cbsc chemistry pyq 2024 (56-1-1)
1.Which one of the following first row transition elements is expected to have the highest third ionization enthalpy ? (A) Iron (Z = 26) (B) Manganese (Z = 25) (C) Chromium (Z = 24) (D) Vanadium (Z = 23)] 2. Which of the following compounds will give a ketone on oxidation with chromic anhydride (CrO ₃ ) ? (A) (CH ₃ ) ₂ CH - CH ₂ OH (B) CH ₃ CH ₂ CH ₂ OH (C) (CH ₃ ) ₃ C - OH (D) CH ₃ - CH ₂ - CH (OH) - CH ₃ 3.Two among the three components of DNA are -D-2-deoxyribose and a heterocyclic base. The third component is : (A) Adenine ...