CUET CHEMISTRY MOCK TEST 2 Leave a Comment / By pdhantubalak / May 11, 2023 Welcome to your CUET CHEMISTRY MOCK TEST 2 Name Email 1. The drug is used as Deselect Answer Antacid Analgesic Antimicrobial Antiseptic 2. Which of the following statements is not correct? Deselect Answer Some antiseptics can be added to soaps Dilute solutions of some disinfectants can be used as antiseptic Disinfectants are antimicrobial drugs Antiseptic medicines can be ingested 3. RNA and DNA are chiral molecules, their chirality is due to Deselect Answer L-sugar component Chiral bases Chiral phosphate ester units D - sugar Component 4. Sucrose molecule is made up of Deselect Answer A gluco pyranose and a fructo pyranose A gluco pyranose and a fructo furanose A gluco furanose and a fructo pyranose A gluco furanose and a fructo furanose 5. Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be ______ Deselect Answer Primary structure of proteins Secondary structure of proteins Tertiary structure of proteins Quateranary structure of proteins 6. Which of the following compounds have the lowest Boiling rate? Deselect Answer Aniline Propyl amine Butyl amine Diethylamine 7. Which of the following is Hofmann mustard oil reaction? Deselect Answer Reaction of primary amine with CHCI3 Reaction of primary amine with CHCI3 + KOH Reaction of primary amine with CS2 + HgCI2 Reaction of aromatic amine with iodoform 8. Phenolic compound is formed in 1.2.3.4.Deselect Answer 1 2 3 4 9. Phenol reacts with excess of bromine water to produce Deselect Answer o - bromophenol p - bromophenol 2,4,6 - tribromophenol mixture of o - and p - bromophenol 10. ortho and para - nitrophenols are separated by which of the follwoing method? Deselect Answer Sublimation Crystallisatoin Steam - distillation Filteration 11. Which of the following is not formed by sandmeyer reaction Deselect Answer C6H5Cl C6H5I C6H5Br C6H5CN 12. Grignard reagent is a source of Deselect Answer carbocation carbanion Both (a) and (b) None of these 13. When acetic acid reacts with P2O5, product formed Deselect Answer ethyl acetate aceto-acetic ester acetic anhydride no reaction 14. Among the following acids least pKa value is of Deselect Answer oxalic acid pyruvic acid malonic acid succinic acid 15. From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium bromide? Deselect Answer HCHO CH3CHO CH3COCH3 CO2 16. Select the incorrect statement(s). Deselect Answer Protonation increases electrophilic nature of the carbonyl group Aldehydes are more reactive than ketones Carbonyl compounds cannot form hydrogen-bonding with H2O Chloral hydrate formation is possible due to hydrogen bonding 17. Addition of methanol to 2 - methylpropene in the presence of conc. H2SO4 gives Deselect Answer tert - butyl alcohol tert - butyl methyl ether di - tert - butyl ether dimethyl ether 18. The incorrect statement(s) about actinides is/are: Deselect Answer The 5f electrons of actinides are bound less tightly than the 4f electrons The trans uranium elements are prepared artificially All the actinides are radioactive. Actinides do not exhibit actinide contraction 19. Chlorine acts as bleaching agent only in presence of Deselect Answer Dry air Moisture Sunlight Pure oxygen 20. Which of the following statement is wrong Deselect Answer The stability of hydrides increase from NH3 to BiH3 in group 15 of the periodic table Nitrogen cannot form dπ - Pπ bond Single N - N bond is weaker than the single P - P bond N2O4 has two resonance structure 21. The incorrect statement among the following is Deselect Answer C60 is an allotropic form of carbon O3 is an allotropic form of oxygen S8 is only allotropic form of sulphur Red phosphorus is more stable in air than white phosphorus 22. In the following reaction the catalyst used is Deselect Answer Al2O3 Cr2O3 Cr2O3 and Al2O3 Zn dust 23. Amongst H2O, H2S, H2Se and H2Te the one with the highest boiling point is: Deselect Answer H2O because of hydrogen bonding H2Te because of higher molecular weight H2S because of hydrogen bonding H2Se because of lower molecular weight 24. The complex ion which has no 'd' electrons in the central metal atom is 1.[MnO4]-2.[Co(NH3)6]3+3.[Fe(CN)6]3-4.[Cr(H2O)6]3+Deselect Answer 1 2 3 4 25. Which of the following facts about complex [Cr(NH3)6]CI3 is wrong Deselect Answer The complex involves d2sp3 hybridisation and is octahedral in shape The complex is paramagnetic The complex is an outer orbital complex The complex gives white precipitate with silver nitrate solution 26. Which of the following characteristics is not correct for physical adoption Deselect Answer Monomolecular layer forms on the adsorbent Adsorption increases with increase in temperature Adsorption is spontaneous Both enthalpy and entropy of adsorption are negative 27. The given plots represent the variation of the concentration of a reactant R with time for two different reactions (i) and (ii) The respective orders of the reactions are Deselect Answer 0, 2 1, 0 0, 1 1, 1 28. T50 of first-order reaction is 10 min. Starting with 10 mol L-1 rate after 20 min is Deselect Answer 0.0693 mol L-1 min-1 0.0693 × 2.5 mol L-1 min-1 0.0693 × 5 mol L-2 min-1 0.0693 × 10 mol L-1 min-1 29. If doubling the concentration of a reactant 'A' increases the rate 4 times and tripling the concentration of 'A' increases the rate 9 times, the rate is proportional to Deselect Answer Concentration of 'A' Square of concentration of 'A' Under root of the concentration of 'A' Cube of concentration of 'A' 30. Electrode potential of Zn2+ / Zn is -0.76 V and that of Cu2+ / Cu is + 0.34V. The EMF of the cell constructed between these two electrodes is Deselect Answer 1.10 V 0.42 V -1.1 V -0.42 V 31. The catalyst used for the reaction SO2 + O2 → SO3 in Contact's Process is: Deselect Answer Iron Molybdenum Vanadium pentoxide Sulphur dioxide 32. A plot of log x/m, against log P is straight line inclines at an angle 45°, when the pressure is 0.4 atm, and Freundlich parameter, k is 100, the amount of solute adsorbed per gram of the adsorbent will be: Deselect Answer 20 10 40 4 33. Which has minimum osmotic pressure Deselect Answer 200 mL of 2 M NaCl solution 200 mL of 1 M glucose solution 200 mL of 2 M urea solution All have same osmotic pressure 34. For a non-volatile solute Deselect Answer Vapour pressure of solute is zero Vapour pressure of solvent is zero Vapour pressure of solution is more than vapour pressure of solvent All of the options 35. A saturated solution of sugar is prepared by dissolving 62.5 g of it in 250 g of water at 298 K. What is the solubility of sugar in water at this temperature? Deselect Answer 25 g per gram of water 50 g per 100 gram of water 0.25 g per gram of water 0.50 g per 100 gram of water 36. Which approach can be employed to produce a high degree of homogeneity in the creation of ZnFe2O4 spinel? Deselect Answer Distillation method Vaporization method Coprecipitation method Crystallization method 37. Iron at 20°C is BCC with atoms of atomic radius 0.124 nm. What is the lattice constant ‘a’ for the cube edge of the iron unit cell ? Deselect Answer 0.2864 nm 0.1496 nm 0.2173 nm 0.1756 nm 38. Which of the following statements is not true Deselect Answer Paramagnetic substances are weakly attracted by magnetic field Ferromagnetic substances cannot be magnetised permanently The domains in antiferromagnetic substances are oppositely oriented with respect to each other Pairing of electrons cancels their magnetic moment in the diamagnetic substances 39. Zn and Mg have the following crystal structure Deselect Answer B.C.C F.C.C. diamond cubic H.C.P. 40. The unit cell of a certain type of crystal is defined by three vectors a, b and c and the angle between a and b is α, b and c is β and a and c is γ. Now if α = β = γ = 90° and a = b ≠ c. The crystal structure is Deselect Answer Triclinic Tetragonal Orthorhombic Monoclinic 41. Read the passage given below and answer the following questions: The properties of the solutions which depend only on the number of solute particles but not on the nature of the solute are called colligative properties. Relative lowering in vapour pressure is also an example ofcolligative properties.For an experiment, sugar solution is prepared for which lowering in vapour pressure was found to be 0.061 mm of Hg. (Vapour pressure of water at 200C is 17.5 mm of Hg) Relative lowering of vapour pressure for the given solution isDeselect Answer 0.00348 0.061 0.122 1.75 42. Read the passage given below and answer the following questions: The properties of the solutions which depend only on the number of solute particles but not on the nature of the solute are called colligative properties. Relative lowering in vapour pressure is also an example ofcolligative properties.For an experiment, sugar solution is prepared for which lowering in vapour pressure was found to be 0.061 mm of Hg. (Vapour pressure of water at 200C is 17.5 mm of Hg) The vapour pressure (mm of Hg) of solution will beDeselect Answer 17.5 0.61 17.439 0.00348 43. Read the passage given below and answer the following questions: The properties of the solutions which depend only on the number of solute particles but not on the nature of the solute are called colligative properties. Relative lowering in vapour pressure is also an example ofcolligative properties.For an experiment, sugar solution is prepared for which lowering in vapour pressure was found to be 0.061 mm of Hg. (Vapour pressure of water at 200C is 17.5 mm of Hg)Mole fraction of sugar in the solution isDeselect Answer 0.00348 0.9965 0.061 1.75 44. Read the passage given below and answer the followingquestions: The properties of the solutions which depend only on the number of solute particles but not on the nature of the solute are called colligative properties. Relative lowering in vapour pressure is also an example ofcolligative properties. For an experiment, sugar solution is prepared for which lowering in vapour pressure was found to be 0.061 mm of Hg. (Vapour pressure of water at 200C is 17.5 mm of Hg)If weight of sugar taken is 5 g in 108 g of water then molar mass of sugar will beDeselect Answer 358 120 240 400 45. Read the passage given below and answer the following questions: The properties of the solutions which depend only on the number of solute particles but not on the nature of the solute are called colligative properties. Relative lowering in vapour pressure is also an example ofcolligative properties.For an experiment, sugar solution is prepared for which lowering in vapour pressure was found to be 0.061 mm of Hg. (Vapour pressure of water at 200C is 17.5 mm of Hg)The vapour pressure (mm of Hg) of water at 293K when 25g of glucose is dissolved in 450 g of water isDeselect Answer 17.2 17.4 17.120 17.02 46. Read the passage given below and answer any four out of the following questions:Ammonia is present in small quantities in air and soil where it is formed by the decay of nitrogenous organic matter e.g., urea. On a large scale, ammonia is manufactured by Haber’s process. In accordance with Le Chatelier’s principle, high pressure would favour the formation of ammonia. Ammonia is a colourless gas with a pungent odour. Its freezing and boiling points are 198.4 and 239.7 K respectively. In the solid and liquid states, it is associated through hydrogen bonds as in the case of water and that accounts for its higher melting and boiling points than expected on the basis of its molecular mass. Ammonia gas is highly soluble in water. Its aqueous solution is weakly basic due to the formation of OH– ions. The presence of a lone pair of electrons on the nitrogen atom of the ammonia molecule makes it a Lewis base.On a small scale, ammonia is obtained from ammonium salts which decompose when treated withDeselect Answer caustic soda calcium chloride sodium hydroxide sodium chloride 47. Read the passage given below and answer any four out of the following questions:Ammonia is present in small quantities in air and soil where it is formed by the decay of nitrogenous organic matter e.g., urea. On a large scale, ammonia is manufactured by Haber’s process. In accordance with Le Chatelier’s principle, high pressure would favour the formation of ammonia. Ammonia is a colourless gas with a pungent odour. Its freezing and boiling points are 198.4 and 239.7 K respectively. In the solid and liquid states, it is associated through hydrogen bonds as in the case of water and that accounts for its higher melting and boiling points than expected on the basis of its molecular mass. Ammonia gas is highly soluble in water. Its aqueous solution is weakly basic due to the formation of OH– ions. The presence of a lone pair of electrons on the nitrogen atom of the ammonia molecule makes it a Lewis base.The optimum conditions for the production of ammonia are a pressure ofDeselect Answer 200 105 Pa 400 105 Pa 100 105 Pa 300 105 Pa 48. Read the passage given below and answer any four out of the following questions:Ammonia is present in small quantities in air and soil where it is formed by the decay of nitrogenous organic matter e.g., urea. On a large scale, ammonia is manufactured by Haber’s process. In accordance with Le Chatelier’s principle, high pressure would favour the formation of ammonia. Ammonia is a colourless gas with a pungent odour. Its freezing and boiling points are 198.4 and 239.7 K respectively. In the solid and liquid states, it is associated through hydrogen bonds as in the case of water and that accounts for its higher melting and boiling points than expected on the basis of its molecular mass. Ammonia gas is highly soluble in water. Its aqueous solution is weakly basic due to the formation of OH– ions. The presence of a lone pair of electrons on the nitrogen atom of the ammonia molecule makes it a Lewis base.The catalyst which is used in the preparation of NH3 by Haber’s processDeselect Answer Mg2O3 + K2O Al2O3 + K2O NaO3 + K2O None of these 49. Read the passage given below and answer any four out of the following questions:Ammonia is present in small quantities in air and soil where it is formed by the decay of nitrogenous organic matter e.g., urea. On a large scale, ammonia is manufactured by Haber’s process. In accordance with Le Chatelier’s principle, high pressure would favour the formation of ammonia. Ammonia is a colourless gas with a pungent odour. Its freezing and boiling points are 198.4 and 239.7 K respectively. In the solid and liquid states, it is associated through hydrogen bonds as in the case of water and that accounts for its higher melting and boiling points than expected on the basis of its molecular mass. Ammonia gas is highly soluble in water. Its aqueous solution is weakly basic due to the formation of OH– ions. The presence of a lone pair of electrons on the nitrogen atom of the ammonia molecule makes it a Lewis base.The ammonium molecule has:Deselect Answer five bond pair and two lone pair four lone pair and one bond pair three bond pair and one lone pair three bond pair and two lone pair 50. Read the passage given below and answer any four out of the following questions:Ammonia is present in small quantities in air and soil where it is formed by the decay of nitrogenous organic matter e.g., urea. On a large scale, ammonia is manufactured by Haber’s process. In accordance with Le Chatelier’s principle, high pressure would favour the formation of ammonia. Ammonia is a colourless gas with a pungent odour. Its freezing and boiling points are 198.4 and 239.7 K respectively. In the solid and liquid states, it is associated through hydrogen bonds as in the case of water and that accounts for its higher melting and boiling points than expected on the basis of its molecular mass. Ammonia gas is highly soluble in water. Its aqueous solution is weakly basic due to the formation of OH– ions. The presence of a lone pair of electrons on the nitrogen atom of the ammonia molecule makes it a Lewis base.A compound reacts with ammonia to form deep colour solution, identify the compoundDeselect Answer Au2+ Cu2+ Al3+ Mg2+
