MCQs on Decomposition Reaction CO2 obtained by the complete decomposition of 20 g CaCO3 at STP is (a) 4.48 l (b) 2.24 l (c) 44.8 l (d) 48.4 l Answer: (a) Decomposition of hydrogen peroxide to give H2O + O2 is an example of (a) reduction (b) oxidation (c) both …
CHEMISTRY MCQs
MCQs on Titration Which of the following is used as an indicator in the titration of iodine with hypo? (a) Methyl red (b) Methyl orange (c) Starch (d) Potassium ferricyanide Answer: (c) What will be the pH at the equivalence point in the titration of a weak acid and a …
MCQs on Atmosphere The term biosphere refers to (a) Rocks and minerals (b) Plants and animals (c) Water sources (d) Atmosphere and lithosphere Answer: (b) The boundary between troposphere and stratosphere is known as (a) tropopause (b) ionopause (c) stratopause (d) mesopause Answer: (a) Ozone hole is (a) increase in …
MCQs on Glucose ????-D(+)-Glucose has how many asymmetric carbons? (a) 4 (b) 3 (c) 6 (d) 5 Answer: (a) In the process of glycolysis (a) glucose is converted to haem (b) glucose is oxidised to pyruvate (c) pyruvate is converted to citrate (d) glucose is oxidised to glutamate Answer: (b) …
MCQs on Fuel Cell Which of the following converts energy from the combustion of fuel directly to the electrical energy? (a) Ni-Cd cell (b) Dynamo (c) Fuel cell (d) Electrolytic cell Answer: (c) Which of the following is continuously replaced in a fuel cell? (a) Oxidiser (b) Fuel (c) Both …
MCQs on Chlorine Gas Which among the following is the strongest oxidising agent? (a) F2 (b) I2 (c) Br2 (d) Cl2 Answer: (a) Calcium chlorite has the molecular formula (a) Ca(ClO4)2 (b) Ca(ClO3)2 (c) CaClO2 (d) Ca(ClO2)2 Answer: (d) Four lone pairs of electrons are present in (a) O (b) …
MCQs on Quantum Numbers Which of the following quantum numbers can distinguish between two electrons present in the same orbital? (a) Azimuthal quantum number (b) Principal quantum number (c) Magnetic quantum number (d) Spin quantum number Answer: (d) How many orbitals can have the following quantum numbers, n = 3, …
MCQs on Entropy For spontaneous adsorption of gas (a) ΔS is negative so ΔH should be highly positive (b) ΔS is negative so ΔH should be highly negative (c) ΔS is positive so ΔH should also be highly positive (d) ΔS is positive so ΔH should be negative Answer: (b) …
MCQs on Aromaticity Which of the following compounds is not aromatic? 2. Which of the following is not a characteristic property of arenes? (a) Delocalisation of ????-electrons (b) Resonance (c) Greater stability (d) Electrophilic additions Which of the following statements is true for benzene? (a) Benzene easily undergoes …
MCQs on Benzene and its Derivatives This can be a halide in the Friedel Crafts reaction (a) isopropyl chloride (b) chlorobenzene (c) bromobenzene (d) chloroethene Which of the following will not easily undergo Friedel Crafts reaction? (a) Xylene (b) Nitrobenzene (c) Cumene (d) Toluene When phenyl methyl ether reacts with …
MCQs on VSEPR Theory Which of the following species has 120° bond angles? (a) NCl3 (b) PH3 (c) ClF3 (d) BCl3 Which of the following species has a trigonal planar shape? (a) NO3– (b) CO2 (c) N3 (d) NO2– Which of the following has a linear shape? (a) NO2– (b) …
MCQs on Hydrocarbons Choose the process by which liquid hydrocarbons can be converted to gaseous hydrocarbons (a) hydrolysis (b) oxidation (c) cracking (d) distillation under reduced pressure Answer: (c) Which one of the following halide can be used in the Friedel-Crafts reaction? (a) Isopropyl chloride (b) Bromobenzene (c) Chlorobenzene (d) …
MCQs on Structure of Atom How many orbitals can have the following set of quantum numbers, n = 3, l = 1, m1 = 0 ? (a) 3 (b) 1 (c) 4 (d) 2 Answer: (b) Electronic configuration of the outer shell of the element Gd with atomic number 64 is …
MCQs on s-Block Elements Which of the compounds is known as Slaked lime? (a) CaO (b) CaSO4 (c) Ca(OH)2 (d) CaCO3 Answer: (c) Which of the ions have maximum hydration energy? (a) Sr2+ (b) Ca2+ (c) Mg2+ (d) Be2+ Answer: (d) As compared to K, Na has (a) higher ionization …
MCQs on Thermodynamics What will be the value of ΔH, if the forward and reverse reactions have the same energy of activation? (a) ΔH = ΔG = ΔS = 0 (b) ΔS = 0 (c) ΔG = 0 (d) ΔH = 0 Answer: (d) Find out the relationship between x, …
MCQs on Redox Reaction Which of the compounds can exist together? (a) HgCl2, SnCl2 (b) FeCl3, KI (c) FeCl3, SnCl2 (d) FeCl2, SnCl2 Answer: (d) One mole of ferrous oxalate requires____ moles of MnO4– to get oxidised completely in an acidic medium (a) 0.6 moles (b) 0.4 moles (c) 0.2 …
MCQs on p-Block Elements Find the amphoteric oxide (a) CaO2 (b) CO2 (c) SnO2 (d) SiO2 Answer: (c) Graphite has a structural similarity with (a) B2H6 (b) B4C (c) B (d) BN Answer: (d) Which is the correct order of decreasing acidity of lewis acids? (a) BBr3 > BCl3 > …
MCQs on Chemical Kinetics The rate of a chemical reaction tells us about the reactants taking part in the reaction the products formed in the reaction how slow or fast the reaction is taking place none of the above Answer: (c) In the rate equation, when the concentration of reactants …
MCQs on Electrochemistry The aqueous solution of which of the following compounds is the best conductor of electric current? Acetic acid, Hydrochloric acid Ammonia Fructose Answer: (b) An increase in the conductivity equivalent of a solid electrolyte with dilution is primarily due to increased ionic mobility of ions 100 percent …
MCQs on Solid State How many unit cells are divided equally in a face-centred cubic lattice? 2 4 6 8 Answer: (c) A crystalline solid: changes abruptly from solid to liquid when heated. has no definite melting point. undergoes deformation of its geometry easily has irregular 3-dimensional arrangements. Answer: (a) …
MCQ on Alcohols, Phenols and Ethers Benzenediazonium chloride on reaction with phenol in weakly basic medium gives diphenyl ether p-hydroxyazobenzene chlorobenzene Benzene Answer: (b) Phenol reacts with bromine in CS2 at low temperature to give m-bromophenol o-and p-bromophenol p-bromophenol 2,4,6-tribromophenol Answer: (b) When phenol is treated with excess bromine water …