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 …
MCQs on Coordination Compounds When 0.1 mol CoCl3(NH3)5 is combined with excess AgNO3, then 0.2 mol AgCl is obtained. The conductivity of the solution suits the 1:3 electrolyte 1:1 electrolyte 3:1 electrolyte 1:2 electrolyte Answer: (d) A chelating agent has two or more than two donor atoms to bind to …
MCQs on General principles and Processes of Isolation of Elements In the equation, 4M + 8CN– + H2O + O2 → 4[M(CN)2]– + 4OH–, the metal M is copper iron gold Zinc Answer: (c) Heating ore with carbon in the absence of air is known as: reduction carbon-reduction smelting Roasting …
MCQs on Hydrogen Bonding Which one of the following is not an isotope of hydrogen? Deuterium Tritium Ortho hydrogen None of these Answer: (c) Out of the two allotropic forms of dihydrogen, the form with lesser molecular energy is ortho meta para All have the same energy Answer: (c) Non-stoichiometric …
MCQs on Polymers Nylon threads are made of polyester polymer polyamide polymer polyethylene polymer polyvinyl polymer Answer: (b) Which of the following is a branched polymer? low density polymer polyester high density polymer nylon Answer: (a) On the basis of mode of formation polymers can be classified: as addition polymers …
MCQs on Bond Energy Which bond is most polar? N-F C-O O-F C-F Answer: (d) On the basis of octet rule, which bond is not present in gaseous nitrogen pentoxide molecule? covalent bonds coordinate bond electrovalent bond both electrovalent and coordinate bonds Answer: (c) Back pi donation exist in NF3 …
MCQs on Oxidation Reduction The total of the oxidation number in an element is charge volatility reduction oxidation Answer: (a) The reduction is a gain of electrons protons neutros oxygen Answer: (a) Which of the following is not a reducing agent? CO2 SO2 NO2 ClO2 Answer: (a) A number which …
MCQs on Oxidation Number and Oxidation State Number of moles of K2Cr2O7 reduced by 1 mole of Sn2+ is 1/6 1/3 2/3 1 Answer: (b) The oxidation number of carbon in CH2Cl2 is 0 2 3 5 Answer: (a) Which of the following will not be oxidised by O3? KI …
MCQs on Auto Oxidation and Disproportionation Which one of the following will not reduce an acidified solution of potassium dichromate (VI)? (CH3)2C(OH)CH3 FeSO4 CH3CH2CH(OH)CH3 Zn Answer: (a) 25.4g of iodine and 14.2g of chlorine is made to react completely to yield a mixture of ICl and ICl3. Calculate the ratio …
MCQs on Covalent Bonding The octet rule is not valid for the molecule CO2 H2O O2 CO Answer: (d) The nature of bonding in CCl4 and CaH2 is electrovalent in both CCl4 and CaH2 covalent in CCl4 and electrovalent in CaH2 electrovalent in CCl4 and covalent in CaH2 covalent in …
MCQs on Dipole Moment Molecules with odd electron bond are paramagnetic unstable forms dimers at low temperature all are correct Answer: (d) In a crystal, atoms are located at the positions of maximum potential energy minimum potential energy zero potential energy indefinite potential energy Answer: (b) If the water molecule …
MCQs on Overlapping and Bonds Which of the following at ordinary temperature and pressure exists as a linear polymer due to extensive hydrogen bonding? H2O HCl HF NH3 Answer: (c) The shape of SF3Cl3 molecule is triangle bi-pyramidal cubic octahedral tetrahedral Answer: (c) The structure of CH2=C=H2 is linear planar …