CHEMISTRY MOCK TEST 1 Leave a Comment / By pdhantubalak / May 11, 2023 Welcome to your CHEMISTRY MOCK TEST 1 Name Email 1. Which of the following pair is/are correctly matched? Deselect Answer 1, 2, and 4 only 1, 2 and 3 only 2, 3, and 4 only 1, 2, 3, and 4 2. Consider the following statements regarding Tranquilizers? 1. It relieves anxiety, stress, irritability or excitement by inducing a sense of well-being. 2. It is a neurologically inactive drug. Which of the statements given above is/are not correct? Deselect Answer 1 only 2 only Both 1 and 2 Neither 1 nor 2 3. Which of the following statement is not correct Deselect Answer Insulin maintains sugar level in the blood of a human body Ovalbumin is a simple food reserve in egg white Denaturation makes the proteins more active Blood proteins thrombin and fibrinogen are involved in blood clotting 4. Which of the following reactions of glucose can be explained only by its cyclic structure Deselect Answer Glucose forms pentaacetate Glucose reacts with hydroxylamine to form an oxime Pentaacetate of glucose does not react with hydroxyl amine Glucose is oxidised by nitric acid to gluconic acid 5. When ethyl amine is treated with methyl magnesium bromide, the product is: Deselect Answer Methane Ethane Methanol Ethanol 6. C3H9N cannot represent the following Deselect Answer primary amine secondary amine tertiary amine quaternary ammonium salt 7. Acid anhydrides on reaction with primary amines give ______ Deselect Answer amide imide secondary amine imine 8. Select the correct statement about a carboxylic acid Deselect Answer C = O bond length is equal to C - O bond length due to resonance C = O bond length is larger than C - O bond length C = O bond length is shorter than C - O bond lentgh C - O, C = O and O - H bond lengths are equal 9. Which of the following statements is not true about Cannizzaro reaction? Deselect Answer It is a disproportionation reaction It is a proton-hydride transfer reaction It is given by all the carbonyl compounds It takes place with 50% aqueous or ethanolic solution 10. The reagent with which both acetaldehyde and acetone react easily is Deselect Answer Fehling's reagent Grignard reagent Schiff's reagent Tollen's reagent 11. In the following reaction, final product is 1.2.3.4.Deselect Answer 1 2 3 4 12. An ether is more volatile than an alcohol having the same molecular formula. This is due to Deselect Answer dipolar character of ethers alcohols having resonance structure intermolecular hydrogen bonding in ethers intermolecular hydrogen bonding in alcohols 13. When phenol is treated with CHCl3 and NaOH followed by acidification, salicylaldehyde is obtained. Which of the following species is involved in the above mentioned reaction as intermediates? 1.2.3.4.Deselect Answer 1 2 3 4 14. Phenol and NH3 reacts in presence of ZnCl2 at 300° C to produce Deselect Answer tertiary amine secondary amine primary amine All of these 15. Acetyl bromide reacts with excess of CH3Mgl followed by treatment with a saturated solution of NH4Cl gives Deselect Answer 2-methyl-2-propanol Acetamide Acetone Acetyl iodilde 16. What will be the product in the following reaction 1.2.3.4.Deselect Answer 1 2 3 4 17. Replacement of CI of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because Deselect Answer NO2 make ring electron rich at ortho and para NO2 withdraws e- from meta position -NO2 donates e- at meta position NO2 withdraws e- from ortho/para positions 18. Hot conc. H2SO4 acts as a moderately strong oxidizing agent. It oxidizes both metals and non-metals. Which of the following element is oxidized by conc. H2SO4 into two gaseous products: Deselect Answer Cu S c Zn 19. Identify the incorrect statement with respect to ozone Deselect Answer Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen Ozone is more reactive than oxygen Ozone is diamagnetic whereas dioxygen is paramagnetic Ozone protects the earth's inhabitants by absorbing γ radiations 20. Nitric acid can be obtained from ammonia via the formations of the intermediate compounds Deselect Answer Nitric oxides and nitrogen dioxides Nitrogen and nitric oxides Nitric oxide and dinitrogen pentoxide Nitrogen and nitrous oxide 21. The structural formula of hypophosphorous acid is 1.2.3.4.Deselect Answer 1 2 3 4 22. When 0.1 mol CoCl3(NH3)5 is treated with excess of AgNO3, 0.2 mol of AgCI are obtained. The conductivity of solution will correspond to Deselect Answer 1 : 3 electrolyte 1 : 2 electrolyte 1 : 1 electrolyte 3 : 1 electrolyte 23. . The CFSE for octahedral [CoCl6]4– is 18,000 cm–1. The CFSE for tetrahedral [CoCl4]2– will be (x) ×102 cm–1 the value of x is:Deselect Answer 80 405 40 202 24. When EDTA solution is added to Mg2+ ion solution, then which of the following statements is not true Deselect Answer Four coordinate sites of Mg2+ are occupied by EDTA and remaining two sites are occupied by water molecules All six coordinated sites of Mg2+ are occupied pH of the solution is decresed 25. . Ammonia forms the complex ion [(Cu(NH3)4]2+ with copper ions in alkaline solution but not in acidic solution.Deselect Answer In acidic solutions hydration protects copper ions In acidic solutions protons coordinate with ammonia molecules forming NH+4 ions and NH3 molecules are not available In acidic solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali Copper hydroxide is an amphoteric substance 26. Which of following is used in the preparation of chlorine Deselect Answer Only MnO2 Only KMnO4 Both MnO2 and KMnO4 Either MnO2 or KMnO4 27. HI cannot be prepared by the action of conc. H2SO4 on KI because Deselect Answer HI is stronger than H2SO4 HI is more volatile than H2SO4 H2SO4 is an oxidising agent H2SO4 forms complex 28. Identify the incorrect statement among the following Deselect Answer Ozone reacts with SO2 to give SO3 Silicon reacts with NaOH(aq) in the presence of air to give Na2SiO3 and H2O CL2 reacts with excess of NH3 to give N2 and HCI Br2 reacts with hot and strong NaOH solution to give NaBr, NaBrO4 and H2O 29. In Frevndlich Adsorption isotherm, the value of 1/n is Deselect Answer Between 0 and 1 in all cases Between 2 and 4 in all cases 1 in case of physical assorption 1 in case of chemisorption 30. The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3 are given below I. (NaCl) = 52 II. (BaCl2) = 0.69 III, (MgSO4) = 0.22 The correct order of their coagulating power is: Deselect Answer III > I > II I > II > III II > I > III III > II > I 31. When excess of electrolyte is added to a colloid it Deselect Answer Coagulates Precipitates Gets diluted Does not change 32. Pick the appropriate choice about collision theory of reaction rates Deselect Answer It explains the effect of temperature on rate of reaction It assumes that the reactants must be in correct orientation to react It says rate depends upon the frequency at which reactants collide The collisions having energy higher than the threshold value give successful reaction 33. In the given graph the activation energy, Ea for the reverse reaction will be Deselect Answer 150 kJ 50 KJ 200 KJ 100 KJ 34. A first order reaction has a specific reaction rate of 10-2 sec-1. How much time will it take for 20g of the reaction to reduce to 5g. Deselect Answer 238.6 sec 138.6 sec 346.5 sec 693.0 sec 35. Which one of the following statement for order of reaction not correct Deselect Answer Order can be determined experimentally Order of reaction is equal to sum of the powers concentration terms in differential rate law It is not affected with the stoichiometric coefficient the reactants Order cannot be fractional 36. Which of the statements about solutions of electrolytes is not correct Deselect Answer Conductivity of solution depends upon size of ions Conductivity depends upon viscosity of solution Conductivity does not depend upon solvation of ions present in solution Conductivity of solution increases with temperature 37. Change required to liberate 11.5 g sodium is Deselect Answer 0.5 F 0.1 F 1.5 F 96500 coulombs 38. Choose the incorrect statement from the following Deselect Answer Standard boiling point of a liquid is slightly lower than the normal boiling point. Boiling does not occur when liquid is heated in a closed vessel. The SI unit of coefficient of viscosity is kg m-1s-1. When the attractive forces between molecules of a liquid is large, the surface tension is low. 39. An aqueous solution of glucose is 10% in strength. The volume in which 1 g mole of it is dissolved will be Deselect Answer 18 litre 9 litre 0.9 litre 1.8 litre 40. Which of the following statements about amorphous solid is incorrect Deselect Answer They melt over a range of temperature They are anisotropic There is no orderly arrangement of particles They are rigid and incompressible 41. ead the passage given below and answer the following questions: A compound (X) containing C, H and O is unreactive towards sodium. It also does not react with Schiff’s reagent. On refluxing with an excess of hydroiodic acid, (X) yields only one organic product (Y). On hydrolysis, (Y) yields a new compound (Z) which can be converted into (Y) by reaction with red phosphorous and iodine. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid. The equivalent weight of this acid is 60.The compound (X) is anDeselect Answer acid aldehyde alcohol ether 42. Read the passage given below and answer the following questions: A compound (X) containing C, H and O is unreactive towards sodium. It also does not react with Schiff’s reagent. On refluxing with an excess of hydroiodic acid, (X) yields only one organic product (Y). On hydrolysis, (Y) yields a new compound (Z) which can be converted into (Y) by reaction with red phosphorous and iodine. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid. The equivalent weight of this acid is 60.The IUPAC name of the acid formed isDeselect Answer methanoic acid ethanoic acid propanoic acid butanoic acid 43. Read the passage given below and answer the following questions: A compound (X) containing C, H and O is unreactive towards sodium. It also does not react with Schiff’s reagent. On refluxing with an excess of hydroiodic acid, (X) yields only one organic product (Y). On hydrolysis, (Y) yields a new compound (Z) which can be converted into (Y) by reaction with red phosphorous and iodine. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid. The equivalent weight of this acid is 60. Compound (Y) isDeselect Answer ethyl iodide methyl iodide propyl iodide mixture of (a) and (b) 44. Read the passage given below and answer the following questions: A compound (X) containing C, H and O is unreactive towards sodium. It also does not react with Schiff’s reagent. On refluxing with an excess of hydroiodic acid, (X) yields only one organic product (Y). On hydrolysis, (Y) yields a new compound (Z) which can be converted into (Y) by reaction with red phosphorous and iodine. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid. The equivalent weight of this acid is 60.Compound (Z) isDeselect Answer methanol ethanol propanol butanol 45. Read the passage given below and answer the following questions: A compound (X) containing C, H and O is unreactive towards sodium. It also does not react with Schiff’s reagent. On refluxing with an excess of hydroiodic acid, (X) yields only one organic product (Y). On hydrolysis, (Y) yields a new compound (Z) which can be converted into (Y) by reaction with red phosphorous and iodine. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid. The equivalent weight of this acid is 60.Compound (X) on treatment with excess of Cl2 in presence of light givesDeselect Answer α-chlorodiethyl ether α, α’-dichlorodiethyl ether perchlorodiethyl ether none of these 46. Read the passage given below and answer the following questions: When a protein in its native form, is subjected to physical changes like change in temperature or chemical changes like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. The denaturation causes change in secondary and tertiary structures but primary structures remains intact. Examples of denaturation of protein are coagulation of egg white on boiling, curding of milk, formation of cheese when an acid is added to milk.Mark the wrong statement about denaturation of proteins.Deselect Answer The primary structure of the protein does not change. Globular proteins are converted into fibrous proteins. Fibrous proteins are converted into globular proteins. The biological activity of the protein is destroyed. 47. Read the passage given below and answer the following questions: When a protein in its native form, is subjected to physical changes like change in temperature or chemical changes like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. The denaturation causes change in secondary and tertiary structures but primary structures remains intact. Examples of denaturation of protein are coagulation of egg white on boiling, curding of milk, formation of cheese when an acid is added to milk.Which statement(s) of protein remain(s) intact during denaturation process?Deselect Answer Both secondary and tertiary structures primary structure only secondary structure only tertiary structure 48. Read the passage given below and answer the following questions: When a protein in its native form, is subjected to physical changes like change in temperature or chemical changes like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. The denaturation causes change in secondary and tertiary structures but primary structures remains intact. Examples of denaturation of protein are coagulation of egg white on boiling, curding of milk, formation of cheese when an acid is added to milk.α-helix and β-pleated structures of proteins are classified asDeselect Answer primary structure secondary structures tertiary structure quaternary structure 49. Read the passage given below and answer the following questions: When a protein in its native form, is subjected to physical changes like change in temperature or chemical changes like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. The denaturation causes change in secondary and tertiary structures but primary structures remains intact. Examples of denaturation of protein are coagulation of egg white on boiling, curding of milk, formation of cheese when an acid is added to milk.Cheese is aDeselect Answer globular protein conjugated protein denatured protein derived protein 50. Read the passage given below and answer the following questions: When a protein in its native form, is subjected to physical changes like change in temperature or chemical changes like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. The denaturation causes change in secondary and tertiary structures but primary structures remains intact. Examples of denaturation of protein are coagulation of egg white on boiling, curding of milk, formation of cheese when an acid is added to milk.Secondary structure of protein refers to Deselect Answer mainly denatured of proteins and structures of prosthetic groups three-dimensional structure, especially the bond between amino acid residues that are distant from each other in the polypeptide chain linear sequence of amino acid residues in the polypeptide chain regular folding patterns of continuous portions of the polypeptide chain.
