Chemistry MCQs

A. Internal structural changes in matter B. Composition of matter C. Properties of matter D. Composition and properties of matter

A. tritium B. deuterium C. protium D. ortho-hydrogen The correct answer to the question: “The radioactive isotope of hydrogen is called___________?” is “tritium”.

A. Michael Faraday B. James Maxwell C. Yuri Gagarin D. J.J Thomson The correct answer to the question: “Electron was discovered by?” is “J.J Thomson”.

A. haber process B. Amonia solvay process C. decons process D. lead chamber process The correct answer to the question: “Sodium carbonate is produced by____________?” is “Amonia solvay process”.

A. Sea water B. Brass C. Tape water D. Graphite E. Sand In chemistry, a substance refers to a matter which has specific composition and specific properties which do not change. A substance can be an element or a compound. A substance typically has a constant composition, which can not be separated by physical methods. … Read more

A. ionic substances B. metallic substances C. molecular solids D. covalent network solids

A. Ice B. Diamond C. Sucrose D. Plastic

A. higher melting point then molecular crystals B. lower melting point then molecular crystals C. discrete molecules linked by Van der waals forces D. hydrogen bonding

A. Paint B. Glass C. Gun Powder D. Cement

A. 0.2m B. 0.2mm C. 0.2nm D. 0.2pm

A. Atomic number B. Relative abundance C. Electronic configuration D. All of the above

A. Relative abundance B. Average mass of element C. Number of isotopes D. Relative isotopic mass

A. CH2 C12 B. CH3C1 C. CC14 D. CHCL3 Chloroform is a colorless, sweet-smelling organic compound with the IUPAC name Trichloromethane and formula CHCl3. Chloroform can daze or knock out people even when it’s consumed in small doses.

A. 1-mole molecules of water B. 1-gram molecule of water C. 3-gram atoms D. all

A. Isotopes with odd atomic number are abundant B. Isotopes with odd atomic number and even mass number are abundant C. Isotopes with even atomic number and even mass number are abundant D. Isotopes with even atomic number and odd mass no are abundant

A. 6.022 x 1023 atoms of oxygen B. 22-gram electrons C. 6.022 x 1023 atms of carbon D. both B. & C.

A. 280 B. 300 C. 154 D. 54

A. formula unit B. empirical formula C. molecular formula D. formula mass

A. 0.18 mole B. 0.27 mole C. 0.24 mole D. 0.09 mole

A. oxygen B. carbon C. tin D. chlorine

A. 2.24 dm3 B. 22.4 dm3 C. 1.12 dm3 D. 112 dm3

A. 0.25 B. 0.5 C. 0.75 D. 1

A. 154 B. 280 C. 86 D. 300

A. 80% B. 30% C. 40% D. 20%

A. Mass of an atom itself is in fraction B. Atomic masses are average masses of isobars C. Atmoic masses are average masses of isotopes proportional to their relative abundance D. Atmoic masses are average masses of isotopes

A. sand B. haemoglobin C. diamond D. maltose

A. different number of protons B. same number of neutrons C. different number of neutrons D. same mass number (nucleon number)

A. lighter B. intermediate C. heavier D. are collected at same time

A. NaCl B. H2O C. CCI4 D. It can be applied to all mentioned above

A. Mass number B. Atomic mass C. Relative abundance D. all of the above

A. 1.6 x 10-27 kg B. 1.6 x 10-24 kg C. 1.6 x 10-26 kg D. 1.6 x 10-28 kg

A. H+ H H- B. Li+ Na+ K+ C. C1- Br- I D. F- Ne Na+

A. High energy electron beam B. ? – particle C. X-rays D. All of the above

A. Same number of neutrons B. Same mass number C. Same physical properties D. Same chemical properties

A. Uni-negative B. Uni-positive C. Di-negative D. Di-positive

A. Gas B. Liquid C. Volatile solid D. All

A. volume of particles B. number of particles C. mass of particles D. All of the above

A. Atomicity B. Shape of molecule C. Both A and B D. Difficult to predict

A. relative atomic mass B. mass number C. atomic weight D. relative isotopic mass

A. arsenic B. uranium C. iodine D. nickel

A. 1.008 mg B. 0.184 mg C. 0.054 mg D. 5.4 mg

A. they possess different mass number B. they possess different physical properties C. they possess same chemical properties D. they possess different position in the periodic table

A. identification of elements B. estimation of amounts of elements C. molar ration of elements D. molar volume of elements

A. Empirical formula B. Molecular mass C. Molecular formula D. Formula mass

A. properties which depend upon mass B. arrangement of electrons in orbitals C. chemical properties D. all of the above

A. Combustion method B. Dumas method C. Kjeldahls method D. All of the above methods are for different purposes

A. neutrons B. protons and electrons C. protons D. protons and neutrons

A. 0.5 B. 1 C. 1.5 D. 2

A. 5 B. 4 C. 3 D. 2

A. pressure B. volume C. moles D. density

A. a solvent B. an anti freezing agent C. a substitute for petrol D. for denaturing of ethyl alcohol

A. 20cm3/min B. 40cm3/min C. 160cm3/min D. 2.5cm3/min

A. molecules become more disordered. B. K.E of the molecules decreases C. intermolecular forces become weaker. D. molecules move more frequently.

A. 12% alcohol B. 90% alcohol C. 95% alcohol D. 100% alcohol

A. Plastic B. Glass C. Rubber D. None of the above

A. 2 B. 3 C. 4 D. 5

A. Polar solvent B. Non polar solvent C. Fused metal D. None

A. Analytical balance B. Guoys balance C. Electrical balance D. Single beam balance

A. they cast shadow B. they possess momentum C. they are negatively charged D. all of the above

A. 0.33 nm B. 0.34 nm C. 0.35 nm D. 0.36 nm

A. 1 B. 2 C. 3 D. 4

A. Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin. B. The electrons in the same atom cannot have the same four quantum numbers C. There is maximum of two electrons is an orbital. D. None

A. Teflon B. asbestos C. saran D. acrylic

A. copper B. ice C. diamond D. graphite

A. Be+2H2O?Be (OH)2+H2 B. Be+H2O?Be (OH)2+H2 C. Be+H2O?[Be (OH)4]+2+H2 D. no reaction

A. VSEPR B. VBT C. MOT D. none of the above

A. whole amount of reactant does not change into product B. chemical equilibrium is established C. a catalyst changes the direction of reaction D. rate of forward reaction decreases as reaction proceeds

A. 1 x 10-1 B. 1 x 10-14 C. 1 x 10-7 D. 1

A. 1.008 x 10-3 B. 5.5 x 10-4 C. 1.84 x 10-4 D. 1.673 x 10-3

A. constitutive property B. additive property C. colligative property D. intrinsic property

A. A B. Ag C. Both D. Neither

A. endothermic B. exothermic C. unpredictable D. same

A. Ag B. A C. Au D. Cu

A. Si B. As C. Te D. None of the above

A. IIIA group B. IVA group C. VA group D. VIA group

A. Pb3 O4 B. 2Pb CO3 – Pb (OH)2 C. Pb Cr O4 – Pb (OH)2 D. Pb2O

A. Quantum structure B. Secondary structure C. Tertiary structure D. Primary structure

A. n2a/v correct for the intermolecular forces. B. nb correct for the volume occupied by gas molecules. C. at high densities the equation reduces to the ideal gas law D. all of the above statements are correct.

A. alkaline aquenous iodine B. aqueous bromine C. Fehling solution D. aqueous NaOH

A. phenol is unsaturated B. 2-bromophenol is insoluble in water C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack D. acid-base reaction

A. 0?C B. 273.16K C. ?273.16 K D. ?273.16?C

A. fats B. resins C. iodine D. all the above

A. Carbon B. Arsenic C. Nitrogen D. Sulphur

A. Enzymes B. Nitrogenous bases C. Carbohydrates D. Lipids

A. Similar physical properties B. Similar chemical properties C. Both A and b D. None

A. Average kinetic energy of molecules B. Vibrational kinetic energy C. Translational kinetic energy D. None of the above

A. aluminium can be recycled B. aluminium has very low density C. aluminium is the most abundant metal in the earth crust D. aluminium is resistant to corrosion by organic acids.

A. 6 B. 4 C. 3 D. 2

A. Fe2O3 B. V2O5 C. SO3 D. Ag2O

A. B B. C C. N D. O

A. CCI4 B. CO2 C. BF3 D. none of the above

A. Kc is constant at given temperature B. Kc is unaffected by change in concentration of reactants or products C. Kc indicates the extent of reaction but not about the rate of reaction. D. All of the above

A. 4.0 x 10-8 B. 3.2 x 10-11 C. 2.0 x 10-8 D. 4.0 x 10-12

A. moles dm-3 B. moles kg-1 C. gram dm-3 D. none

A. dilute and concentrated B. dilute and saturated C. saturated and unsaturated D. saturated and super saturated

A. 6 B. 8 C. 10 D. 4

A. Pd B. Ni C. Sn D. All of the above

A. First order reaction B. Second order reaction C. Zero order reaction D. Third order reaction

A. H2SO4 B. HNO3 C. both A and B D. none of the above

A. Aluminium B. Sodium C. Carbon D. Sulphur