Chemistry Theory Past Paper 2024-2025 PDF

SAMPLE PAPER (2024 -25) CHEMISTRY THEORY (043) Max. Marks:70 Time: 3 hours GENERAL INSTRUCTIONS: Read the following instructions carefully. (a) There are 33 questions in this question paper with internal choic...

SAMPLE PAPER (2024 -25) CHEMISTRY THEORY (043) Max. Marks:70 Time: 3 hours GENERAL INSTRUCTIONS: Read the following instructions carefully. (a) There are 33 questions in this question paper with internal choice. (b) SECTION A consists of 16 multiple-choice questions carrying 1 mark each. (c) SECTION B consists of 5 short answer questions carrying 2 marks each. (d) SECTION C consists of 7 short answer questions carrying 3 marks each. (e) SECTION D consists of 2 case-based questions carrying 4 marks each. (f) SECTION E consists of 3 long answer questions carrying 5 marks each. (g) All questions are compulsory. (h) Use of log tables and calculators is not allowed. SECTION A The following questions are multiple-choice questions with one correct answer. Each question carries 1 mark. There is no internal choice in this section. 1 Ammonolysis of ethyl chloride followed by reaction of the amine so formed with 1 1 mole of methyl chloride gives an amine that a. reacts with Hinsberg reagent to form a product soluble in an alkali. b. on reaction with Nitrous acid, produced nitrogen gas. c. reacts with Benzenesulphonyl chloride to form a product that is insoluble in alkali. d. does not react with Hinsberg reagent. 2 Which one of the following has the highest dipole moment? 1 a. CH3F b. CH3Cl c. CH3I d. CH3Br 3 Match the properties given in column I with the metals in column II 1 Column I Column II (i) Actinoid having configuration [Rn] 5f 76d17s2 (A) Ce (ii) Lanthanoid which has 4f14 electronic (B) Lu configuration in +3 oxidation state. (iii) Lanthanoid which show +4 Oxidation state (C) Cm 1  a. (i)-(C), (ii)-(B), (iii)-(A) b. (i)-(C), (ii)-(A), (iii)-(B) c. (i)-(A), (ii)-(B), (iii)-(C) d. (i)-(B), (ii)-(A), (iii)-(C) 4 Study the graph showing the boiling points of bromoalkanes and identify the 1 compounds. a. 1 = Bromomethane, 2= 2-Bromobutane, 3= 1-Bromobutane, 4= 2-Bromo-2-methylpropane b. 1 =1-Bromobutane, 2= 2-Bromo-2-methylpropane, 3= 2-Bromobutane, 4= Bromomethane c. 1 = Bromomethane, 2=1-Bromobutane, 3= 2-Bromo-2-methylpropane, 4= 2-Bromobutane, d. 1 =Bromomethane, 2= 2-Bromo-2-methylpropane, 3=2- Bromobutane, 4= 1-Bromobutane (for visually challenged learners) Which of the following haloalkanes has the highest boiling point? a. 2-Bromo-2-methylpropane b. 2-Bromobutane c. Bromomethane d. 1-Bromobutane 2 5 The initial concentration of R in the reaction R🡪P is 4.62 x 10-2 mol/L. What is 1 the half life for the reaction if k = 2.31x 10-2 molL-1s-1 a. 30 s b. 3s c. 1s d. 10 s 6 When C6H5COOCOCH3 is treated with H2O , the product obtained is : 1 a. Benzoic acid and ethanol b. Benzoic acid and ethanoic acid c. Acetic Acid and phenol d. Benzoic anhydride and methanol 7 1 ‘X’ and ‘Y’ in the above table are: a. X=[Co(NH3)6]2+3Cl-, Y= 1:3 b. X= [Co(NH3)4Cl2]+Cl,- Y= 1:3 c. X=[Co(NH3)4Cl2]+Cl-, Y= 1:1 d. X=[Co(NH3)4Cl2]3+3Cl-, Y= 1:1 8 Which of the following contains only β-D- glucose as its monosaccharide unit: 1 a. Sucrose b. Cellulose c. Starch d. Maltose 9 Which one of the following sets correctly represents the increase in the 1 paramagnetic property of the ions? a. Ti3+< Fe2+ < Cr3+ < Mn2+ b. Ti3+< Mn2+< Fe2+ < Cr3+ c. Mn2+< Fe2+< Cr3+