Results HD Quiz powered by harmonic design #1. Number of moles in an element is directly proportional to: Empirical formula mass Molar mass of an element Formula mass Mass of an element #2. Which of the following is NOT a property of transition elements? Good conductors of electricity Hard metals High melting points Ions and compounds are colorless #3. The real gases show deviation from ideal behavior at: Low temperature and High pressure High temperature and High pressure Low temperature and Low pressure High temperature and Low pressure #4. Alkyl halides involving -C-X bond breakage and -C-Nu bond formation simultaneously would follow which one of the following mechanisms E2 SN1 SN2 E1 #5. In order to boil water at 110oC the external pressure should be: 200-760 torr 660-700 torr 760-1200 torr 665-700 torr #6. Which of the following is correct regarding phenol Phenol and water are equally acidic Phenol is less acidic than ethanol Phenol is less acidic than carboxylic acid Phenol is less acidic than water #7. Which of the following is NOT a correct feature of electrolytic cells? Electrochemical reaction takes place Reduction occurs at cathode Oxidation occurs at anode AC source is connected to electrodes #8. Which one of the following is NOT basic in nature Sodium oxide Potassium oxide Aluminum oxide Magnesium oxide #9. Which of the following has a co-ordinate bond? H2O NaCl CaO NH3BF3 #10. CnH2nO is the general formula of Ether Carbolic acid Carboxylic acid Ketones #11. The solubility of sulphates of alkaline metals generally Doesn't change down the group Increase down the group Decrease down the group Increase then decrease down the group #12. Homocyclic organic compounds are sub-divided into two types namely: Saturated and Unsaturated Aromatic and Non aromatic Alicyclic and Aromatic Alkenes and Alkynes #13. Which of the following alcohol can give Iodoform reaction? 1-Butanol 1-Propanol Ethanol Methanol #14. The difference of lithium from the other alkali metals is mainly because of Large radius and high charge density Small radius and low charge density Large radius and low charge density Small radius and high charge density #15. Iso-Butene and 2-Butene are showing which type of isomerism? Metamerism Position Functional group Chain #16. Intermolecular forces between molecules of ideal gas are: Moderate Weal Absent Strong #17. Which of the following DO NOT have tendency to form hydrogen bonding? Ammonia Carboxylic acid Hydrocarbon Ethyl alcohol #18. Electronic configuration of Chromium (Proton number 24) is: [Ar] 3d4 4s2 [Ar] 3d6 4s2 [Ar] 3d5 4s2 [Ar] 3d5 4s1 #19. When carboxylic acid is heated with alcohol in the presence of sulphuric acid, which one of the following is formed: Acyl chloride Amides Acid anhydride Esters #20. Boiling point of a liquid is a temperature at which: Viscosity is less than the atmospheric pressure Surface tension is greater than the atmospheric pressure Viscosity equals the atmospheric pressure Vapor pressure equals the atmospheric pressure #21. In Friedel Craft acylation an acyl group is introduced in benzene ring in the presence of catalyst: AlCl3 Sunlight H2SO4 V2O5 #22. Which of the following is NOT a feature of VSEPR theory? It determines the shape of molecule Only lone pair participates in determining geometry of molecules It helps in understanding interaction of medicinal drug Pairs of electrons repel each other #23. Identify the correct formula to calculate rate of reaction: Change in concentration / Time taken for the change (Time taken for the change / Change in concentration of substance) x 100 Time taken for the change x Change in concentration of substance Time taken for the change / Change in concentration of substance #24. Which of the following is an example of substituent group which release electrons to benzene ring: -CN -NR3+ -NO2 -NH2 #25. The principle, that states that if a stress is applied to a system at equilibrium the system nullify the effect of stress as far as possible is: Le-Chateliers Charles' Haber's Boyle's #26. Identify the correct ascending order of reactivity of alkyl halides Cl, Br, I, F I, F, Cl, Br Br, I, F, Cl F, Cl, Br, I #27. All of the following steps are used to calculate the lattice energy in Born-Haber cycle EXCEPT Ionizing the metal Atomizing the metal Deionize the metal Ionize non-metal #28. Which of the following is CORRECT Arrhenius equation? K = Ae -Ea/UT K = Ae -Ea/ST K = Ae -Ea/QT K = Ae -Ea/RT #29. In graphite the carbon atoms are arranged in which of the following structure? Tetragonal Hexagonal Rhombic Trigonal #30. Which one of the following is not an amino acid Glycine Folic acid Glutamic acid Lysine #31. Reaction of HCN with formaldehyde is a Electrophilic substitution reaction Nucleophilic addition reaction Electrophilic addition reaction Nucleophilic substitution reaction #32. Which step is irrelevant with respect to balancing of redox equations by oxidation Assign oxidation number to all the atoms involved in the equation Split the reaction into two half reactions Equalize the number of electrons lost and gained Identify the element undergoing a change in oxidation number #33. In endothermic reaction, the head content of the Products is more than that of reactants Reactants and products will not change Reactants is more than that of products Reactants and products is equal #34. Which of the following is the correct electronic configuration for carbon? 1s22s22p2 1s22s22p3 1s22s22p1 1s22s22p4 #35. Which of the following has smallest atomic radius P S Na Mg #36. Which of the following is NOT an alloy Steel Graphite Brass Bronze #37. The enthalpy change when 1 mole of water is formed by the reaction of acid with an alkali under standard condition is known as: Enthalpy of formation Enthalpy of neutralization Enthalpy of combustion Enthalpy of reaction #38. One of the following is NOT an example of amorphous solids Glass Glucose Rubber Plastic #39. Identify the correct statement related to substitution and elimination of alkyl halides: Role of leaving groups in elimination is similar to substitution Substitution is favored more than elimination by decreasing solvent polarity Strong bases causes substitution in prefrence to elimination Decrease in temperature will favor elimination more than substitution #40. Identify the CORRECT option required for the maximum yield of ammonia by Haber’s process: High pressure high temperature continual removal of ammonia High pressure low temperature continual removal of ammonia Low pressure low temperature continual removal of ammonia High pressure low temperature continual removal of ammonia #41. The correct ideal gas equation is: qV = nRt gV = nRt PV = nRt yV = nRt #42. Common name of 2-hydroxy propanoic acid is: Lactic acid Tartaric acid Phthalic acid Formic acid #43. The blue color of Fehling’s solution is changed to red when warmed with an aldehyde due to formation of which of the following? Cu2O NO2 SO2 AgO #44. The p-orbital has lobes? 2 3 4 5 #45. Oxidation number of ‘Mn’ in KMnO4 is +1 +7 0 -7 #46. If a reaction rate does not change with concentration then it is 2nd order Zero order 3rd order 1st order #47. The individual atom in the sample of 1 mole of Neon has mass of 20.18 amu because it is It is molar mass of Ne It is a fractional mass Overall mass of an isobar Average atomic mass of Ne #48. Whenever the crystalline solids are broken they do so along definite planes knows as: Coronal planes Sagittal planes Cleavage planes Refractory planes #49. The type and relative amount of each isotope in an element can be found by: NMR spectroscopy R spectroscopy Mass spectroscopy UV spectroscopy Previous Finish