CBSE Class 12 Chemistry Board Exam 2023 Practice Papers: View and download the latest supplementary practice papers and scoring scheme for the CBSE Class 12 Chemistry Board Exam 2023 PDF here.
        CBSE Class 12 Chemistry Practice Paper 2023: Board Chemistry Class 12 exam will take place on February 28, 2023. It is important to tackle practical work at the last minute of the exam. The Central Board of Secondary Education (CBSE) has released “Additional Practice Questions” for the 2023 Grade 12 Chemistry exam to help students test their level of readiness and understand a difficult subject. The sample test contains the plan and distribution of Mars for the exam and consists mainly of general questions. In addition, they are released a few months before the exam. On the other hand, the 2023 CBSE Class 12 Chemistry Practice Exam contains important questions to help you refresh your knowledge in the final days of the exam. These practice assignments are designed to help students assess their level of preparation and better understand the types of questions that will be asked on the final exam. You can read and download the CBSE Class 12 Chemistry Practice Paper 2023 PDF along with the grading scheme here.
        The CBSE Class 12 Chemistry Paper has 35 questions and is worth 70 points. The exam lasts 3 hours and includes multiple choice internal questions.
        Q.1 De-icing is the process of removing snow, ice or frost from a surface. In extremely cold regions, car windows are covered with ice, which reduces visibility. The image below shows the use of de-icing fluid on car windows in extremely cold conditions.
       He measured the rate of this reaction as a function of the initial concentration of reactants as follows:
       Which of the following could be the reason for the discrepancy between the original NO2 production rate data in Experiment 4?
       (ii) Electrons flow from the current source into the solution at one electrode, and the same number of electrons flow from the solution at the other electrode.
       (iii) The number of positive ions moving towards one electrode is always equal to the number of negative ions moving towards the other electrode.
       Q.7 The metal ion Mn+ forms a complex ion of the formula [ML2](n-4)+ where L is a bidentate ligand.
       Q.8 The figure below shows the various benzene derivatives that produce mononitrated products in the ortho, meta, and para positions, and the rate of nitration relative to benzene.
       Q.9 The reaction rate constants at 400 K and 600 K are 5 x 10-3 s-1 and 8 x 10-3 s-1 respectively.
       Q.12 During protein synthesis in cells, amino acids are condensed (in the presence of enzymes) to form polypeptide chains by forming amide bonds (-CONH-) or peptide bonds, which then fold to form biologically active polypeptide chain proteins.
       The equation below shows the formation of the dipeptide Ala-Gly, which is formed by the condensation of two amino acids (alanine and glycine) in a test tube.
        Q13 Zirconium (Zr, atomic number 40) and hafnium (Hf, atomic number 72) are group 4 transition metals. They exist together in nature and are difficult to separate from each other.
       Statement (A): At constant temperature, the dissociation constant of chloroacetic acid will be higher than that of propionic acid.
       Reason (R): The greater the number of carbon atoms in the compound, the lower the dissociation constant.
       Statement (A): Propan-2-ol and 2-methylpropan-2-ol, when heated with acidified potassium dichromate at room temperature, slowly turn the orange dichromate to green.
       Reason (R): Secondary and tertiary alcohols readily oxidize to aldehydes, which in turn oxidize to acids.
       CBSE Class 12 2023 Date Table: Check Theory and Practice Council Class 12 Exam Dates, Schedule and Download PDF

Post time: May-11-2023