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 …
CHEMISTRY MCQs
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 …
MCQs on Freezing Point of the Solvent Which one of the following gases has the lowest value of Henry’s law constant? N2 He H2 CO2 Answer: (d) If 10ml of 0.1M aqueous solution of NaCl is divided into 1000 drops of equal volume. What will be the concentration of one …
MCQs on Cell Constant and Electrochemical Cells Oxygen has a +2 oxidation state in H2O H2O2 F2O SO2 Answer: (3) Which of the following is the strongest reducing agent? Li Na Mg Ca Answer: (1) When the salt bridge is removed from a cell, its voltage will increase will decrease …
MCQs on Compounds of Transitional Elements The 3d transition series contains elements having an atomic number from 21 to 30 21 to 31 22 to 30 21 to 29 Answer: (a) The first transition element is copper nickel scandium vanadium Answer: (c) Transition metals are generally coloured because they absorb …
MCQs on Water or Hydride of Oxygen Water is oxidised to oxygen by H2O2 KMnO4 ClO2 fluorine Answer: (d) The H-O-H bond angle in a water molecule is about 90o 105o 135o 180o Answer: (b) The action of water or dilute mineral acids on metals can give tritium dihydrogen trihydrogen …
MCQs on Reversible and Irreversible Reaction The net energy change in a reversible cyclic process is 3/2 RT zero always > 0 always < 0 Answer: (b) Which of the following is an extensive property? temperature pressure mass/volume ratio energy Answer: (d) Which of the following represents the largest amount …
MCQs on Law of Mass Action Which of the following is not correct? the rate law is an experimental fact, but the law of mass action is theoretical the rate law is always different from the expression of the law of mass action the rate law is more informative than …
MCQs on Kp And Kc Relationship And Characteristics Of K What will be the value of Kp if the Kc is 26 for a reaction, PCl5 ⇌ PCl3 + Cl2at 25o°? 0.57 0.46 0.83 0.61 Answer: (d) For which of the following reactions Kp is less than Kc? 2HI ⇌ H2 …
MCQs on Electrical Conductors, Arrhenius Theory and Ostwald’s Dilution Law If a conductor length is increased, 100% then keeping all other parameters fixed, what will be the increase in power dissipate? 100% 200% 300% 400% Answer:(b) What happens to the conductivity of semiconductors when there is an increase in temperature? …
MCQs on Hydrogen Ion Concentration pH Scale and Buffer Solution Range of pH scale is 7 to 10 0 to 10 0 to 14 7 to 14 Answer: (c) Level of pH found in antacid solution ≤ 6.5 ≥ 7.0 > 10 > 14 Answer: (b) Three unknown solutions are …
MCQs on 2nd and 3rd Law of Thermodynamics and Entropy Which of the following processes is used to do maximum work done on the ideal gas that is compressed to half of its initial volume? isothermal isochoric isobaric adiabatic Answer: (d) What is the ratio of Cp/Cv for gas if …