-1__________________?
A. H2+I2 2HI
B. N2+3H2 2NH3
C. 2NO2 N2H4
D. PCI5 PCI3+CI2
18g glucose is dissolved in 90g water the relative lowering in vapour pressure is equal to ___________________?
A. 5.1
B. 8
C. 6
D. one/fifty one
Stronger is the oxidizing agent greater is the___________________?
A. e.m.f of cell
B. Redox potential
C. Oxidation potential
D. standard reduction potential
Which is true about Zn-Cu galvanic cell ?
A. Oxidation occurs at cathode
B. K+ ion transfer from salt bridge to left beaker of ZnSO4
C. Reduction occurs at anode
D. Anode is negatively charged
Nitrates of which pair gives different products on thermal decomposition___________________?
A. Mg Ca
B. Na K
C. Li Na
D. Li Ca
Keeping in view the size of atom which is in correct order___________________?
A. Lu > Ce
B. Ba > Mg
C. Mg > Sr
D. CI > 1
Which one is not the use of silicones________________________?
A. Rubber sheet
B. Water repellent film
C. Lubricant
D. Medicine
Chemical composition of cinnabar is____________________?
A. PbS
B. HgS
C. FeS2
D. ZnS
When chlorine is passed through hot solution of caustic soda the reaction is said as___________________?
A. Reduction
B. Displacement
C. Disproportionation reaction
D. Double displacement reaction
In the complex [Cr(OH)3(H2O)3] the coordination number is __________________?
A. 2
B. 4
C. 3
D. 6
A great variety of the organic compounds is due to its property of carbon_________________?
A. Show isomerism
B. Exhibit catenation
C. Show tetravalency
D. Can form multiple bonds
Chemistry Mcqs
Vinyl acetylene combines with hydrochloric acid produces___________________?
A. Ethylidine dichloride
B. Diviny1 acetylene
C. Chloroprene
D. 1 – 3 – 3 – trichloro butane
When toluene reacts with chlorine in sunlight the first major product is__________________?
A. Benzy1 chloride
B. O-chlorotoluene
C. Benzal dichloride
D. O-chlorotoluene and P-chlorotoluene
Which one of the following is not a good leaving group ?
A. Cl-
B. HSO4-
C. OH-
D. Br-
The process of fermentation involves all the enzymes except__________________?
A. Invertase
B. Diastase
C. Zymase
D. Sucrase
Which one does not exhibit aldol condensation___________________?
A. Acetone
B. Ethanal
C. Benzaldehyde
D. Butanone
The common name of propane -1 3-dioic acid is____________________?
A. Succinic acid
B. Oxalic acid
C. Malonic acid
D. Fumaric acid
Industrial materials thermal power stations are coated with__________________?
A. polyamide resins
B. Epoxy paints
C. Polyester resins
D. Polyvinyl chloride
Main source of organic compounds is__________________?
A. Animal
B. Coal
C. Fossil
D. Plants
Hydro carbons which burn with smoky flame are called_________________?
A. Alicyclic
B. Aliphatic
C. Aromatic
D. Aldehyde
Octane number 2 2 4-trimethyl pentane is__________________?
A. 100
B. 80
C. 90
D. 70
Geometric isomerism is usually found in___________________?
A. Alkynes
B. Alkenes
C. Alkanes
D. Esters
Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have________________?
A. Low melting points
B. High boiling points
C. Low vapour pressure
D. High electrical conductivity
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 plants
D. organic compounds can be synthesized by animals
A double bond consists of __________________?
A. Two Pi bonds
B. Two sigma bonds
C. One sigma and one Pi bonds
D. One sigma and two Pi bonds
Chemical properties of first member of homologous series with respect to other members are_________________?
A. same
B. different
C. depends upon number of H atoms
D. depends upon number of C atoms
Compounds having same molecular formula but differ in structural formula are called __________________?
A. monomer
B. polymer
C. isomer
D. allotropes
Organic compounds are soluble in ____________________?
A. alkalies
B. non-polar solvent
C. polar solvent
D. water
Methane is used in power generation in chemical industries being a__________________?
A. good caloric value
B. natural gas
C. cheaper
D. All
The precess in which larger molecule with higher molecular weight breaks down into smaller moleucles with lower molecular weight____________________?
A. isomerism
B. pyrolysis
C. polymerization
D. no such process occurs
The metallic sound produced by engine due to the pre-ignition of fuel is called _______________?
A. knocking
B. cracking
C. reforming
D. a and c
Which of the following can be used as anti-knocking agent ?
A. (C2H5)2 Pb
B. (C2H5)4 Pb
C. PbCl2
D. all of the above
Isomerism which is present only in alkene is__________________?
A. metamerism
B. structural isomerism
C. cis-trans isomerism
D. both b and c
Compound containing benzene ring in their structure are __________________?
A. carboxylic acid
B. aromatic
C. aliphatic
D. carbohydrates
Which of the following is an amide________________?
A. R – NH – R
B. RCONH2
C. R-NH2
D. C6H5NH2
Only sigma bonds are present in__________________?
A. butanoic acid
B. propene
C. butanal
D. ethoxy ethane
The structure of ethyne is_________________?
A. trigonal
B. angular
C. linear
D. trigonal planar
The general formula of cycloalkene is __________________?
A. CnH2n+2
B. CnH2n
C. CnH2n-1
D. CnH2n-2
C5H12 has the number of isomers ___________________?
A. two
B. one
C. three
D. four
Octane number can be improved by________________?
A. Adding (CH3)4 Pb
B. Adding (C2H5)4 Pb
C. Isomerization
D. All
Octane number 2 2 4-trimethyl pentane is________________?
A. 100
B. 80
C. 90
D. 70
Propene can exhibit________________?
A. geometric isomerism
B. cis-trans isomerism
C. both a & b
D. none of the above
Pentane and 2-methyl butance have the same_______________?
A. Melting point
B. Boiling point
C. Percentage composition
D. Structural formula
The first organic compound was synthesized in laboratory by_________________?
A. Wohler
B. Berzilius
C. Kolbe
D. Berthelot
First organic compound synthesized in laboratory was _________________?
A. ethyl alcohol
B. tartaric acid
C. methanol
D. urea
The property of carbon chain formation is called _________________?
A. catenation
B. polymerization
C. hybridization
D. solvation
The organic compounds having very high molecular weight are called _________________?
A. carboxylic acids
B. aldehydes
C. ketones
D. polymers
Rate of reactions of most organic compounds are____________________?
A. very fast
B. very slow
C. slow
D. no regular character present
Coal is produced after a long time decay of_________________?
A. fossils
B. animals
C. wood
D. all of the above
Crude oil is blackish coloured liquid produced after the decay of organic matter present between_________________?
A. mountains
B. earth layer
C. sedimentary rocks
D. rocks
At low temperature and pressure cracking can be done in presence of catalyst________________?
A. Fe2O3
B. Al2O3
C. Al2O3 and SiO2
D. Fe2O3 and SiO2
Which one of the following compounds shows intense knocking ?
A. iso-heptane
B. n-pentane
C. iso-octane
D. n-heptane
Ether functional group can be represented as ____________________?
A. R-CO-R
B. OH
C. R-O-R
D. R-COOH
A single atom or group of atoms which gives characteristic properties to a compound is called_________________?
A. hydrocarbon
B. radical
C. functional group
D. ion
2-propanol and 1-propanol show the isomerism________________?
A. functional group isomerism
B. metamerism
C. geometric isomerism
D. position isomerism