Class 12 Chemistry Preboard 1 Paper

PRE BOARD 1(2024 25) Time:3 Hrs. General Instructions: 1. There are 33 questions in this question paper with internal choice. 2. SECTION A consists of 16 multiple -choice questions carrying I mark each. 3. SECTION B consists of 5 short answer questions carrying 2 marks each. 4. SECTION C consists of7 short answer questions carrying 3 marks each. S. SECTION D consists of 2 case -based questions carrying 4 marks each. 6. 7. SECTION E consists of 3 long answer questions carrying 5 marks each. All questions are compulsory. Use of log tables and calculators is not allowed. 1. On increasing temperature, a) The following questions (1-12) are multiple-choice questions with one correct answer. Each question carries 1 mark. There is no internal choice in this section. b) c) d) a) b) R-OH + Na RONat + H21 c) 2. What is the correct order of reactivity of alcohols in the following reaction? a) b) c) d) a) ionic conductance increases and electronic conductance decreases. ionic conductance decreases and electronic conductance increases. b) both ionic and electronic conductance increase. d) CLASS XII CHEMISTRY both ionic and electronic conductance decrease. 3. Which cell will measure standard clecrai oiential of copper electrode?